I am creating 5 sections of gauge using chartjs-gauge. I am using the following data.
[150,200,250,300,400]
From this data, I want to display the circumference until 300. But the angle should calculated by including the last section value too. I had custom the text showing in section by setting it to empty string if more than 300. For section colour, I set 4 colours["green", "yellow", "orange", "red"]. Now, last section showing as silver colour which is default background of gauge. I have add rgba(0,0,0,0) to colour array ["green", "yellow", "orange", "red","rgba(0,0,0,0)"] which will show transparent colour for last section. But, when hover on section, it is responsive showing border. I would like to know if have other way to show the circumference until certain value from our data ,but calculating section area in chart using all value from data.
var data = [150, 200, 250, 300, 400];
var config = {
type: "gauge",
data: {
labels: ['Success', 'Warning', 'Warning', 'Error'],
datasets: [{
data: data,
value: 300,
backgroundColor: ["green", "yellow", "orange", "red"],
borderWidth: 2
}]
},
options: {
responsive: true,
title: {
display: true,
text: "Gauge chart with datalabels plugin"
},
layout: {
padding: {
bottom: 30
}
},
needle: {
// Needle circle radius as the percentage of the chart area width
radiusPercentage: 2,
// Needle width as the percentage of the chart area width
widthPercentage: 3.2,
// Needle length as the percentage of the interval between inner radius (0%) and outer radius (100%) of the arc
lengthPercentage: 80,
// The color of the needle
color: "rgba(0, 0, 0, 1)"
},
valueLabel: {
formatter: Math.round
},
plugins: {
datalabels: {
display: true,
formatter: function(value, context) {
//return '>'+value;
if (value <= 300) {
return value;
} else {
return '';
}
},
color: function(context) {
//return context.dataset.backgroundColor;
return 'black';
},
//color: 'rgba(255, 255, 255, 1.0)',
/*backgroundColor: "rgba(0, 0, 0, 1.0)",*/
borderWidth: 0,
borderRadius: 5,
font: {
weight: "bold"
}
}
}
}
};
window.onload = function() {
var ctx = document.getElementById("chart").getContext("2d");
window.myGauge = new Chart(ctx, config);
};
canvas {
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!DOCTYPE html>
<html lang="en-US">
<head>
<script src="jQuery/jquery-3.4.1.min.js"></script>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=Edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Gauge Chart with datalabels plugin</title>
<script src="https://unpkg.com/chart.js#2.8.0/dist/Chart.bundle.js"></script>
<script src="https://unpkg.com/chartjs-gauge#0.3.0/dist/chartjs-gauge.js"></script>
<script src="https://unpkg.com/chartjs-plugin-datalabels#0.7.0/dist/chartjs-plugin-datalabels.js"></script>
</head>
<body>
<div id="canvas-holder" style="width:100%">
<canvas id="chart"></canvas>
</div>
</body>
</html>
var data = [150, 200, 250, 300, 400];
colour_array = ["#11d8ee", "#3cc457", "#f12b0e", "#dda522", "#808080"];
let sum = data.reduce(function(a, b) {
return a + b;
}, 0);
var perc = 0;
perc_array = [];
for (i = 0; i < data.length; i++) {
perc = (data[i] / sum * 100).toFixed(2);
perc_array.push(perc);
}
Chart.plugins.register({ //increase distance between legend and chart
id: 'paddingBelowLegends',
beforeInit: function(chart, options) {
chart.legend.afterFit = function() {
this.height = this.height + 50; //custom 50 to value you wish
};
}
});
//when want to disable this plugin in other chart, paddingBelowLegends: false in plugin{}
var config = {
type: "doughnut",
data: {
labels: ['A', 'B', 'C', 'D', 'Others'],
datasets: [{
data: data,
value: data[(colour_array.length - 1)], //300
backgroundColor: colour_array,
borderWidth: 2
}]
},
options: {
responsive: true,
cutoutPercentage: 60,//thickness of chart
title: {
display: true,
text: "Gauge chart with datalabels plugin"
},
layout: {
padding: {
bottom: 30
}
},
valueLabel: {
formatter: Math.round,
display: false // hide the label in center of gauge
},
plugins: {
beforeInit: function(chart, options) {
chart.legend.afterFit = function() {
this.height = this.height + 50;
};
},
outlabels: {
display: true,
//text: '%l %v %p',//(label value percentage)the percentage automatically roundoff
//hide chart text label for last section-https://github.com/Neckster/chartjs-plugin-piechart-outlabels/issues/10#issuecomment-716606369
text: function(label) {
console.log(label);
highest_index = label['labels'].length - 1; //get highest index from the labels array
current_index = label['dataIndex']; //current index
value = label['dataset']['data'][label['dataIndex']]; //value of current index
const v = parseFloat(label['percent']) * 100;
if (current_index != highest_index) //to hide last section text label on chart.
