Develop Reference

How to show stacked and unstacked bar graphs together in Chart.js

We are trying to display three sets of data, two stacked, one unstacked using chart.js. We defined two sets of axis where only the stacked data shows and the unstacked data does not. We can only get the axis to display or not display, but we cannot get the data to appear at all.
We know the data is valid because we can get all of the data to stack together, but not separately.
recycleChartData = {
"type":"bar",
"data":{
"labels":["Mar-2016"],
"datasets":[
{
"label":"benchmark",
"backgroundColor":"#ff3300",
"yAxisID":"stacked_testY2",
"xAxisID":"stacked_testX2",
"data":["2632.29"]
},
{
"label":"Crossville",
"backgroundColor":"#009900",
"yAxisID":"stacked_testY",
"xAxisID":"stacked_testX",
"data":["2268.44"]
},
{
"label":"test",
"backgroundColor":"#ffff00",
"yAxisID":"stacked_testY",
"xAxisID":"stacked_testX",
"data":["181.92"]
}
]
},
"options":{
"scales":{
"yAxes":[
{
"id":"stacked_testY",
"position":"left",
"stacked":true,
"display":true
},
{
"id":"stacked_testY2",
"position":"left",
"stacked":false,
"display":false
}
],
"xAxes":[
{
"id":"stacked_testX",
"position":"bottom",
"stacked":true,
"display":true
},
{
"id":"stacked_testX2",
"position":"bottom",
"stacked":false,
"display":false
}
]
}
}
};

It's odd that your code doesn't work, if you change the non-stacked dataSet to a line graph you see the data! Maybe worth posting an issue on the chartjs github.
But...
There was a feature released in 2.5.0 which will allow for this sort of scenario. More on what it is can be read here, https://github.com/chartjs/Chart.js/issues/2643.
Basically, you can add a new property stack on each of your dataSets to denote which stack you would like it to go on to, so for example with your data you could remove the extra scales and have 2 stacks
var config = {
"type": "bar",
"data": {
"labels": ["Mar-2016","Apr-2016"],
"datasets": [ {
"label": "Crossville",
"backgroundColor": "#009900",
"data": ["2268.44","2268"],
stack: 2,
}, {
"label": "test",
"backgroundColor": "#ffff00",
"data": ["181.92","181.92"],
stack: 2
},{
"label": "benchmark",
"type": "bar",
"backgroundColor": "#ff3300",
"data": ["2632.29","2632.29"],
stack: 1
}]
},
"options": {
"scales": {
"yAxes": [{
"id": "stacked_testY",
"type": 'linear',
"position": "left",
"stacked": true,
"display": true
}],
"xAxes": [{
"position": "bottom",
"stacked": true,
"display": true
}]
}
}
};
var chartElement = document.getElementById('chart');
var chart = new Chart(chartElement, config);
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.min.js"></script>
<div style="width:75%;">
<canvas id="chart"></canvas>
</div>

I came across this issue when trying to find out how to stack specific datasets of a line diagram in Chart.js v2.x.
Chart.js v3.x supports the stack attribute for line diagrams but in Chart.js v2.x:
you have to use multiple y-axis
to align the values you need to calculate the maximal value yourself and set ticks.max or ticks.suggestedMax in the axis configuration.
false console:
let yMax = 3000; // Calculate value beforehand.
var config = {
"type": "line",
"data": {
"labels": ["Mar-2016","Apr-2016","May-2016"],
"datasets": [ {
"label": "Crossville",
"backgroundColor": "#009900",
"data": ["2268.44","2268","31"]
}, {
"label": "test",
"borderColor": "#ffff00",
"data": ["181.92","181.92", "1000"],
"yAxis": 'A'
},{
"label": "benchmark",
"backgroundColor": "#ff3300",
"data": ["2632.29","2632.29","500"]
}]
},
"options": {
"scales": {
"yAxes": [
{
"id": "A",
ticks: {
beginAtZero: true,
display: true,
suggestedMax: yMax
},
},
{
"stacked": true,
"ticks": {
beginAtZero: true,
display: true, // Set this to false so that only one axis is shown!!!
suggestedMax: yMax
},
},
],
"xAxes": [{
"position": "bottom",
"stacked": true,
"display": true
}]
}
}
};
var chartElement = document.getElementById('chart');
var chart = new Chart(chartElement, config);
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.min.js"></script>
<div style="width:75%;">
<canvas id="chart"></canvas>
</div>

