d3 parallel coordinates - colour coding

d3 parallel coordinates - colour coding - javascript

Hi I am using d3 for plotting a parallel coordinate chart. I want to colour the lines based on a specific categorical attribute.
Even though I have defined a colour palette and specified that range as well, the colour doesn't seem to plot.
The line colours do not change. What am I doing wrong?
Here's the code:
<!DOCTYPE html>
<meta charset="utf-8">
<style>
svg {
font: 10px sans-serif;
}
.background path {
fill: none;
stroke: #ddd;
shape-rendering: crispEdges;
}
.foreground path {
fill: none;
stroke: steelblue;
}
.brush .extent {
fill-opacity: .3;
stroke: #fff;
shape-rendering: crispEdges;
}
.axis line,
.axis path {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.axis text {
text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, 0 -1px 0 #fff, -1px 0 0 #fff;
cursor: move;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 30, right: 10, bottom: 10, left: 10},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var x = d3.scale.ordinal().rangePoints([0, width], 1),
y = {},
dragging = {};
var line = d3.svg.line(),
axis = d3.svg.axis().orient("left"),
background,
foreground;
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var color = d3.scale.ordinal()
.domain(['white','asian/pacific islander','african-american','hispanic','other'])
.range(['blue','green','black','yellow', 'gray']);
d3.csv("SurvivalProbability.csv", function(error, cars) {
// Extract the list of dimensions and create a scale for each.
x.domain(dimensions = d3.keys(cars[0]).filter(function(d) {
if(d === "Ethnicity") {
y[d] = d3.scale.ordinal()
.domain(cars.map(function(p) { return p[d]; }))
.rangePoints([height, 0]);
}
else if(d === "Site") {
y[d] = d3.scale.ordinal()
.domain(cars.map(function(p) { return p[d]; }))
.rangePoints([height, 0]);
}
else if(d === "Tcategory") {
y[d] = d3.scale.ordinal()
.domain(cars.map(function(p) { return p[d]; }))
.rangePoints([height, 0]);
}
else if(d === "Nodal_Disease") {
y[d] = d3.scale.ordinal()
.domain(cars.map(function(p) { return p[d]; }))
.rangePoints([height, 0]);
}
else if(d === "Chemotherapy") {
y[d] = d3.scale.ordinal()
.domain(cars.map(function(p) { return p[d]; }))
.rangePoints([height, 0]);
}
else if(d === "Local_Therapy") {
y[d] = d3.scale.ordinal()
.domain(cars.map(function(p) { return p[d]; }))
.rangePoints([height, 0]);
}
else {
y[d] = d3.scale.linear()
.domain(d3.extent(cars, function(p) { return +p[d]; }))
.range([height, 0]);
}
return true;
}));
// Add grey background lines for context.
background = svg.append("g")
.attr("class", "background")
.selectAll("path")
.data(cars)
.enter().append("path")
.attr("d", path);
// Add blue foreground lines for focus.
/*foreground = svg.append("g")
.attr("class", "foreground")
.selectAll("path")
.data(cars)
.enter().append("path")
.attr("d", path);*/
foreground = svg.append("g")
.attr("class", "foreground")
.selectAll("path")
.data(cars)
.enter().append("path")
.attr("d", path)
.attr("stroke", function(d) {
return color(d.Ethnicity);
})
// Add a group element for each dimension.
var g = svg.selectAll(".dimension")
.data(dimensions)
.enter().append("g")
.attr("class", "dimension")
.attr("transform", function(d) { return "translate(" + x(d) + ")"; })
.call(d3.behavior.drag()
.origin(function(d) { return {x: x(d)}; })
.on("dragstart", function(d) {
dragging[d] = x(d);
background.attr("visibility", "hidden");
})
.on("drag", function(d) {
dragging[d] = Math.min(width, Math.max(0, d3.event.x));
foreground.attr("d", path);
dimensions.sort(function(a, b) { return position(a) - position(b); });
x.domain(dimensions);
g.attr("transform", function(d) { return "translate(" + position(d) + ")"; })
})
.on("dragend", function(d) {
delete dragging[d];
transition(d3.select(this)).attr("transform", "translate(" + x(d) + ")");
transition(foreground).attr("d", path);
background
.attr("d", path)
.transition()
.delay(500)
.duration(0)
.attr("visibility", null);
}));
// Add an axis and title.
g.append("g")
.attr("class", "axis")
.each(function(d) { d3.select(this).call(axis.scale(y[d])); })
.append("text")
.style("text-anchor", "middle")
.attr("y", -9)
.text(function(d) { return d; });
// Add and store a brush for each axis.
g.append("g")
.attr("class", "brush")
.each(function(d) {
d3.select(this).call(y[d].brush = d3.svg.brush().y(y[d]).on("brushstart", brushstart).on("brush", brush));
})
.selectAll("rect")
.attr("x", -8)
.attr("width", 16);
});
function position(d) {
var v = dragging[d];
return v == null ? x(d) : v;
}
function transition(g) {
return g.transition().duration(500);
}
// Returns the path for a given data point.
function path(d) {
return line(dimensions.map(function(p) { return [position(p), y[p](d[p])]; }));
}
function brushstart() {
d3.event.sourceEvent.stopPropagation();
}
// Handles a brush event, toggling the display of foreground lines.
function brush() {
var actives = dimensions.filter(function(p) { return !y[p].brush.empty(); }),
extents = actives.map(function(p) { return y[p].brush.extent(); });
foreground.style("display", function(d) {
return actives.every(function(p, i) {
return extents[i][0] <= d[p] && d[p] <= extents[i][1];
}) ? null : "none";
});
}
</script>