{
//return value + ' , ' + `${v.toFixed(2)}%`;
return value+',\n'+`${v.toFixed(2)}%`;
} else {
return false;
}
},
color: 'white',
stretch: 12, //length of stretching
font: {
resizable: true,
minSize: 10,
maxSize: 14
},
padding: {
/*left:25,
right: 0
top:0,
bottom:0*/
}
},
//inner label:
datalabels: { //label on arc section
display: false,
formatter: function(value, context) {
if (value <= data[(colour_array.length - 2)]) //hide datalabel for last section
{
id = data.indexOf(value);
perc = perc_array[id];
return value + ' , ' + perc + '%';
} else {
return '';
}
},
color: function(context) {
return 'black';
},
borderWidth: 0,
borderRadius: 10,
font: {
weight: "bold",
},
anchor: "end" //'center' (default): element center, 'start': lowest element boundary, 'end': highest element boundary
}
},
legend: { //filter last section from legend chart labels
display: true,
//position: 'right',
labels: {
filter: function(legendItem, data) {
//ori-return legendItem !=1;
return !legendItem.text.includes('Others');
},
boxWidth: 20
}
},
rotation: 1 * Math.PI,
circumference: 1 * Math.PI,
tooltips: {
enabled: true,
mode: 'single',
filter: function(tooltipItem, data) { //disable display tooltip in last section
var label = data.labels[tooltipItem.index];
if (label == "Others") {
return false;
} else {
return true;
}
},
callbacks: { //custom tooltip text to show percentage amount (by default,showing real amount)
label: function(tooltipItem, data) {
var dataset = data.datasets[tooltipItem.datasetIndex];
hovered_index = tooltipItem.index;
data_length = data.datasets[0].data.length;
var total = dataset.data.reduce(function(previousValue, currentValue, currentIndex, array) {
return previousValue + currentValue;
});
var currentValue = dataset.data[tooltipItem.index];
var percentage = (currentValue / total * 100).toFixed(2);
return currentValue + ' , ' + percentage + "%";
}
}
}
}
};
window.onload = function() {
var ctx = document.getElementById("chartJSContainer").getContext("2d");
window.myGauge = new Chart(ctx, config);
};
<html>
<head>
<script src="https://unpkg.com/chart.js#2.8.0/dist/Chart.bundle.js"></script>
<script src="https://unpkg.com/chartjs-gauge#0.3.0/dist/chartjs-gauge.js"></script>
<script src="https://unpkg.com/chartjs-plugin-datalabels#0.7.0/dist/chartjs-plugin-datalabels.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-piechart-outlabels"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
</head>
<body>
<div id="canvas-holder" style="width:50% align:center">
<canvas id="chartJSContainer"></canvas>
</div>
</body>
</html>
Related
I achieved animating a plot using Jukka Kurkela example here.
Now I am having trouble customizing this plot further.
Logic of the custom plot
The plot starts animating with the x-axis labels being 0-20. When the plot reaches 20 then update the x-axis to be 20-40. Increment i or 20 until the x-axis reach its limit.