Bar Chart slow zoom In/out - AmCharts

While zooming my Bar amchart is rendering very slow when data is large, that is, 2975 points. Although, rendering is fine but it is lagging while zooming in/out using drag icon. The code is as below:
for(var i=0; i<title.length; i++) {
var graphElem = {
"title":title[i],
"valueField":valueFields[i],
"valueAxis":"v1",
"type": "column",
"fillAlphas": 0.8,
"lineAlpha": 0.2
};
graph.push(graphElem);
}
var chart = AmCharts.makeChart(graphType, {
"type": "serial",
"theme": "light",
"pathToImages": "/grm/images/",
"legend": {
"equalWidths": false,
"position": "bottom",
"spacing": 3,
"markerSize":8,
},
"dataProvider": dataProvider,
"valueAxes": [ {
"id":"v1",
"axisThickness": 1,
"gridAlpha": 0,
"axisAlpha": 1,
"position": "left",
"integersOnly" : true
} ],
"columnSpacing" : 0,
"graphs": graph,
"chartScrollbar": {
"dragIconHeight" : 25,
"dragIconWidth" : 25
},
"chartCursor": {
"cursorAlpha": 0,
"cursorPosition": "mouse",
"categoryBalloonDateFormat": "MMM DD, YYYY JJ:NN"
},
"categoryField": "linkTimestamp",
"categoryAxis": {
"parseDates": true,
"axisColor": "#000000",
"minPeriod": "mm"
},
"dataDateFormat": "YYYY-MM-DD HH:NN:SS"
} );
chart.addListener("dataUpdated", zoomChart);
zoomChart();
function zoomChart(){
chart.zoomToIndexes(chart.dataProvider.length - 20, chart.dataProvider.length - 1);
}
if i use graph other than the bar(column) chart, zoom in/out is fast but it is lagging only in case of "type": "column". Please help where am i making mistake. Thanks

Try to only allow the re-rendering to happen after the zoom by setting updateOnReleaseOnly to true.

Try to remove animations, it worked for me.

Showing percentage on bar graph in amcharts

I am newbie in Amcharts and I am trying to show the percentage of the data in the column graph.
var amc=AmCharts.makeChart("pickup_bar",
{
"type": "serial",
"dataLoader": {
"url": "the data url"
},
"categoryField": "distance",
"startDuration": 1,
"categoryAxis": {
"gridPosition": "start"
},
"trendLines": [],
"graphs": [
{
"valueField": "taxi",
"fillColors":"#1E90FF",
"type": "column",
"balloonText": "[[title]] of [[category]]:[[value]]",
"fillAlphas": 0.8,
"lineAlpha": 0.2,
"id": "AmGraph-1",
"title": "Distance Traveled",
"labelText": " ",
"labelPosition": "inside",
"labelFunction": function( item ) {
var total = 0;
for ( var i = 0; i < chart.dataLoader.length; i++ ) {
total += chart.dataLoader[ i ][ item.graph.valueField ];
}
var percent = Math.round( ( item.values.value / total ) * 1000 ) / 10;
return percent + "%";
}
}],
"guides": [],
"valueAxes": [
{
"id": "ValueAxis-1",
"title": "Milage",
"gridColor": "#FFFFFF",
"gridAlpha": 0.2
}
],
"categoryAxis": {
"title": "(in Kilometers)"
},
"gridAboveGraphs": true,
"allLabels": [],
"balloon": {},
"legend": {
"enabled": true,
"useGraphSettings": true
},
"titles": [
{
"id": "Title-1",
"size": 15,
"text": "Taxis Driving Distance "
}
]
});
The data format is json and will be as
> [{"distance":"<50","taxi":309,"day":1},{"distance":"50-100","taxi":100,"day":1},{"distance":"100-200","taxi":300,"day":1},...]
The chart is load even loading but when I remove the line
"labelPosition": "inside",
The graph appears but not the percentage.
Can Anyone help in this?

