Graphing Uploaded data in d3 - javascript

I am trying to use uploaded csv file data to be graphed using a d3. However I keep getting the error message that d3 isn't defined. Here's a sample of the code. The csv file is consists of 3 columns and 300 rows, separted by commas.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>A Plot</title>
<style>
</style>
<div id="plotA"></div>
<script src="http://d3js.org/d3.v3.js"></script>
<script>
var margin = {top: 20, right: 20, bottom: 30, left: 50},
width = 1000 - margin.left - margin.right,
height = 150 - margin.top - margin.bottom;
function Graph() {
var x = d3.scale.linear()
.range([0, width]);
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var line1 = d3.svg.line()
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.ECG); });
var svg1 = d3.select("#ecgplot").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("#fileinput", function(error, data) {
data.forEach(function(d) {
d.date = +d.tm;
d.A = +d.A;
d.B = +d.B;
});
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain(d3.extent(data, function(d) { return d.A; }));
svg1.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.append("text")
.attr("transform", "rotate(0)")
.attr("y", 28)
.attr("x", 450)
.attr("dx", ".71em")
.style("text-anchor", "end")
.text("Time (in second)");
svg1.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", -35)
.attr("x", -35)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("A");
function transition1(path1) {
var totalLength1 = path1.node().getTotalLength();
path1
.attr("stroke-dasharray", totalLength1 + " " + totalLength1)
.attr("stroke-dashoffset", totalLength1)
.transition()
.duration(25000)
.ease("linear")
.attr("stroke-dashoffset", 0)
.each("end", function() { d3.select(this).call(transition1); });
}
});
}//End of Graph Function
</script>
</head>
<body>
<form>
Select a file: <input type="file" accept=".csv" id="fileinput">
<input type="button" id="addButton" value="Add to CSV File" onclick="Graph()" />
</form>
</body>
</html>

I guess this could be fixed for now by adding a timeout for all your js code, as your d3 lib is loaded from cdn which may take few seconds.