How to apply the logic above to the Example below?
// Generating data
var data = [];
var prev = 100;
for (var i=0;i<200;i++) {
prev += 5 - Math.random()*10;
data.push({x: i, y: prev});
}
var delayBetweenPoints = 100;
var started = {};
var ctx2 = document.getElementById("chart2").getContext("2d");
var chart2 = new Chart(ctx2, {
type: "line",
data: {
datasets: [
{
backgroundColor: "transparent",
borderColor: "rgb(255, 99, 132)",
borderWidth: 1,
pointRadius: 0,
data: data,
fill: true,
animation: (context) => {
var delay = 0;
var index = context.dataIndex;
if (!started[index]) {
delay = index * delayBetweenPoints;
started[index] = true;
}
var {x,y} = index > 0 ? context.chart.getDatasetMeta(0).data[index-1].getProps(['x','y'],
true) : {x: 0, y: 100};
return {
x: {
easing: "linear",
duration: delayBetweenPoints,
from: x,
delay
},
y: {
easing: "linear",
duration: delayBetweenPoints * 500,
from: y,
delay
},
skip: {
type: 'boolean',
duration: delayBetweenPoints,
from: true,
to: false,
delay: delay
}
};
}
}
]
},
options: {
scales: {
x: {
type: 'linear'
}
}
}
});
<div class="chart">
<canvas id="chart2"></canvas>
</div>
<script src="https://www.chartjs.org/dist/master/Chart.js"></script>
Solved it! Instead of incrementing 20 seconds, it is incrementing every 5 seconds ahead of time. Definitely a better experience for the user.
Got help from Rowf Abd's post.
var myData = [];
var prev = 100;
for (var i=0;i<60;i++) {
prev += 5 - Math.random()*10;
myData.push({x: i, y: prev});
}
var ctx = document.getElementById('myChart').getContext('2d');
var chart = new Chart(ctx, {
type: 'line',
data: {
datasets: [{
data: [myData[0]],
pointRadius: 0,
fill: false,
borderColor: "black",
lineTension: 0
}]
},
options: {
legend: {
onClick: (e) => e.stopPropagation()
},
title:{
fontColor: 'Black'
},
layout: {
padding: {
right: 10
}
},
scales: {
xAxes: [{
type: 'linear',
ticks: {
}
}],
yAxes: [{
scaleLabel: {
// fontFamily: 'Lato',
fontSize: 19,
fontColor: "Black"
}
}]
}
}
});
var next = function() {
var data = chart.data.datasets[0].data;
var count = data.length;
var xabsmin = 20;
var xabsmax = 60;
var incVar = 5;
data[count] = data[count - 1];
chart.update({duration: 0});
data[count] = myData[count];
chart.update();
if (count < myData.length - 1) {
setTimeout(next, 500);
}
if (data[count].x < xabsmin) {
chart.config.options.scales.xAxes[0].ticks.min = xabsmin - xabsmin;
chart.config.options.scales.xAxes[0].ticks.max = xabsmin;
chart.update();
}
if(data[count].x >= xabsmin && data[count].x < (xabsmax)){
var currentT = parseFloat(data[count].x);
var modDiv = (currentT % incVar);
var tempXMax = (currentT) + (incVar - modDiv);
chart.config.options.scales.xAxes[0].ticks.max = tempXMax;
chart.config.options.scales.xAxes[0].ticks.min = tempXMax - xabsmin;
chart.update();
}
}
setTimeout(next, 500);
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.3/Chart.min.js"></script>
<canvas id="myChart"></canvas>
Based on the code of this Highchart example, I would like to display some text in the center of the donut circle, when a certain tile is clicked. Is it now possible, to make the displayed text scrollable when it doesn't fit nicely into the circle's inner area?