There are a couple of issues in your code.
Firstly, you're accessing an undefined chart variable. Your code is assigning the chart object to amc. You'll want to change your code to match, or access the chart instance through item.graph.chart.
Secondly, you're looping through the dataLoader in your labelFunction instead of the dataProvider. The dataLoader object doesn't store your chart data, it just loads data into your chart's dataLoader after it retrieves it from the specified URL. Here's your fixed labelFunction:
"labelFunction": function(item) {
var total = 0;
var chart = item.graph.chart;
for (var i = 0; i < chart.dataProvider.length; i++) {
total += chart.dataProvider[i][item.graph.valueField];
}
var percent = Math.round((item.values.value / total) * 1000) / 10;
return percent + "%";
}
The labels display for me with your data after I made these changes. If you're still not seeing the labels, perhaps you have a lot of data in a limited space. By default, the chart won't render graph value labels if it can't fit them. If you want to override this behavior, set the graph's showAllValueLabels property to true.
Demo

Change function to use as onchange event

I have the following javascript function for listbox organization:
$("#organization").change(function(e) {
//function updateOrganization() {
organization = $("#organization").val();
indicator = $("#indicators").val();
funcid = "fill_chart_average_score";
//console.log('changed');
$.getJSON('functions/getfunctions.php', {
"organization":organization,
"indicator":indicator,
"funcid":funcid},
function(dataChart) {
var chart = AmCharts.makeChart("chartaveragescore", {
"theme": "light",
"type": "serial",
"startDuration": 1,
"dataProvider": dataChart,
"rotate": false,
"categoryField": "organisatie",
"valueAxes": [ {
"gridColor": "#FFFFF",
"gridAlpha": 0.2,
"dashLength": 0
} ],
"gridAboveGraphs": true,
"startDuration": 1,
"graphs": [ {
"balloonText": "[[category]]: <b>[[value]]</b>",
"fillColorsField": "fillcolor", //Dit veld heb ik meegegeven vanuit SQL functie en bevat de HEX kleurcodes BD
"fillAlphas": 0.8,
"lineAlpha": 0.2,
"type": "column",
"valueField": "score"
} ],
"chartCursor": {
"categoryBalloonEnabled": false,
"cursorAlpha": 0,
"zoomable": false
},
"categoryAxis": {
"gridPosition": "start",
"gridAlpha": 0,
"tickPosition": "start",
"tickLength": 20
},
"export": {
"enabled": true
}
},0);
$('.chart-input').off().on('input change',function() {
var property = jQuery(this).data('property');
var target = chart;
chart.startDuration = 0;
});
});
});
This works great, but what i want now is to make a function not based on $("#organization").change(function(e) but just make a function like function updateOrganization() and call this function in an onchange within the html element. When i change the $("#organization").change(function(e) with function updateOrganization() the function doesn't work anymore.
I'm a starting javascript learner :).

I think you want to call function on change of dropdown and you want to do it with onchange event of select tag. This might help you.

You should declare your function outside the block. Something like:
function updateOrganization() {
organization = $("#organization").val();
indicator = $("#indicators").val();
funcid = "fill_chart_average_score";
// ...
}
and then use it as:
$("#organization").change(updateOrganization);

How do I make stacked bar chart on amcharts interactive?