Related

I can't load a javascript scatter plot in any browser

Recently, maybe after updating Java, I'm unable to load a scatter plot on Chrome, Firefox or Internet Explorer.
One month ago, everything loaded fine. I don't know what happened. I've updated Java to the last version and enabled ActiveX on Internet options, but nothing works for me.
I'll paste the html code. It loads the point info using a csv file saved in the same folder:
<!DOCTYPE html> <meta charset="utf-8"> <style>
body { font: 12px Arial;}
.axis path, .axis line { fill: none; stroke: grey; stroke-width: 1;
shape-rendering: crispEdges; }
</style> <body>
<script src="http://d3js.org/d3.v4.js"></script> <script>
// Set the dimensions of the canvas / graph var margin = {top: 30, right: 20, bottom: 50, left: 60}, width = 900 - margin.left - margin.right, height = 360 - margin.top - margin.bottom;
// Parse the date / time
var parseDate = d3.timeParse("%a %b %d %H:%M:%S %Z %Y "); // Set the ranges
var y = d3.scaleTime().range([height, 0]); var x = d3.scaleLinear().range([0, width]);
// Define the axes
var xAxis = d3.axisBottom().scale(x) .ticks(5);
var yAxis = d3.axisLeft().scale(y)
.ticks(5);
// Adds the svg canvas 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 + ")"); // Get the data
d3.csv("data.csv", function(error, data) { var max = data.length; console.log(max)
data.forEach(function(d, i) { d.dateParsed = parseDate(d.date); d.close = max - i;
}); // Scale the range of the data
y.domain(d3.extent(data, function(d) { return d.dateParsed; })); x.domain([0, d3.max(data, function(d) { return d.close; })]);
// Add the scatterplot svg.selectAll("dot") .data(data)
.enter().append("circle") .attr("r", 0.5)
.attr("fill","#2980B9")
.attr("cy", function(d) { return y(d.dateParsed); }) .attr("cx", function(d) { return x(d.close); });
svg.append("g") .attr("class", "x axis")
.attr("transform", "translate(0," + height + ")") .call(xAxis);
svg.append("text") .attr("class", "x label") .attr("text-anchor", "middle") .attr("x", width / 2) .attr("y", height + 40) .text("followers");
svg.append("g")
.attr("class", "y axis") .call(yAxis);
svg.append("text") .attr("class", "y label") .attr("text-anchor", "middle") .attr("x", -height / 2 ) .attr("y", -50)
.attr("transform", "rotate(-90)") .text("account creation date");
});
</script> </body>
It looks like main issue is code is not formatted properly.
Many comments get mixed with the code caused the syntax errors.
I try to format the code and try to fix those errors.
As we don't have your data.csv file so we are not able to load that data but code creates the chart now.
You can try to use this code on your side with your data.csv file. It will help you to load the chart properly.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
body { font: 12px Arial;}
.axis path, .axis line { fill: none; stroke: grey; stroke-width: 1;
shape-rendering: crispEdges; }
</style>
</head>
<body>
<script src="http://d3js.org/d3.v4.js"></script> <script>
// Set the dimensions of the canvas / graph
var margin = {top: 30, right: 20, bottom: 50, left: 60}, width = 900 - margin.left - margin.right, height = 360 - margin.top - margin.bottom;
// Parse the date / time
var parseDate = d3.timeParse("%a %b %d %H:%M:%S %Z %Y "); // Set the ranges
var y = d3.scaleTime().range([height, 0]); var x = d3.scaleLinear().range([0, width]);
// Define the axes
var xAxis = d3.axisBottom().scale(x) .ticks(5);
var yAxis = d3.axisLeft().scale(y)
.ticks(5);
// Adds the svg canvas
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 + ")"); // Get the data
d3.csv("data.csv", function(error, data) { var max = data.length;
console.log(max);
data.forEach(function(d, i) { d.dateParsed = parseDate(d.date); d.close = max - i;
});
// Scale the range of the data
y.domain(d3.extent(data, function(d) { return d.dateParsed; })); x.domain([0, d3.max(data, function(d) { return d.close; })]);
// Add the scatterplot
svg.selectAll("dot") .data(data)
.enter().append("circle") .attr("r", 0.5)
.attr("fill","#2980B9")
.attr("cy", function(d) { return y(d.dateParsed); }) .attr("cx", function(d) { return x(d.close); });
svg.append("g") .attr("class", "x axis")
.attr("transform", "translate(0," + height + ")") .call(xAxis);
svg.append("text") .attr("class", "x label") .attr("text-anchor", "middle") .attr("x", width / 2) .attr("y", height + 40) .text("followers");
svg.append("g")
.attr("class", "y axis") .call(yAxis);
svg.append("text") .attr("class", "y label") .attr("text-anchor", "middle") .attr("x", -height / 2 ) .attr("y", -50)
.attr("transform", "rotate(-90)") .text("account creation date");
});
</script>
</body>
</html>