Related

d3.js legend overlapping chart area

I'm pretty new to D3.js (I'm a R programmer).
I'm trying to create a scatter and put a legend in the right bottom. However, it's overlapping with chart area.
I've been trying to take some examples in internet with no lucky.
When I try to move it to the right, the names and/or symbols are not visible.
I want to place the legend outside the chart frame, so it won't overlap.
Any help is appreciated.
Here's what I tried so far:
d3.csv('https://gist.githubusercontent.com/netj/8836201/raw/6f9306ad21398ea43cba4f7d537619d0e07d5ae3/iris.csv', function(data) {
// CSV section
var body = d3.select('body')
var selectData = [{
"text": "sepal.length"
},
{
"text": "sepal.width"
},
{
"text": "petal.length"
},
{
"text": "petal.width"
},
]
// setup fill color
var colors = ['#575757', '#5FB1B9', '#C94257'];
var symbol = d3.svg.symbol()
.type('circle')
.size("160")
var cValue = function(d) {
return d.variety;
},
color = d3.scale.ordinal()
.range(colors);
// Select Y-axis Variable
var span = body.append('span')
.text('Select Y-Axis variable: ')
var yInput = body.append('select')
.attr('id', 'ySelect')
.on('change', yChange)
.selectAll('option')
.data(selectData)
.enter()
.append('option')
.attr('value', function(d) {
return d.text
})
.text(function(d) {
return d.text;
})
body.append('br')
// Select X-axis Variable
var span = body.append('span')
.text('Select X-Axis variable: ')
var yInput = body.append('select')
.attr('id', 'xSelect')
.on('change', xChange)
.selectAll('option')
.data(selectData)
.enter()
.append('option')
.attr('value', function(d) {
return d.text
})
.text(function(d) {
return d.text;
})
body.append('br')
// Variables
var body = d3.select('body')
var margin = {
top: 50,
right: 50,
bottom: 50,
left: 50
}
var h = 500 - margin.top - margin.bottom
var w = 500 - margin.left - margin.right
// var formatPercent = d3.format('.2%')
// Scales
// var colorScale = d3.scale.category20()
var xScale = d3.scale.linear()
.domain([
d3.min([0, d3.min(data, function(d) {
return d['sepal.length']
})]),
d3.max([0, d3.max(data, function(d) {
return d['sepal.length']
})])
])
.range([0, w])
var yScale = d3.scale.linear()
.domain([
d3.min([0, d3.min(data, function(d) {
return d['sepal.length']
})]),
d3.max([0, d3.max(data, function(d) {
return d['sepal.length']
})])
])
.range([h, 0])
// SVG
var svg = body.append('svg')
.attr('height', h + margin.top + margin.bottom)
.attr('width', w + margin.left + margin.right)
.append('g')
.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')')
// X-axis
var xAxis = d3.svg.axis()
.scale(xScale)
// .tickFormat(formatPercent)
.ticks(6)
.outerTickSize(0)
.tickSize(0)
.orient('bottom')
// Y-axis
var yAxis = d3.svg.axis()
.scale(yScale)
// .tickFormat(formatPercent)
.ticks(6)
.tickSize(-w)
.outerTickSize(0)
.orient('left')
// Circles
var circles = svg.selectAll('circle')
.data(data)
.enter()
.append('circle')
.attr('cx', function(d) {
return xScale(d['sepal.length'])
})
.attr('cy', function(d) {
return yScale(d['sepal.length'])
})
.attr('r', '10')
// .attr('stroke', 'black')
.attr('stroke-width', 0.2)
.attr("fill", function(d) {
return color(cValue(d));
})
.attr('fill-opacity', 0.8)
// .attr('fill', function(d, i) {
// return colorScale(i)
// })
.on('mouseover', function() {
d3.select(this)
.transition()
.duration(300)
.ease('elastic')
.attr('r', 15)
.attr('stroke-width', 1)
.attr('fill-opacity', 1)
})
.on('mouseout', function() {
d3.select(this)
.transition()
.duration(100)
.attr('r', 10)
.attr('stroke-width', 0.5)
})
.append('title') // Tooltip
.text(function(d) {
return d.variety +
'\nSepal Length: ' + d['sepal.length'] +
'\nSepal Width: ' + d['sepal.width'] +
'\nPetal Length: ' + d['petal.length'] +
'\nPetal Width: ' + d['petal.width']
})
// X-axis
svg.append('g')
.attr('class', 'axis')
.attr('id', 'xAxis')
.attr('transform', 'translate(0,' + h + ')')
.call(xAxis)
.append('text') // X-axis Label
.attr('id', 'xAxisLabel')
.attr('y', -25)
.attr('x', w)
.attr('dy', '.71em')
.style('text-anchor', 'end')
.text('Sepal Length')
// labels distance from xaxis
svg.selectAll(".axis text")
.attr("dy", 15);
// Y-axis
svg.append('g')
.attr('class', 'axis')
.attr('id', 'yAxis')
.call(yAxis)
.append('text') // y-axis Label
.attr('id', 'yAxisLabel')
.attr('transform', 'rotate(-90)')
.attr('x', 0)
.attr('y', 5)
.attr('dy', '.71em')
.style('text-anchor', 'end')
.text('Sepal Length')
function yChange() {
var value = this.value // get the new y value
yScale // change the yScale
.domain([
d3.min([0, d3.min(data, function(d) {
return d[value]
})]),
d3.max([0, d3.max(data, function(d) {
return d[value]
})])
])
yAxis.scale(yScale) // change the yScale
d3.select('#yAxis') // redraw the yAxis
.transition().duration(500)
.call(yAxis)
d3.select('#yAxisLabel') // change the yAxisLabel
.text(value)
d3.selectAll('circle') // move the circles
.transition().duration(500)
.delay(function(d, i) {
return i * 10
})
.attr('cy', function(d) {
return yScale(d[value])
})
}
function xChange() {
var value = this.value // get the new x value
xScale // change the xScale
.domain([
d3.min([0, d3.min(data, function(d) {
return d[value]
})]),
d3.max([0, d3.max(data, function(d) {
return d[value]
})])
])
xAxis.scale(xScale) // change the xScale
d3.select('#xAxis') // redraw the xAxis
.transition().duration(500)
.call(xAxis)
d3.select('#xAxisLabel') // change the xAxisLabel
.transition().duration(500)
.text(value)
d3.selectAll('circle') // move the circles
.transition().duration(500)
.delay(function(d, i) {
return i * 10
})
.attr('cx', function(d) {
return xScale(d[value])
})
}
// create legend
var legend = svg.selectAll(".legend")
.data(color.domain())
.enter().append("g")
.attr("class", "legend")
.attr("transform", function(d, i) {
return "translate(0," + i * 25 + ")";
});
// draw legend colored rectangles
legend.append("path")
.attr('d', symbol)
.attr("transform", "translate(434, 313)") //much easier approach to position the symbols
// .attr("x", w + 34)
// .attr("y", h - 97)
// .attr("width", 18)
// .attr("height", 18)
.style("fill", color);
// draw legend text
legend.append("text")
.attr("transform", "translate(422, 311)")
// .attr("x", w + 24)
// .attr("y", h - 89)
.attr("dy", ".35em")
.style("text-anchor", "end")
.text(function(d) {
return d;
})
})
body {
font-size: 16px;
}
/*
circle {
fill: steelblue;
} */
circle:hover {
fill: orange;
}
.axis text {
font-size: 13px;
/* font-weight: bold; */
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
stroke-width: 0.02px;
}
/* .circle {
fill: orange;
} */
label {
position: absolute;
top: 10px;
right: 10px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.10/d3.min.js"></script>
<body></body>