I have written some code in amcharts.js to create stacked bar charts (with data as a parameter) and a pie chart.
The code can be found here:
http://jsfiddle.net/akashdmukherjee/myd363tw/30/
HTML:
<script type="text/javascript" src="http://www.amcharts.com/lib/3/amcharts.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/serial.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/pie.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/themes/none.js"></script>
<div id="chartdiv"></div>
CSS:
#chartdiv {
width : 100%;
height : 500px;
font-size : 11px;
}
JS:
var year_wise_continent_breakdown_data =
[
{"year": 2003,"europe": 2.5,"namerica": 2.5,"asia": 2.1,"lamerica": 0.3,"meast":0.2,"africa": 0.1},
{"year": 2004,"europe": 2.6,"namerica": 2.7,"asia": 2.2,"lamerica": 0.3,"meast": 0.3,"africa": 0.1}
, {"year": 2005,"europe": 2.8,"namerica": 2.9,"asia": 2.4,"lamerica": 0.3,"meast": 0.3,"africa": 0.1}
];
var quarter_wise_continent_breakdown_data_for_2003 =
[
{"year": "Q1","europe": 0.5,"namerica": 2.1,"asia": 1.1,"lamerica": 0.3,"meast":0.2,"africa": 0.1},
{"year": "Q2","europe": 2.6,"namerica": 2.7,"asia": 3.2,"lamerica": 0.3,"meast": 0.3,"africa": 0.1}
, {"year": "Q3","europe": 2.8,"namerica": 1.7,"asia": 1.4,"lamerica": 1.3,"meast": 1.3,"africa": 2.1}
];
var quarter_wise_continent_breakdown_data_for_2004 =
[
{"year": "Q1","europe": 1.5,"namerica": 2.1,"asia": 1.1,"lamerica": 0.3,"meast":0.2,"africa": 0.1},
{"year": "Q2","europe": 4.6,"namerica": 2.7,"asia": 3.2,"lamerica": 0.3,"meast": 0.3,"africa": 0.1}
, {"year": "Q3","europe": 5.8,"namerica": 1.7,"asia": 1.4,"lamerica": 1.3,"meast": 1.3,"africa": 2.1}
];
var quarter_wise_continent_breakdown_data_for_2005 =
[
{"year": "Q1","europe": 3.9,"namerica": 2.1,"asia": 1.1,"lamerica": 0.3,"meast":0.2,"africa": 0.1},
{"year": "Q2","europe": 2.1,"namerica": 2.7,"asia": 3.2,"lamerica": 0.3,"meast": 0.3,"africa": 0.1}
, {"year": "Q3","europe": 0.8,"namerica": 1.7,"asia": 1.4,"lamerica": 1.3,"meast": 1.3,"africa": 2.1}
];
var continent_breakdown_data = [
{"country": "UK", "litres": 99},
{"country": "Belgium","litres": 60},
{ "country": "The Netherlands","litres": 50}
];
var make_pieChart_from_continent_breakdown_data = function(selected_year, selected_region){
AmCharts.makeChart("chartdiv", {
"type": "pie",
"theme": "none",
"dataProvider": continent_breakdown_data,
"valueField": "litres",
"titleField": "country",
"exportConfig":{
menuItems: [{
icon: '/lib/3/images/export.png',
format: 'png'
}]
}
});
};
var make_stackedBars_chart = function(data_for_stackedBars_chart){
AmCharts.makeChart("chartdiv", {
"type": "serial",
"theme": "none",
"legend": {
"horizontalGap": 10,
"maxColumns": 1,
"position": "right",
"useGraphSettings": true,
"markerSize": 10
},
"dataProvider": data_for_stackedBars_chart,
"valueAxes": [{
"stackType": "regular",
"axisAlpha": 0.3,
"gridAlpha": 0
}],
"graphs": [{
"balloonText": "<b>[[title]]</b><br><span style='font-size:14px'>[[category]]: <b>[[value]]</b></span>",
"fillAlphas": 0.8,
"labelText": "[[value]]",
"lineAlpha": 0.3,
"title": "Europe",
"type": "column",
"fillColors": "#3C3C3C",
"valueField": "europe"
}, {
"balloonText": "<b>[[title]]</b><br><span style='font-size:14px'>[[category]]: <b>[[value]]</b></span>",
"fillAlphas": 0.8,
"labelText": "[[value]]",
"lineAlpha": 0.3,
"title": "North America",
"type": "column",
"color": "#000000",
"valueField": "namerica"
}, {
"balloonText": "<b>[[title]]</b><br><span style='font-size:14px'>[[category]]: <b>[[value]]</b></span>",
"fillAlphas": 0.8,
"labelText": "[[value]]",
"lineAlpha": 0.3,
"title": "Asia-Pacific",
"type": "column",
"color": "#000000",
"valueField": "asia"
}, {
"balloonText": "<b>[[title]]</b><br><span style='font-size:14px'>[[category]]: <b>[[value]]</b></span>",
"fillAlphas": 0.8,
"labelText": "[[value]]",
"lineAlpha": 0.3,
"title": "Latin America",
"type": "column",
"color": "#000000",
"valueField": "lamerica"
}, {
"balloonText": "<b>[[title]]</b><br><span style='font-size:14px'>[[category]]: <b>[[value]]</b></span>",
"fillAlphas": 0.8,
"labelText": "[[value]]",
"lineAlpha": 0.3,
"title": "Middle-East",
"type": "column",
"color": "#000000",
"valueField": "meast"
}, {
"balloonText": "<b>[[title]]</b><br><span style='font-size:14px'>[[category]]: <b>[[value]]</b></span>",
"fillAlphas": 0.8,
"labelText": "[[value]]",
"lineAlpha": 0.3,
"title": "Africa",
"type": "column",
"color": "#000000",
"valueField": "africa"
}],
"categoryField": "year",
"categoryAxis": {
"gridPosition": "start",
"axisAlpha": 0,
"gridAlpha": 0,
"position": "left"
},
"exportConfig":{
"menuTop":"20px",
"menuRight":"20px",
"menuItems": [{
"icon": '/lib/3/images/export.png',
"format": 'png'
}]
}
})
};
//****************************************************************************
// RENDER CHARTS
//****************************************************************************
make_stackedBars_chart(year_wise_continent_breakdown_data);
////make_pieChart_from_continent_breakdown_data(2005, "Asia-Pacific");
If you notice, I create stacked bar charts using make_stackedBars_chart() function by passing in data. From my code, there are four options I can pass as data for the stacked bar chart:
1. year_wise_continent_breakdown_data
2. quarter_wise_continent_breakdown_data_for_2003
3. quarter_wise_continent_breakdown_data_for_2004
4. quarter_wise_continent_breakdown_data_for_2003
I could also create a pie chart instead using the function make_pieChart_from_continent_breakdown_data(selected_year, selected_region). The pie chart, for simplicity here, uses only one piece of data that's defined as the continent_breakdown_data variable.
The first view that an user of this 'dashboard' would see is the year-wise trends broken down by continents. This is the page that's renders when you open the jsfiddle link. This is made possible by a function call make_stackedBars_chart(year_wise_continent_breakdown_data);
But now is the fun part.
How do I make this interactive?
Let's start with the first view.
When the user single-clicks on the first column (data for year 2003), or second column (data for year 2004), or third column (data for year 2005), I want the selected column to be highlighted in Grey. Something like this.
My hope is that this can be set by setting the fillColors attribute of the graph object in the function. But how?
Next, when the user double-clicks on the selected column, the user should be able to drill-down to a new stacked bar chart which shows category breakdown but trending over Quarters of the selected year. So, let's say the user selected year 2005. When they single-clicked, it turned grey. After single-clicking or before single-clicking, if they double-click the year 2005 column, a new stacked bar chart is loaded with an additional button on top to go back to the previous chart. My understanding is that this needs to be done using a function call of make_stackedBars_chart(quarter_wise_continent_breakdown_data_for_2005);
This should look something like this:
Once this, is done user should be able to click on the top button to go back from there to the old chart into this view.
Fine. So the user saw year-wise view and quarter-wise view. But, now they want to select only one category (Asia-Pacific region) of year 2005 and see some other data specific to that. Selecting any portion on the chart should first collect the category (region/continent in this case) they have selected and the year they have selected. The selected region should be colored grey on a single click.
On a double click before/after the single-click on this portion of Asia-Pacific in 2005, this information should be passed onto a function that creates a pie chart accordingly. For this, a function call of this could be made
make_pieChart_from_continent_breakdown_data(2005, "Asia-Pacific"); The resultant graph should also have a button on top to go back to the original view. It should look something like this.
Clicking on 'Go Back', they should be redirected to the original year-wise stacked bar chart.