JavaScript refresh file contents

I am having D3 JS load the contents of a file (which has CSV values). However the values in the file will change. Without refreshing the whole browser window, how can I get it to pull in the new data?
This is my code at the moment:
<!DOCTYPE html>
<meta charset="utf-8">
<body>
<script src="d3.v3.min.js"></script>
<script>
var margin = {top: 20, right: 20, bottom: 70, left: 40},
width = 600 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
// Parse the date / time
var parseDate = d3.time.format("%Y-%m").parse;
var x = d3.scale.ordinal().rangeRoundBands([0, width], .05);
var y = d3.scale.linear().range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.tickFormat(d3.time.format("%Y-%m"));
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.ticks(10);
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 + ")");
d3.csv("test2.csv", function(error, data) {
data.forEach(function(d) {
d.date = parseDate(d.date);
d.value = +d.value;
});
x.domain(data.map(function(d) { return d.date; }));
y.domain([0, d3.max(data, function(d) { return d.value; })]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", "-.55em")
.attr("transform", "rotate(-90)" );
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("Value ($)");
svg.selectAll("bar")
.data(data)
.enter().append("rect")
.style("fill", "steelblue")
.attr("x", function(d) { return x(d.date); })
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d.value); })
.attr("height", function(d) { return height - y(d.value); });
});
</script>
</body>
I think I might need to call data.forEach(function(d) again? But I've tried this:
<script>
var int=self.setInterval(data.forEach(function(d), 60000);
</script>
d3.csv() will pass file contents to it's callback at the time it is execution. It doesn't matter how many times you loop over the data inside the callback, it will be the same data that you are looping over.
To load the data again, you should call d3.csv() again which will call the callback with the new data.
See my example below (untested) when I have extracted the callback to a named function, and called d3.csv every minute.
<!DOCTYPE html>
<meta charset="utf-8">
<body>
<script src="d3.v3.min.js"></script>
<script>
var margin = {top: 20, right: 20, bottom: 70, left: 40},
width = 600 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
// Parse the date / time
var parseDate = d3.time.format("%Y-%m").parse;
var x = d3.scale.ordinal().rangeRoundBands([0, width], .05);
var y = d3.scale.linear().range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.tickFormat(d3.time.format("%Y-%m"));
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.ticks(10);
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 + ")");
// Created a reusable function for the callback
function handleCsvData(error, data) {
data.forEach(function(d) {
d.date = parseDate(d.date);
d.value = +d.value;
});
x.domain(data.map(function(d) { return d.date; }));
y.domain([0, d3.max(data, function(d) { return d.value; })]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", "-.55em")
.attr("transform", "rotate(-90)" );
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("Value ($)");
svg.selectAll("bar")
.data(data)
.enter().append("rect")
.style("fill", "steelblue")
.attr("x", function(d) { return x(d.date); })
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d.value); })
.attr("height", function(d) { return height - y(d.value); });
}
// Call d3.csv every minute and pass contents to callback
var csvReloadInterval = setInterval(d3.csv("test2.csv", handleCsvData), 60000);
// Call d3.csv for the first time
d3.csv("test2.csv", handleCsvData);
</script>
</body>
You have to call d3.csv() again to check for updates.
See here for an extended example:
http://bl.ocks.org/d3noob/6bd13f974d6516f3e491

How to make d3-diagram visualization from json-array working?

I have a problem with a d3 visualization (bar chart) that doesn't work.
Instead of loading the data from a CSV file like in the tutorials on the d3 page (https://bl.ocks.org/mbostock/3885304), I want it to load from a JSON-array.
Though I'm not sure why it doesn't seem like it loads at all. Can be something when I added the time parse, or placed the x.domain(data.map(function(d) { return d.date; })); outside a CSV load data snippet.
Thank you for your help!
<script type="text/javascript">
var data = [{date:"1999-06-23" ,value:1},{date:"1999-06-24" ,value:2},{date:"1999-06-28" ,value:3},{date:"1999-06-29" ,value:4},{date:"1999-06-30" ,value:5}];
var parseDate = d3.timeParse("%Y-%m-%d");
data.forEach(function(d) {
d.date = parseDate(d.date);
d.value = +d.value;
});
var xAxis = d3.axisBottom(x)
.tickFormat(d3.timeFormat("%Y-%m-%d"));
var yAxis = d3.axisLeft(y)
.ticks(10);
var svg = d3.select("#graph").append("svg")
.attr("width", 956)
.attr("height", 360)
margin = {top: 50, right: 100, bottom: 50, left: 50},
width = +svg.attr("width") - margin.left - margin.right,
height = +svg.attr("height") - margin.top - margin.bottom,
g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var x = d3.scaleBand().rangeRound([0, width]).paddingInner(0.05);
var y = d3.scaleLinear().range([height, 0]);
x.domain(data.map(function(d) { return d.date; }));
y.domain([0, d3.max(data, function(d) { return d.value; })]);
g.selectAll("bar")
.data(data)
.enter().append("rect")
.style("fill", "steelblue")
.attr("x", function (d) { return x(d.date); })
.attr("y", function (d) { return y(d.value); })
.attr("width", x.bandwidth())
.attr("height", function(d) { return height - y(d.value); });
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", "-.55em")
.attr("transform", "rotate(-90)" );
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("Value ($)");
</script>
.axis {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.0.0/d3.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="style.css">
</head>
<body>
<script src="script.js"></script>
</body>
</html>
The list of the problems:
Your reference to D3 is v3. However, your code uses v4.
You are defining the axes generators before defining the scales.
You are not translating the axes.
Besides that, there is no such a thing as "JSON array". That's just an array. You probably meant hardcoded data
Here is the working code:
var data = [{
date: "1999-06-23",
value: 1
}, {
date: "1999-06-24",
value: 2
}, {
date: "1999-06-28",
value: 3
}, {
date: "1999-06-29",
value: 4
}, {
date: "1999-06-30",
value: 5
}];
var parseDate = d3.timeParse("%Y-%m-%d");
data.forEach(function(d) {
d.date = parseDate(d.date);
d.value = +d.value;
});
var svg = d3.select("body").append("svg")
.attr("width", 956)
.attr("height", 360);
var margin = {
top: 50,
right: 100,
bottom: 50,
left: 50
},
width = +svg.attr("width") - margin.left - margin.right,
height = +svg.attr("height") - margin.top - margin.bottom;
g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var x = d3.scaleBand().rangeRound([0, width]).paddingInner(0.05);
var y = d3.scaleLinear().range([height, 0]);
x.domain(data.map(function(d) {
return d.date;
}));
y.domain([0, d3.max(data, function(d) {
return d.value;
})]);
var xAxis = d3.axisBottom(x)
.tickFormat(d3.timeFormat("%Y-%m-%d"));
var yAxis = d3.axisLeft(y)
.ticks(10);
g.selectAll("bar")
.data(data)
.enter().append("rect")
.style("fill", "steelblue")
.attr("x", function(d) {
return x(d.date);
})
.attr("y", function(d) {
return y(d.value);
})
.attr("width", x.bandwidth())
.attr("height", function(d) {
return height - y(d.value);
});
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(" + margin.left + "," + (height + margin.bottom) + ")")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", "-.55em")
.attr("transform", "rotate(-90)");
svg.append("g")
.attr("class", "y axis")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Value ($)");
<script src="https://d3js.org/d3.v4.min.js"></script>