Why not just render your legend as HTML and use CSS to help with layout?
d3.csv('https://gist.githubusercontent.com/netj/8836201/raw/6f9306ad21398ea43cba4f7d537619d0e07d5ae3/iris.csv', function(data) {
// CSV section
var body = d3.select('body')
var selectData = [{
"text": "sepal.length"
},
{
"text": "sepal.width"
},
{
"text": "petal.length"
},
{
"text": "petal.width"
},
]
// setup fill color
var colors = ['#575757', '#5FB1B9', '#C94257'];
var symbol = d3.svg.symbol()
.type('circle')
.size("160")
var cValue = function(d) {
return d.variety;
},
color = d3.scale.ordinal()
.range(colors);
var controls = body.append('div').attr('class', 'controls')
// Select Y-axis Variable
var yControls = controls.append('div')
var span = yControls.append('span')
.text('Select Y-Axis variable: ')
var yInput = yControls.append('select')
.attr('id', 'ySelect')
.on('change', yChange)
.selectAll('option')
.data(selectData)
.enter()
.append('option')
.attr('value', function(d) {
return d.text
})
.text(function(d) {
return d.text;
})
// Select X-axis Variable
var xControls = controls.append('div')
var span = xControls.append('span')
.text('Select X-Axis variable: ')
var yInput = xControls.append('select')
.attr('id', 'xSelect')
.on('change', xChange)
.selectAll('option')
.data(selectData)
.enter()
.append('option')
.attr('value', function(d) {
return d.text
})
.text(function(d) {
return d.text;
})
// Variables
var body = d3.select('body')
var margin = {
top: 50,
right: 50,
bottom: 50,
left: 50
}
var h = 500 - margin.top - margin.bottom
var w = 500 - margin.left - margin.right
var xScale = d3.scale.linear()
.domain([
d3.min([0, d3.min(data, function(d) {
return d['sepal.length']
})]),
d3.max([0, d3.max(data, function(d) {
return d['sepal.length']
})])
])
.range([0, w])
var yScale = d3.scale.linear()
.domain([
d3.min([0, d3.min(data, function(d) {
return d['sepal.length']
})]),
d3.max([0, d3.max(data, function(d) {
return d['sepal.length']
})])
])
.range([h, 0])
// SVG
var svgContainer = body.append('div').attr('class', 'svg-container')
var svg = svgContainer.append('svg')
.attr('height', h + margin.top + margin.bottom)
.attr('width', w + margin.left + margin.right)
.append('g')
.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')')
// X-axis
var xAxis = d3.svg.axis()
.scale(xScale)
// .tickFormat(formatPercent)
.ticks(6)
.outerTickSize(0)
.tickSize(0)
.orient('bottom')
// Y-axis
var yAxis = d3.svg.axis()
.scale(yScale)
// .tickFormat(formatPercent)
.ticks(6)
.tickSize(-w)
.outerTickSize(0)
.orient('left')
// Circles
var circles = svg.selectAll('circle')
.data(data)
.enter()
.append('circle')
.attr('cx', function(d) {
return xScale(d['sepal.length'])
})
.attr('cy', function(d) {
return yScale(d['sepal.length'])
})
.attr('r', '10')
// .attr('stroke', 'black')
.attr('stroke-width', 0.2)
.attr("fill", function(d) {
return color(cValue(d));
})
.attr('fill-opacity', 0.8)
// .attr('fill', function(d, i) {
// return colorScale(i)
// })
.on('mouseover', function() {
d3.select(this)
.transition()
.duration(300)
.ease('elastic')
.attr('r', 15)
.attr('stroke-width', 1)
.attr('fill-opacity', 1)
})
.on('mouseout', function() {
d3.select(this)
.transition()
.duration(100)
.attr('r', 10)
.attr('stroke-width', 0.5)
})
.append('title') // Tooltip
.text(function(d) {
return d.variety +
'\nSepal Length: ' + d['sepal.length'] +
'\nSepal Width: ' + d['sepal.width'] +
'\nPetal Length: ' + d['petal.length'] +
'\nPetal Width: ' + d['petal.width']
})
// X-axis
svg.append('g')
.attr('class', 'axis')
.attr('id', 'xAxis')
.attr('transform', 'translate(0,' + h + ')')
.call(xAxis)
.append('text') // X-axis Label
.attr('id', 'xAxisLabel')
.attr('y', -25)
.attr('x', w)
.attr('dy', '.71em')
.style('text-anchor', 'end')
.text('Sepal Length')
// labels distance from xaxis
svg.selectAll(".axis text")
.attr("dy", 15);
// Y-axis
svg.append('g')
.attr('class', 'axis')
.attr('id', 'yAxis')
.call(yAxis)
.append('text') // y-axis Label
.attr('id', 'yAxisLabel')
.attr('transform', 'rotate(-90)')
.attr('x', 0)
.attr('y', 5)
.attr('dy', '.71em')
.style('text-anchor', 'end')
.text('Sepal Length')
function yChange() {
var value = this.value // get the new y value
yScale // change the yScale
.domain([
d3.min([0, d3.min(data, function(d) {
return d[value]
})]),
d3.max([0, d3.max(data, function(d) {
return d[value]
})])
])
yAxis.scale(yScale) // change the yScale
d3.select('#yAxis') // redraw the yAxis
.transition().duration(500)
.call(yAxis)
d3.select('#yAxisLabel') // change the yAxisLabel
.text(value)
d3.selectAll('circle') // move the circles
.transition().duration(500)
.delay(function(d, i) {
return i * 10
})
.attr('cy', function(d) {
return yScale(d[value])
})
}
function xChange() {
var value = this.value // get the new x value
xScale // change the xScale
.domain([
d3.min([0, d3.min(data, function(d) {
return d[value]
})]),
d3.max([0, d3.max(data, function(d) {
return d[value]
})])
])
xAxis.scale(xScale) // change the xScale
d3.select('#xAxis') // redraw the xAxis
.transition().duration(500)
.call(xAxis)
d3.select('#xAxisLabel') // change the xAxisLabel
.transition().duration(500)
.text(value)
d3.selectAll('circle') // move the circles
.transition().duration(500)
.delay(function(d, i) {
return i * 10
})
.attr('cx', function(d) {
return xScale(d[value])
})
}
// create legend
var legendContainer = body.append('div')
.attr('class', 'legend-container')
var legend = legendContainer.selectAll(".legend")
.data(color.domain())
.enter().append("div")
.attr("class", "legend")
// draw legend colored rectangles
legend.append("span")
.attr("class", "legend-color")
.style("background-color", color);
// draw legend text
legend.append("span")
.text(function(d) {
return d;
})
})
body {
font-size: 16px;
display: flex;
flex-wrap: wrap;
}
.controls {
flex: 1 1 100%;
}
.legend-container {
align-items: center;
flex: 0 1 auto;
align-self: center;
margin: 0 auto;
}
circle:hover {
fill: orange;
}
.axis text {
font-size: 13px;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
stroke-width: 0.02px;
}
label {
position: absolute;
top: 10px;
right: 10px;
}
.legend {
margin-bottom: 0.5em;
}
.legend-color {
width: 20px;
height: 20px;
display: inline-block;
border-radius: 50%;
vertical-align: middle;
margin-right: 1em;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.10/d3.min.js"></script>
<body></body>
With this approach you end up with a structure like this:
body
.controls
.svg-container
svg
.legend-container
which can make responsive layouts especially easy with CSS.