You should follow this example on drill down data: http://www.amcharts.com/tutorials/drill-down-column-chart/
Key points: generate data of quarter data as subdata for the yeardata and attach a click event to the chart to catch clicks on the bar to open next level.
Structure is like this:
data = [{country : "Country1", data1 : "value1", data2 : "value2",
subdata [{ country : "Country1", data1.1 : "value1.1", data2.1 : "data2.1"},
{country : "Country1", data1.2 : "value1.2", data2.2 : "data2.2"}]}]
and click event:
chart.addListener("clickGraphItem", function (event) {
if (event.item.dataContext.subdata != undefined) {
event.chart.dataProvider = event.item.dataContext.subdata;
event.chart.validateData();
}
});
This example shows how to change chart types onclick: http://www.amcharts.com/tips/switching-chart-type-fly-serial-pie/
Relevant points: You can have other type of chart on screen hidden, and onclick makes you change between charts:
document.getElementById('chartdiv').style.display = 'none';
document.getElementById('chartdiv2').style.display = 'block';
For double click, catch the following event: http://www.amcharts.com/tips/simulate-doubleclick-map-object/
Pointers:
map.addListener("clickMapObject", function (event) {
if ( false !== map.clickedObject && map.clickedObject === event.mapObject ) {
// doubleckick
map.clickedObject = false;
alert('doubleclick');
} else {
clearTimeout( map.clickedObjectTimeout );
map.clickedObject = event.mapObject;
map.clickedObjectTimeout = setTimeout( function () {
map.clickedObject = false;
}, 500 );
}
});
Final notes: These are some pointers where you have to make the solution by your own. Markups are taken (almost) directly from the linked examples, so event/element names will vary on your need. Maybe you at least get started with these.