Aligning two graphs(Pie and Bar) side by side :: d3 js

I am a little new to D3 js.I need to align two graphs (bar and pie) side by side which will be displayed on a dashboard.When I use individual .html files for bar and pie charts,they work perfectly but the charts are getting overlapped when I combine them into a single .html file.
I have tried changing different parameters related to "svg" and corresponding x and y axes but to no avail.
There are two csv files(pie-data.csv,bar-data.csv) from where data will be picked.
Below is my code ::
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.arc text {
font: 10px sans-serif;
text-anchor: middle;
}
.arc path {
stroke: #fff;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>
var width = 500,
height = 500,
radius = Math.min(width, height) / 2;
var color = d3.scale.ordinal()
.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);
var arc = d3.svg.arc()
.outerRadius(radius - 10)
.innerRadius(0);
var labelArc = d3.svg.arc()
.outerRadius(radius - 40)
.innerRadius(radius - 40);
var pie = d3.layout.pie()
.sort(null)
.value(function(d) { return d.ticket_count; });
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
d3.csv("pie-data.csv", type, function(error, data) {
if (error) throw error;
var g = svg.selectAll(".arc")
.data(pie(data))
.enter().append("g")
.attr("class", "arc");
g.append("path")
.attr("d", arc)
.style("fill", function(d) { return color(d.data.ticket_meter); });
g.append("text")
.attr("transform", function(d) { return "translate(" + labelArc.centroid(d) + ")"; })
.attr("dy", ".35em")
.text(function(d) { return d.data.ticket_meter; });
});
function type(d) {
d.ticket_count = +d.ticket_count;
return d;
}
////////////////////////////////////////////////
var margin = {top: 20, right: 20, bottom: 70, left: 40},
width = 150 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
var x = d3.scale.ordinal().rangeRoundBands([0, width], .05);
var y = d3.scale.linear().range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.ticks(10);
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 + ")");
d3.csv("bar-data.csv", function(error, data) {
data.forEach(function(d) {
d.issue_status = d.issue_status;
d.issue_count = +d.issue_count;
});
x.domain(data.map(function(d) { return d.issue_status; }));
y.domain([0, d3.max(data, function(d) { return d.issue_count; })]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", "-.55em")
.attr("transform", "rotate(-90)" );
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")
svg.selectAll("bar")
.data(data)
.enter().append("rect")
.style("fill", "steelblue")
.attr("x", function(d) { return x(d.issue_status); })
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d.issue_count); })
.attr("height", function(d) { return height - y(d.issue_count); });
});
</script>
</body>
</html>
Please suggest any pointers so that alignment can be done.Thanks in advance.
You are using the same variable twice:
var svg = d3.select("body").append("svg");
(and, besides that one, you are repeating some other variables that should be unique)
Appending the SVGs to the "body" is not the correct way, because when you append an SVG to the body the SVG is put at the end of the page, and you'll not be able to position them side by side.
A solution would be creating one div for each chart, with IDs #chart1 and #chart2 for instance, and then creating two variables:
var svg1 = d3.select("#chart1").append("svg");
And
var svg2 = d3.select("#chart2").append("svg");
Don't forget to change all other variables accordingly.
After the changes, use CSS to align the two divs side by side.