How to create a grouped bars brushable chart with D3 js

I am creating a brushable bar chart, in the Y axis I need to have grouped chart with brushable content, whenever I am moving the brush, the graph is not getting refreshing.
Used the below code for creating the additional bar,
var bar2 = bar.enter().append("rect")
.attr("class", "bar2")
.attr("id","lesser")
.style("fill", "#ff7f0e")
.attr("y", function(d,i) { return main_yScale(d.country); })
.attr("height", main_yScale.rangeBand()/2)
.attr("x", 0)
.transition().duration(50)
.attr("width", function(d) { return main_xScale(d.result); });
I have tried in http://jsfiddle.net/mouneshp777/7xp10awb/1/
I am not able to fix the issue.
Thanks in Advance

The main problem is the way you use the join-pattern (selectAll("abc").data(mylist).enter()). Read the docs again to see the details.
why create a zoom when you don't use it. I have removed it from the example
every thing regarding tool tips is commented
do not calculate a new domain for X on each brush move, it gives the impression that the values change because the bar changes size.
don't define multiple elements with the same id (greater / lesser). Use a class.
define the fill with an attribute or with a style but not both and using different colors makes it even harder to determine which color you want/will be used.
why animate the width - 50ms is so short nobody will notice
what is the use of scroll()?
maybe an idea to port the chart over to d3v5
var data = [], svg, defs,gBrush, brush, main_xScale, mini_xScale, main_yScale,
mini_yScale,main_yZoom, main_xAxis, main_yAxis, mini_width, textScale;
init();
function init() {
for (var i = 1; i < 30; i++) {
var my_object = {};
my_object.key = i;
my_object.country = "Label"+i;
my_object.gtLabel = "greater";
my_object.value = Math.floor(Math.random() * 600);
my_object.ltLabel = "Lesser";
my_object.result = Math.floor(Math.random() * 300);
data.push(my_object);
}
// var zoomer = d3.behavior.zoom()
// .on("zoom", null);
var main_margin = {top: 10, right: 10, bottom: 30, left: 100},
main_width = 450 - main_margin.left - main_margin.right,
main_height = 250 - main_margin.top - main_margin.bottom;
var mini_margin = {top: 10, right: 10, bottom: 30, left: 10},
mini_height = 250 - mini_margin.top - mini_margin.bottom;
mini_width = 100 - mini_margin.left - mini_margin.right;
svg = d3.select("body").append("svg")
.attr("class", "svgWrapper")
.attr("width", main_width + main_margin.left + main_margin.right + mini_width + mini_margin.left + mini_margin.right)
.attr("height", main_height + main_margin.top + main_margin.bottom);
// .call(zoomer)
// .on("wheel.zoom", scroll)
// .on("mousedown.zoom", null)
// .on("touchstart.zoom", null)
// .on("touchmove.zoom", null)
// .on("touchend.zoom", null);
var mainGroup = svg.append("g")
.attr("class","mainGroupWrapper")
.attr("transform","translate(180,10)")
.append("g")
.attr("clip-path", "url(#clip)")
.style("clip-path", "url(#clip)")
.attr("class","mainGroup");
var miniGroup = svg.append("g")
.attr("class","miniGroup")
.attr("transform","translate(135,10)");
var brushGroup = svg.append("g")
.attr("class","brushGroup")
.attr("transform","translate(135,10)");
main_xScale = d3.scale.linear().range([0, main_width]);
mini_xScale = d3.scale.linear().range([0, mini_width]);
main_yScale = d3.scale.ordinal().rangeBands([0, main_height], 0.4, 0);
mini_yScale = d3.scale.ordinal().rangeBands([0, mini_height], 0.4, 0);
main_yZoom = d3.scale.linear()
.range([0, main_height])
.domain([0, main_height]);
main_xAxis = d3.svg.axis()
.scale(main_xScale)
.orient("bottom")
.tickFormat(d3.format(".2s"));
d3.select(".mainGroupWrapper")
.append("g")
.attr("class", "x axis")
.attr("transform", "translate(" + 0 + "," + (main_height + 5) + ")");
svg.append("text")
.attr("transform", "translate(" + (main_width / 2) + " ," + (main_height + (main_margin.bottom -60) ) +")")
.attr("dy", ".71em")
.attr("class", "x axis")
.attr("stroke-width",1)
.style("font-size","15px")
.text("");
main_yAxis = d3.svg.axis()
.scale(main_yScale)
.orient("left").tickSize(5);
mainGroup.append("g")
.attr("class", "y axis")
.attr("transform", "translate(-48,0)");
main_xScale.domain([0, d3.max(data, function(d) { return d.value; })]);
mini_xScale.domain([0, d3.max(data, function(d) { return d.value; })]);
main_yScale.domain(data.map(function(d) { return d.country; }));
mini_yScale.domain(data.map(function(d) { return d.country; }));
d3.select(".mainGroup").select(".y.axis").call(main_yAxis);
textScale = d3.scale.linear()
.domain([25,50])
.range([12,6])
.clamp(true);
var brushExtent = 15;// Math.max( 1, Math.min( 20, Math.round(data.length*0.2)));
brush = d3.svg.brush()
.y(mini_yScale)
.extent([mini_yScale(data[0].country), mini_yScale(data[brushExtent].country)])
.on("brush", brushmove);
gBrush = d3.select(".brushGroup").append("g")
.attr("class", "brush")
.call(brush);
gBrush.selectAll(".resize")
.append("line")
.attr("x2", 40);
gBrush.selectAll("rect")
.attr("width", 40);
gBrush.select(".background")
.on("mousedown.brush", brushcenter)
.on("touchstart.brush", brushcenter);
defs = svg.append("defs")
defs.append("clipPath")
.attr("id", "clip")
.append("rect")
.attr("x", -main_margin.left)
.attr("width", main_width + main_margin.left)
.attr("height", main_height);
var mini_bar = d3.select(".miniGroup").selectAll(".bar")
.data(data, function(d) { return d.key; });
mini_bar
.attr("width", function(d) { return (mini_xScale(d.value)/2.2); })