What I have so far
$(function () {
var colors = ['#8d62a0', '#ceb3d8', '#d5dddd'];
var chart = new Highcharts.Chart({
chart: {
renderTo: 'vacation-time-chart',
type: 'pie',
height: 300,
width: 300,
borderRadius: 0
},
credits: {
enabled: false
},
title: false,
tooltip: {
formatter: function() {
return '<b>'+this.y+'</b>';
}
},
plotOptions: {
pie: {
borderWidth: 6,
startAngle: 90,
innerSize: '75%',
size: '100%',
shadow: true,
// {
// color: '#000000',
// offsetX: 0,
// offsetY: 2,
// opacity: 0.7,
// width: 3
// },
dataLabels: false,
stickyTracking: false,
states: {
hover: {
enabled: false
}
},
point: {
events: {
click: function(){
this.series.chart.innerText.attr({text: this.txt});
}
}
}
}
},
series: [{
data: [
{y:40, color: colors[0], txt: 'yoyo'},
{y:10, color: colors[1], txt: 'dada'},
{y:60, color: colors[2], txt: 'this is a longer text that I would like to be scrollable. this is a longer text that I would like to be scrollable. this is a longer text that I would like to be scrollable. this is a longer text that I would like to be scrollable. this is a longer text that I would like to be scrollable.this is a longer text that I would like to be scrollable. this is a longer text that I would like to be scrollable.'}
]
// data: [
// ['Firefox', 44.2],
// ['IE7', 26.6],
// ['IE6', 20],
// ['Chrome', 3.1],
// ['Other', 5.4]
// ]
}]
},
function(chart) { // on complete
var xpos = '50%';
var ypos = '53%';
var circleradius = 102;
var boundingBox;
var series = chart.series[0];
var zones;
// Render the text
chart.innerText = chart.renderer.label('Articles mentioning XY', 135, 125).add();
boundingBox = chart.innerText.getBBox();
chart.innerText.css({
display:"inline-block",
position:"absolute",
top:"1px",
width: "150px",
height:"30px",
color: '#4572A7',
fontSize: '12px',
overflow: 'auto',
textAlign: 'block'
}).attr({
// why doesn't zIndex get the text in front of the chart?
x: series.center[0] - boundingBox.width / 2 + chart.plotLeft / 2,
y: series.center[1] + boundingBox.height / 2 + chart.plotTop,
zIndex: 999
}).add();
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>test</title>
<script src="http://code.highcharts.com/highcharts.js"></script>
</head>
<body>
<div id="vacation-time-chart" style="min-width: 300px; height: 300px; margin: 0 auto"></div>
<script src="testfile.js"></script>
</body>
</html>
Could anyone please help me with this? Adding overflow: auto (or scroll) to the innterText.css properties doesn't seem to be the solution here.
You can do this,
function defineInnerData(name, y, obj) { // on complete
var chart=$("#container").highcharts();
$( "#pieChartInfoText" ).remove();
var textX = chart.plotLeft + (chart.plotWidth * 0.5);
var textY = chart.plotTop + (chart.plotHeight * 0.5);
var span = '<span id="pieChartInfoText" style="position:absolute; text-align:center;left: 235px;top:210px;width: 130px;">';
span += '<span style="font-size: 15px">'+ y +'</span><br>';
span += '<span style="font-size: 12px">'+ name +'</span>';
span += '</span>';
$("#addText").append(span);
span = $('#pieChartInfoText');
span.css('left', textX + (span.width() * -0.5));
span.css('top', textY + (span.height() * -0.5));
}
defineInnerData("", "Tap the slices of this chart to see more");
And call it inside,
series: {
cursor: 'pointer',
point: {
events: {
mouseOver: function() {
console.log(this)
defineInnerData(this.name, this.y, this);
}
}
},
DEMO
With the Highcharts value-in-legend plugin http://www.highcharts.com/plugin-registry/single/10/Value-In-Legend, I have been able to kind of implement a sort of multiple series total, but I do not understand how to get a total for a clicked y-axis point.