D3 - To add Data Labels to a simple bar chart

I know this is easy and I saw some examples in this forum as well as other websites as well, but I simple can't figure it out.
I'm new in using D3 library to generate the charts. I'm trying to learn by creating bar chart.
My question is how to add the Data Labels into the chart?
Below is the codes I have.
then I have my JS:
var chartwidth = 800;
var chartheight = 600;
var data = [
{"Start_Dt":"Jan 15","UnitName":"Unit 1","ProgramName":"ProgramName 1","AttendCnt":159,"NewcomerCnt":10}
, {"Start_Dt":"Jan 22","UnitName":"Unit 2","ProgramName":"ProgramName 2","AttendCnt":178,"NewcomerCnt":5}
, {"Start_Dt":"Feb 14","UnitName":"Unit 2","ProgramName":"ProgramName 3","AttendCnt":240,"NewcomerCnt":46}
, {"Start_Dt":"Feb 19","UnitName":"Unit 1","ProgramName":"ProgramName 4","AttendCnt":201,"NewcomerCnt":10}
, {"Start_Dt":"Feb 26","UnitName":"Unit 2","ProgramName":"ProgramName 5","AttendCnt":177,"NewcomerCnt":7}
, {"Start_Dt":"Mar 12","UnitName":"Unit N","ProgramName":"ProgramName N","AttendCnt":184,"NewcomerCnt":3}
];
var margin = {top: 20, right: 20, bottom: 300, left: 40},
width = chartwidth - margin.left - margin.right,
height = chartheight - margin.top - margin.bottom;
var formatPercent = d3.format(".0%");
var formatTime = d3.time.format("%e %B");
var x = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var x2 = d3.scale.ordinal()
.rangeBands([0, width], 0);
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var svg = d3.select(".chart").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 + ")");
data.forEach(function(d) {
d.AttendCnt = +d.AttendCnt;
});
x.domain(data.map(function(d) { return d.Start_Dt + " " + d.ProgramName; }));
y.domain([0, d3.max(data, function(d) { return d.AttendCnt; })]);
//Create X Axis
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", ".15em")
.attr("transform", "rotate(-65)" )
.append("text")
.attr("y", 25)
.attr("x",x.rangeBand()/2 )
.style("text-anchor", "middle")
.style("font-size", "20px")
.style("color", "black")
.text(function(d,i) { return "xxx"; });
//Create Y Axis
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 0)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Attendance");
svg.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) { return x(d.Start_Dt + " " + d.ProgramName); })
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d.AttendCnt); })
.attr("height", function(d) { return height - y(d.AttendCnt); });
Before
After
How to modify the codes to get the result I wanted? Tks
i haven't tested the code but it could be something like this :
svg.selectAll(".barText")
.data(data)
.enter().append("text")
.attr("class", "barText")
.attr("x", function(d) { return x(d.Start_Dt + " " + d.ProgramName); })
.attr("y", function(d) { return height - y(d.AttendCnt); })
.text(function(d) { return d.AttendCnt; })
;
Hope it helps

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