.attr("y", function(d,i) { return mini_yScale(d.country); })
.attr("height", mini_yScale.rangeBand());
mini_bar.enter().append("rect")
.attr("class", "bar")
.attr("x", 0)
.attr("width", function(d) { return mini_xScale(d.value/2.2); })
.attr("y", function(d,i) { return mini_yScale(d.country); })
.attr("height", mini_yScale.rangeBand())
.style("fill", "url(#gradient-rainbow-mini)");
mini_bar.exit()
.remove();
gBrush.call(brush.event);
}
function update() {
// var divTooltip = svg.append("div").attr("class", "toolTip");
if (d3.select(".mainGroup").select(".bar2.greater").empty()) {
var bar = d3.select(".mainGroup").selectAll(null)
.data(data, function(d) { return d.key; });
bar.enter().append("rect")
.attr("class", "bar2 greater")
.attr("fill", "#1f77b4")
.attr("x", 0);
bar.enter().append("rect")
.attr("class", "bar2 lesser")
.attr("fill", "#ff7f0e")
.attr("x", 0);
}
d3.selectAll(".bar2.greater")
.attr("y", function(d) { return main_yScale(d.country) + main_yScale.rangeBand()/2; })
.attr("width", function(d) { return main_xScale(d.value); })
.attr("height", main_yScale.rangeBand()/2);
d3.selectAll(".bar2.lesser")
.attr("y", function(d,i) { return main_yScale(d.country); })
.attr("width", function(d) { return main_xScale(d.result); })
.attr("height", main_yScale.rangeBand()/2);
// bar
// .attr("y", function(d,i) { return main_yScale(d.country); })
// .attr("height", main_yScale.rangeBand())
// .attr("x", 0)
// .transition().duration(50)
// .attr("width", function(d) { return main_xScale(d.value); });
// var bar1= bar.enter().append("rect")
// .attr("class", "bar2")
// // .attr("id","greater")
// // .style("fill", "#1f77b4")
// // .attr("fill", function(d,i) { return "#000" })
// .attr("fill", "#1f77b4")
// .attr("y", function(d,i) { return main_yScale(d.country) + main_yScale.rangeBand()/2; })
// .attr("height", main_yScale.rangeBand()/2)
// .attr("x", 0)
// .transition().duration(50)
// .attr("width", function(d) { return main_xScale(d.value); });
// // console.log(bar1);
// var bar2 = bar.enter().append("rect")
// .attr("class", "bar2")
// // .attr("id","lesser")
// // .style("fill", "#ff7f0e")
// .attr("fill", "#ff7f0e")
// .attr("y", function(d,i) { return main_yScale(d.country); })
// .attr("height", main_yScale.rangeBand()/2)
// .attr("x", 0)
// .transition().duration(50)
// .attr("width", function(d) { return main_xScale(d.result); });
// console.log(bar2);
// var dwellTimeSecsEntered = $("#dwellTimeSecs").val();
// var lessValue = "value";
// var greaterValues = "result";
// var tip = d3.tip()
// .attr('class', 'd3-tip')
// .offset([10, 75])
// .html(function(d) {
// return "<strong>"+d.country+ " </strong><br>" +
// ""+lessValue+" :<span style='color:black'>" + d.result + "</span><br>"+greaterValues+": <span style='color:black'>" + d.value + "</span><br>";
// });
// bar.on('mouseover', tip.show)
// .on('mouseout', tip.hide);
// svg.call(tip);
// bar.exit()
// .remove();
}
function brushmove() {
var extent = brush.extent();
var selected = mini_yScale.domain()
.filter(function(d) { return (extent[0] - mini_yScale.rangeBand() + 1e-2 <= mini_yScale(d)) && (mini_yScale(d) <= extent[1] - 1e-2); });
d3.select(".miniGroup").selectAll(".bar")
.style("fill", "lightGrey");
d3.selectAll(".y.axis text")
.style("font-size", textScale(selected.length));
var originalRange = main_yZoom.range();
main_yZoom.domain( extent );
main_yScale.domain(data.map(function(d) { return d.country; }));
main_yScale.rangeBands( [ main_yZoom(originalRange[0]), main_yZoom(originalRange[1]) ], 0.4, 0);
d3.select(".mainGroup")
.select(".y.axis")
.call(main_yAxis);
// keep x-axis at the same scale independet of selected brush range
// var newMaxXScale = d3.max(data, function(d) { return selected.indexOf(d.country) > -1 ? d.value : 0; });
// main_xScale.domain([0, newMaxXScale]);
// can be moved to the init() call
d3.select(".mainGroupWrapper")
.select(".x.axis")
.transition().duration(50)
.call(main_xAxis);
update();
}
function brushcenter() {
var target = d3.event.target,
extent = brush.extent(),
size = extent[1] - extent[0],
range = mini_yScale.range(),
y0 = d3.min(range) + size / 2,
y1 = d3.max(range) + mini_yScale.rangeBand() - size / 2,
center = Math.max( y0, Math.min( y1, d3.mouse(target)[1] ) );
d3.event.stopPropagation();
gBrush
.call(brush.extent([center - size / 2, center + size / 2]))
.call(brush.event);
}
function scroll() {
var extent = brush.extent(),
size = extent[1] - extent[0],
range = mini_yScale.range(),
y0 = d3.min(range),
y1 = d3.max(range) + mini_yScale.rangeBand(),
dy = d3.event.deltaY,
topSection;
if ( extent[0] - dy < y0 ) { topSection = y0; }
else if ( extent[1] - dy > y1 ) { topSection = y1 - size; }
else { topSection = extent[0] - dy; }
d3.event.stopPropagation();
d3.event.preventDefault();
gBrush
.call(brush.extent([ topSection, topSection + size ]))
.call(brush.event);
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: block;
}
body {
font-size: 10px;
font-family: 'Open Sans', sans-serif;
font-weight: 400;
text-align: center;
}
#title {
font-size: 20px;
padding-bottom: 10px;
padding-top: 20px;
font-weight: 300;
}
#explanation {
font-size: 12px;
max-width: 620px;
margin: 0 auto;
padding-top: 10px;
color: #ababab;
font-weight: 300;
}
.brush .extent {
fill-opacity: .125;
shape-rendering: crispEdges;
}
.resize {
display: inline !important; /* show when empty */
fill: #7A7A7A;
fill-opacity: 1;
stroke: #7A7A7A;
stroke-width: 2px;
}
<script src="https://d3js.org/d3.v3.min.js"></script>
<body>
</body>