For example when I click, one day I will get the 3 separate series numbers, but I would like to get a total somehow as well, but I only know the y points on load and the visible y-points on redraw. I think the difficulty is getting the total of the 3 series points versus getting the individual point's value.
$(function() {
// Start the standard Highcharts setup
var seriesOptions = [],
yAxisOptions = [],
seriesCounter = 0,
names = ['MSFT', 'AAPL', 'GOOG'],
colors = Highcharts.getOptions().colors;
$.each(names, function(i, name) {
$.getJSON('http://www.highcharts.com/samples/data/jsonp.php?filename=' + name.toLowerCase() + '-c.json&callback=?', function(data) {
seriesOptions[i] = {
name: name,
data: data
};
// As we're loading the data asynchronously, we don't know what order it will arrive. So
// we keep a counter and create the chart when all the data is loaded.
seriesCounter++;
if(seriesCounter == names.length) {
createChart();
}
});
});
// create the chart when all data is loaded
function createChart() {
$('#container').highcharts('StockChart', {
chart: {
events: {
load: function(event) {
console.log('load');
var total = 0;
for(var i = 0, len = this.series[0].yData.length; i < len; i++) {
total += this.series[0].yData[i];
}
totalText_posts = this.renderer.text('Total: ' + total, this.plotLeft, this.plotTop - 35).attr({
zIndex: 5
}).add()
},
redraw: function(chart) {
console.log('redraw');
console.log(totalText_posts);
var total = 0;
for(var i = 0, len = this.series[0].yData.length; i < len; i++) {
if(this.series[0].points[i] && this.series[0].points[i].visible) total += this.series[0].yData[i];
}
totalText_posts.element.innerHTML = 'Total: ' + total;
}
}
},
rangeSelector: {
selected: 4
},
yAxis: {
labels: {
formatter: function() {
return(this.value > 0 ? '+' : '') + this.value + '%';
}
},
plotLines: [{
value: 0,
width: 2,
color: 'silver'
}]
},
legend: {
enabled: true,
floating: true,
align: 'left',
verticalAlign: 'top',
y: 35,
labelFormat: '<span style="color:{color}">{name}</span>: <b>{point.y:.2f} USD</b> ({point.change:.2f}%)<br/>',
borderWidth: 0
},
plotOptions: {
series: {
compare: 'percent',
cursor: 'pointer',
point: {
events: {
click: function () {
alert('Category: ' + this.category + ', value: ' + this.y);
}
}
}
}
},
series: seriesOptions
});
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://code.highcharts.com/stock/highstock.src.js"></script>
<script src="http://code.highcharts.com/stock/modules/exporting.js"></script>
<script src="https://rawgithub.com/highslide-software/value-in-legend/master/value-in-legend.js"></script>
<div id="container" style="height: 400px; min-width: 500px"></div>
I was able to find out a way to put the total result as a title in a multi series by reading the source code for the Highcharts value-in-legend plugin https://rawgithub.com/highslide-software/value-in-legend/master/value-in-legend.js.
$(function () {
var seriesOptions_likes = [],
seriesCounter_likes = 0,
names_likes = ['MSFT', 'AAPL', 'GOOG'],
totalText_likes = 0;
/**
* Create the chart when all data is loaded
* #returns {undefined}
*/
function createLikesChart() {
Highcharts.stockChart('container_likes', {
chart: {
},
rangeSelector: {
selected: 4
},
title: {
text: 'Total Results: '
},
yAxis: {
labels: {
formatter: function () {
return (this.value > 0 ? ' + ' : '') + this.value + '%';
}
},
plotLines: [{
value: 0,
width: 2,
color: 'silver'
}]
},
plotOptions: {
series: {
compare: 'percent',
showInNavigator: true
}
},
tooltip: {
pointFormat: '<span style="color:{series.color}">{series.name}</span>: <b>{point.y}</b> ({point.change}%)<br/>',
valueDecimals: 2,
split: true
},
series: seriesOptions_likes,
legend: {
enabled: true,
floating: true,
align: 'left',
verticalAlign: 'top',
y: 65,
borderWidth: 0
},
});
}
$.each(names_likes, function (i, name) {
$.getJSON('https://www.highcharts.com/samples/data/jsonp.php?filename=' + name.toLowerCase() + '-c.json&callback=?', function (data) {
seriesOptions_likes[i] = {
name: name,
data: data
};
// As we're loading the data asynchronously, we don't know what order it will arrive. So
// we keep a counter and create the chart when all the data is loaded.