d3js scroll visibility - series animation for bar chart

I am working on a d3 application and I am interested in taking the following jsfiddle -- and onload or on an action -- revoking an animation where the bar charts animate one by one.
So the first bar animates to its height, then the second and so forth. Also a reversal of the animation would be good too -- so maybe something that is invoked automatically on scroll visibility?
http://jsfiddle.net/pg886/201/
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://d3js.org/d3.v4.min.js"></script>
<div
class="barchart"
data-role="barchart"
data-width=300
data-height=400
data-data="x"
data-configurations=""
>
</div>
<style>
.barchart{
/*width:100%;
border: 1px solid red;*/
}
.barchart svg{
width:100%;
/*border: 1px solid green;*/
}
.barchartg{
}
.barchart .axis path{
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.barchart .axis line {
fill: none;
stroke: none;
shape-rendering: crispEdges;
}
.barchart .x.axis path {
display: none;
}
.barchart .axis text{
fill: #005a70;
}
.barchart.dark .axis text{
fill: #ffffff;
}
.barchart.dark .axis path{
stroke: #ffffff;
}
.barchart .bar:hover {
fill: #e9168a;
}
</style>
<script>
$(document).ready(function() {
console.log("test")
var $this = $(".barchart");
var w = $this.data("width");
var h = $this.data("height");
var data = $this.data("data");
var data = [{
"label": "Apples",
"value": 100
},
{
"label": "Pears",
"value": 120
},
{
"label": "Bananas",
"value": 20
}];
var configurations = $this.data("configurations");
function colores_google(n) {
var colores_g = ["#f7b363", "#448875", "#2b2d39", "#c12f39", "#f8dd2f", "#1b91dc"];
return colores_g[n % colores_g.length];
}
//asess the margin bottom for the chart based on the max char label
var charLabelCount = [];
data.map(function(d) {
var labelStr = d.label.toString();
charLabelCount.push(labelStr.length);
})
var maxChars = charLabelCount.reduce(function(a, b) {
return Math.max(a, b);
});
var bottomMarg = 60;
if(maxChars > 15){
bottomMarg = 170;
}
//bottom margin calculation
var margin = {top: 15, right: 20, bottom: bottomMarg, left: 40},
width = w - margin.left - margin.right,
height = h - margin.top - margin.bottom;
var x = d3.scaleBand()
.rangeRound([0, width]).padding(0.1);
var y = d3.scaleLinear()
.range([height, 0]);
var xAxis = d3.axisBottom(x);
var yAxis = d3.axisLeft(y);
var svg = d3.select($this[0])
.append("svg")
.attr("width", w)
.attr("height", h)
.attr("viewBox", "0 0 "+w+" "+h)
.attr("preserveAspectRatio", "xMidYMid meet")
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
.attr("class", "barchartg");
function sortBy(array,key){
var sorted = array.sort(function(a, b) {
return parseFloat(b[key]) - parseFloat(a[key]);
});
return sorted;
}
var sortedMax = 45;//45 as an initial value
//if there is a configuration file - it acts as an overide -- this is so there could be just one chart -- or a set of charts next to each other
if(configurations){
//if its a comparison chart -- use a max value that will be shared amongst a stack of sibling charts
if(configurations[0]["maxValue"]){
sortedMax = configurations[0]["maxValue"] + 5;//add 5 value buffer
}
}
else{
//if its a stand alone chart - adjust the max val by this chart's own values
sortedMax = sortBy(data, "value")[0]["value"] + 5;//add 5 value buffer
}
x.domain(data.map(function(d) {
return d.label;
}));
y.domain([0, sortedMax]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.selectAll(".x.axis text")
.attr("transform", "rotate(-60) translate(-5,-5)")
.style("text-anchor", "end");
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("");
svg.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.attr("fill", function(d, i) {
return colores_google(i);
})
.attr("x", function(d) {
return x(d.label);
})
.attr("width", x.bandwidth())
.attr("y", function(d) {
return y(d.value);
})
.attr("height", function(d) {
return height - y(d.value);
});
});
</script>

Use .transition() to trigger animation to each rect.
But you have to start each rect with a height of zero and y of zero as well, so that you have something to work with in the animation.
$(document).ready(function() {
console.log("test")
var $this = $(".barchart");
var w = $this.data("width");
var h = $this.data("height");
var data = $this.data("data");
var data = [{
"label": "Apples",
"value": 100
},
{
"label": "Pears",
"value": 120
},
{
"label": "Bananas",
"value": 20
}
];
var configurations = $this.data("configurations");
function colores_google(n) {
var colores_g = ["#f7b363", "#448875", "#2b2d39", "#c12f39", "#f8dd2f", "#1b91dc"];
return colores_g[n % colores_g.length];
}
//asess the margin bottom for the chart based on the max char label
var charLabelCount = [];
data.map(function(d) {
var labelStr = d.label.toString();
charLabelCount.push(labelStr.length);
})
var maxChars = charLabelCount.reduce(function(a, b) {
return Math.max(a, b);
});
var bottomMarg = 60;
if (maxChars > 15) {
bottomMarg = 170;
}
//bottom margin calculation
var margin = {
top: 15,
right: 20,
bottom: bottomMarg,
left: 40
},
width = w - margin.left - margin.right,
height = h - margin.top - margin.bottom;
var x = d3.scaleBand()
.rangeRound([0, width]).padding(0.1);
var y = d3.scaleLinear()
.range([height, 0]);
var xAxis = d3.axisBottom(x);
var yAxis = d3.axisLeft(y);
var svg = d3.select($this[0])
.append("svg")
.attr("width", w)
.attr("height", h)
.attr("viewBox", "0 0 " + w + " " + h)
.attr("preserveAspectRatio", "xMidYMid meet")
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
.attr("class", "barchartg");
function sortBy(array, key) {
var sorted = array.sort(function(a, b) {
return parseFloat(b[key]) - parseFloat(a[key]);
});
return sorted;
}
var sortedMax = 45;
if (configurations) {
if (configurations[0]["maxValue"]) {
sortedMax = configurations[0]["maxValue"] + 5;
}
} else {
sortedMax = sortBy(data, "value")[0]["value"] + 5;
}
x.domain(data.map(function(d) {
return d.label;
}));
y.domain([0, sortedMax]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.selectAll(".x.axis text")
.attr("transform", "rotate(-60) translate(-5,-5)")
.style("text-anchor", "end");
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("");
svg.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.attr("fill", function(d, i) {
return colores_google(i);
})
.attr("x", function(d) {
return x(d.label);
})
.attr("width", x.bandwidth())
.attr("y", function(d) {
return y(0);
})
.attr("height", function(d) {
return 0
});
d3.selectAll("rect").transition()
.duration(500)
.delay(function(d,i){ return 500*i;})
.attr("height",function(d){ return height - y(d.value);})
.attr("y",function(d){return y(d.value);});
setTimeout(function(){
d3.selectAll("rect").transition()
.duration(500)
.delay(function(d,i){ return 600*(3-i);})
.attr("height",function(d){ return 0;})
.attr("y",function(d){return y(0);});
},2000);
});
.barchart {
/*width:100%;
border: 1px solid red;*/
}
.barchart svg {
width: 100%;
/*border: 1px solid green;*/
}
.barchartg {}
.barchart .axis path {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.barchart .axis line {
fill: none;
stroke: none;
shape-rendering: crispEdges;
}
.barchart .x.axis path {
display: none;
}
.barchart .axis text {
fill: #005a70;
}
.barchart.dark .axis text {
fill: #ffffff;
}
.barchart.dark .axis path {
stroke: #ffffff;
}
.barchart .bar:hover {
fill: #e9168a;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://d3js.org/d3.v4.min.js"></script>
<div class="barchart" data-role="barchart" data-width=300 data-height=400 data-data="x" data-configurations="">
</div>

you need to add transition for each bar while generating and delay the transion according to your wish.the code is as.
.transition()
.delay(function (d,i){ return i * 300;})
.duration(250)
the updated code with your code block is as follows
svg.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.transition()
.delay(function (d,i){ return i * 300;})
.duration(250)
.attr("fill", function(d, i) {
return colores_google(i);
})
.attr("x", function(d) {
return x(d.label);
})
.attr("width", x.bandwidth())
.attr("y", function(d) {
return y(d.value);
})
.attr("height", function(d) {
return height - y(d.value);
})

Paths not drawn after dragging in parallel coordinate in d3 V4

Here is a simple parallel coordinate in d3 V4
http://plnkr.co/edit/Ejg7CI7STPqXKB2tot51?p=preview
It is similar to https://bl.ocks.org/jasondavies/1341281 , which is in V3.
Following are the steps to reproduce the issue:
Step1. Brush some area (say 0.8 to 0.4) in column1....
Step2. Brush some area (say 0.7 to 0.4) in column3....
Step3. Now drag the axis column3 to the position of column2. (So basically axis ordering will get changed, from Column1, 2 , 3, 4 .. it will change to column1, 3 ,2, 4.
Step4. Brush column3 (which is now next to column1) again. You will see no paths are being drawn.
Any help would be appreciated.
Thanks
<!DOCTYPE html>
<meta charset="utf-8">
<style>
svg {
font: 10px sans-serif;
}
.background path {
fill: none;
stroke: #ddd;
stroke-opacity: .4;
shape-rendering: crispEdges;
}
.foreground path {
fill: none;
stroke: steelblue;
stroke-opacity: .7;
}
.brush .extent {
fill-opacity: .3;
stroke: #fff;
shape-rendering: crispEdges;
}
.axis line,
.axis path {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.axis text {
text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, 0 -1px 0 #fff, -1px 0 0 #fff;
cursor: move;
}
</style>
<body>
<script src="http://d3js.org/d3.v4.min.js"></script>
<script>
var margin = {top: 30, right: 10, bottom: 10, left: 10},
width = 600 - margin.left - margin.right,
height = 200 - margin.top - margin.bottom;
var x = d3.scalePoint().rangeRound([0, width]).padding(1),
y = {},
dragging = {};
var line = d3.line(),
//axis = d3.axisLeft(x),
background,
foreground,
extents;
var container = d3.select("body").append("div")
.attr("class", "parcoords")
.style("width", width + margin.left + margin.right + "px")
.style("height", height + margin.top + margin.bottom + "px");
var svg = container.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var quant_p = function(v){return (parseFloat(v) == v) || (v == "")};
d3.json("convertcsvSO.json", function(error, cars) {
dimensions = d3.keys(cars[0]);
x.domain(dimensions);
dimensions.forEach(function(d) {
var vals = cars.map(function(p) {return p[d];});
if (vals.every(quant_p)){
y[d] = d3.scaleLinear()
.domain(d3.extent(cars, function(p) {
return +p[d]; }))
.range([height, 0])
}
else{
vals.sort();
y[d] = d3.scalePoint()
.domain(vals.filter(function(v, i) {return vals.indexOf(v) == i;}))
.range([height, 0],1);
}
})
extents = dimensions.map(function(p) { return [0,0]; });
// Add grey background lines for context.
background = svg.append("g")
.attr("class", "background")
.selectAll("path")
.data(cars)
.enter().append("path")
.attr("d", path);
// Add blue foreground lines for focus.
foreground = svg.append("g")
.attr("class", "foreground")
.selectAll("path")
.data(cars)
.enter().append("path")
.attr("d", path);
// Add a group element for each dimension.
var g = svg.selectAll(".dimension")
.data(dimensions)
.enter().append("g")
.attr("class", "dimension")
.attr("transform", function(d) { return "translate(" + x(d) + ")"; })
.call(d3.drag()
.subject(function(d) { return {x: x(d)}; })
.on("start", function(d) {
dragging[d] = x(d);
background.attr("visibility", "hidden");
})
.on("drag", function(d) {
dragging[d] = Math.min(width, Math.max(0, d3.event.x));
foreground.attr("d", path);
dimensions.sort(function(a, b) { return position(a) - position(b); });
x.domain(dimensions);
g.attr("transform", function(d) { return "translate(" + position(d) + ")"; })
})
.on("end", function(d) {
delete dragging[d];
transition(d3.select(this)).attr("transform", "translate(" + x(d) + ")");
transition(foreground).attr("d", path);
background
.attr("d", path)
.transition()
.delay(500)
.duration(0)
.attr("visibility", null);
}));
// Add an axis and title.
var g = svg.selectAll(".dimension");
g.append("g")
.attr("class", "axis")
.each(function(d) { d3.select(this).call(d3.axisLeft(y[d]));})
//text does not show up because previous line breaks somehow
.append("text")
.attr("fill", "black")
.style("text-anchor", "middle")
.attr("y", -9)
.text(function(d) { return d; });
// Add and store a brush for each axis.
g.append("g")
.attr("class", "brush")
.each(function(d) {
if(y[d].name == 'r'){
// console.log(this);
d3.select(this).call(y[d].brush = d3.brushY().extent([[-8, 0], [8,height]]).on("start", brushstart).on("brush", brush_parallel_chart));
}
})
.selectAll("rect")
.attr("x", -8)
.attr("width", 16);
}); // closing
function position(d) {
var v = dragging[d];
return v == null ? x(d) : v;
}
function transition(g) {
return g.transition().duration(500);
}
// Returns the path for a given data point.
function path(d) {
return line(dimensions.map(function(p) { return [position(p), y[p](d[p])]; }));
}
// brush start function
function brushstart() {
d3.event.sourceEvent.stopPropagation();
}
// Handles a brush event, toggling the display of foreground lines.
function brush_parallel_chart() {
for(var i=0;i<dimensions.length;++i){
if(d3.event.target==y[dimensions[i]].brush) {
extents[i]=d3.event.selection.map(y[dimensions[i]].invert,y[dimensions[i]]);
}
}
foreground.style("display", function(d) {
return dimensions.every(function(p, i) {
if(extents[i][0]==0 && extents[i][0]==0) {
return true;
}
return extents[i][1] <= d[p] && d[p] <= extents[i][0];
}) ? null : "none";
});
}
</script>

In the drag callbacks, the dimensions are being sorted BUT the extents aren't. I've added a few lines that sorts extents array based on the new dimensions (by using origDimensions which is the original array)
Here's a fork of your plunkr: http://plnkr.co/edit/DquAXNv2mbbok7ssNuoX?p=preview
Relevant code:
var origDimensions = dimensions.slice(0);
And within the dragend callback:
// one way of sorting the extents array based on dimensions
var new_extents = [];
for(var i=0;i<dimensions.length;++i){
new_extents.push(extents[origDimensions.indexOf(dimensions[i])]);
}
extents = new_extents;
origDimensions = dimensions.slice(0); // setting origDimensions to the new array
Hope this helps. (and btw seems like the brushstart is empty which leads to showing NO curves on brush reset - try resetting brush on any axis).

D3 v4 Parallel Coordinate Plot Brush Selection

The parallel coordinate plot we are using and the data for the plot can be found here. This parallel coordinate plot does not work with version 4 of d3. We have made changes based on the API changes from v3 to v4. I think the main issue is in the brush function shown below.
function brush() {
let actives = dimensions.filter(function (p) {
return d3.brushSelection(y[p]) !== null;
});
console.log(actives);
let extents = actives.map(function (p) {
return d3.brushSelection(y[p]);
});
foreground.style("display", function (d) {
return actives.every(function (p, i) {
return extents[i][0] <= d[p] && d[p] <= extents[i][1];
}) ? null : "none";
});
}
The log shows "Array []" for actives. Currently we set each dimensions brush extent to be [[-8,0],[8,height]], which may be an issue as well. The full code is provided below.
<!DOCTYPE html>
<meta charset="utf-8">
<style>
svg {
font: 10px sans-serif;
}
.background path {
fill: none;
stroke: #ddd;
shape-rendering: crispEdges;
}
.foreground path {
fill: none;
stroke: steelblue;
}
.brush .extent {
fill-opacity: .3;
stroke: #fff;
shape-rendering: crispEdges;
}
.axis line,
.axis path {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.axis text {
text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, 0 -1px 0 #fff, -1px 0 0 #fff;
cursor: move;
}
</style>
<body>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
let margin = {top: 30, right: 10, bottom: 10, left: 10},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
let x = d3.scalePoint().range([0, width]).padding(1),
y = {},
dragging = {};
let line = d3.line(),
axis = d3.axisLeft(), //Argument for axisLeft? Compare to code on original plot
background,
foreground;
let svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
d3.csv("cars.csv", function (error, cars) {
// Extract the list of dimensions and create a scale for each.
x.domain(dimensions = d3.keys(cars[0]).filter(function (d) {
return d !== "name" && (y[d] = d3.scaleLinear()
.domain(d3.extent(cars, function (p) {
return +p[d];
}))
.range([height, 0]));
}));
// Add grey background lines for context.
background = svg.append("g")
.attr("class", "background")
.selectAll("path")
.data(cars)
.enter().append("path")
.attr("d", path);
// Add blue foreground lines for focus.
foreground = svg.append("g")
.attr("class", "foreground")
.selectAll("path")
.data(cars)
.enter().append("path")
.attr("d", path);
// Add a group element for each dimension.
let g = svg.selectAll(".dimension")
.data(dimensions)
.enter().append("g")
.attr("class", "dimension")
.attr("transform", function (d) {
return "translate(" + x(d) + ")";
})
.call(d3.drag()
.subject(function (d) {
return {x: x(d)};
})
.on("start", function (d) {
dragging[d] = x(d);
background.attr("visibility", "hidden");
})
.on("drag", function (d) {
dragging[d] = Math.min(width, Math.max(0, d3.event.x));
foreground.attr("d", path);
dimensions.sort(function (a, b) {
return position(a) - position(b);
});
x.domain(dimensions);
g.attr("transform", function (d) {
return "translate(" + position(d) + ")";
})
})
.on("end", function (d) {
delete dragging[d];
transition(d3.select(this)).attr("transform", "translate(" + x(d) + ")");
transition(foreground).attr("d", path);
background
.attr("d", path)
.transition()
.delay(500)
.duration(0)
.attr("visibility", null);
}));
// Add an axis and title.
g.append("g")
.attr("class", "axis")
.each(function (d) {
d3.select(this).call(axis.scale(y[d]));
})
.append("text")
.style("text-anchor", "middle")
.attr("y", -9)
.text(function (d) {
return d;
});
// Add and store a brush for each axis.
g.append("g")
.attr("class", "brush")
.each(function (d) {
d3.select(this).call(y[d].brush = d3.brushY().extent([[-8,0],[8,height]]).on("start", brushstart).on("brush", brush));
})
.selectAll("rect")
.attr("x", -8)
.attr("width", 16);
});
function position(d) {
let v = dragging[d];
return v == null ? x(d) : v;
}
function transition(g) {
return g.transition().duration(500);
}
// Returns the path for a given data point.
function path(d) {
return line(dimensions.map(function (p) {
return [position(p), y[p](d[p])];
}));
}
function brushstart() {
d3.event.sourceEvent.stopPropagation();
}
// Handles a brush event, toggling the display of foreground lines.
function brush() {
//return !y[p].brush.empty was the original return value.
let actives = dimensions.filter(function (p) {
return d3.brushSelection(y[p]) !== null;
});
console.log(actives);
let extents = actives.map(function (p) {
return d3.brushSelection(y[p]);
});
foreground.style("display", function (d) {
return actives.every(function (p, i) {
return extents[i][0] <= d[p] && d[p] <= extents[i][1];
}) ? null : "none";
});
}
</script>
If anyone is familiar with d3 and could offer any guidance it would be greatly appreciated. We also tried using d3.event.selection and y[p].brush.selection in the brush function.

I stumbled upon the exact same issue but managed to resolve it after below changes.
Add brush for each axis this way:
y[d] = d3.scaleLinear().domain(d3.extent(data, function(p) {
return +p[d];
})).range([height, 0]);
y[d].brush = d3.brushY()
.extent([[-8, y[d].range()[1]], [8, y[d].range()[0]]])
.on('brush', brush);
Subsequently, give above as the brush callback when adding the brush group:
g.append('g')
.attr('class', 'brush')
.each(function(d) {
d3.select(this).call(y[d].brush);
})
.selectAll('rect')
.attr('x', -8)
.attr('width', 16);
Finally, change the brush handler to be:
function brush() {
const actives = [];
// filter brushed extents
svg.selectAll('.brush')
.filter(function(d): any {
return d3.brushSelection(this as any);
})
.each(function(d) {
actives.push({
dimension: d,
extent: d3.brushSelection(this as any)
});
});
// set un-brushed foreground line disappear
foreground.style('display', function(d) {
return actives.every(function(active) {
const dim = active.dimension;
return active.extent[0] <= y[dim](d[dim]) && y[dim](d[dim]) <= active.extent[1];
}) ? null : 'none';
});
}
If above is confusing, see this standalone example that helped me with correctly brushing on parallel coordinates with d3 v4 : https://gist.github.com/kotomiDu/d1fd0fe9397db41f5f8ce1bfb92ad20d

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