seriesCounter_likes += 1;
if (seriesCounter_likes === names_likes.length) {
createLikesChart();
}
});
});
});
(function (H) {
H.Series.prototype.point = {}; // The active point
H.Chart.prototype.callbacks.push(function (chart) {
$(chart.container).bind('mousemove', function () {
var legendOptions = chart.legend.options,
hoverPoints = chart.hoverPoints,
total = 0;
if (!hoverPoints && chart.hoverPoint) {
hoverPoints = [chart.hoverPoint];
}
if (hoverPoints) {
var total = 0,
ctr = 0;
H.each(hoverPoints, function (point) {
point.series.point = point;
total += point.y;
});
H.each(chart.legend.allItems, function (item) {
item.legendItem.attr({
text: legendOptions.labelFormat ?
H.format(legendOptions.labelFormat, item) :
legendOptions.labelFormatter.call(item)
});
});
chart.legend.render();
chart.title.update({ text: 'Total Results: ' + total.toFixed(2) });
}
});
});
// Hide the tooltip but allow the crosshair
H.Tooltip.prototype.defaultFormatter = function () { return false; };
}(Highcharts));
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://code.highcharts.com/stock/highstock.js"></script>
<script src="https://code.highcharts.com/stock/modules/exporting.js"></script>
<div id="container_likes" style="height: 400px; min-width: 600px"></div>
I am using Flotcharts to create a stacked bar chart to show breakdown of values. I have this working so that once I hover over the stack it will show a tool tip with the value for that stack in it (you can see this in the second column).
What I need is at the top of all the stacks that it shows a label of the total value.
Something like High Charts Stacked Column.
You can see my code below. I loop through the data (using Smarty) and set it there.
// set the data
var data = [
{
label: 'Tenant',
data: [
{foreach $metrics.rent_applied_by_month as $rent_applied}
[{$rent_applied#index}, {$rent_applied.tenant_value|number_format:2:'.':''}],
{/foreach}
],
color: '#008000'
},
{
label: 'Benefit',
data: [
{foreach $metrics.rent_applied_by_month as $rent_applied}
[{$rent_applied#index}, {$rent_applied.benefit_value|number_format:2:'.':''}],
{/foreach}
],
color: '#0000ff'
}
];
// set the xasis labels
var ticks = [
{foreach $metrics.rent_applied_by_month as $rent_applied}
[{$rent_applied#index}, '{$rent_applied.period}'],
{/foreach}
];
// chart options
var options = {
series: {
stack: 0,
bars: {
show: true,
align: "center",
barWidth: 0.6,
fill: .75,
}
},
xaxis: {
ticks: ticks,
tickLength: 1
},
grid: {
hoverable: true,
clickable: true,
borderWidth: {
top: 0,
right: 0,
bottom: 1,
left: 1
},
borderColor: {
top: "#e5e5e5",
right: "#e5e5e5",
bottom: "#a5b2c0",
left: "#a5b2c0"
}
},
legend: {
show: true,
noColumns: 2,
position: "nw",
margin: [10, 0],
labelBoxBorderColor: null
}
};
$.plot("#rent_applied", data, options);
You'll need to loop through each of the bars in each stack to get the total value of all bars in each stack. With that total value in hand, you can pass it into flot's plot.pointOffset() method to get the position of the top of the stacked bars.
The code below has a sample method to get all of the values of a stack of bars, then uses the plot.pointOffset() to append a div showing the value on top of the bar.
$(function() {
var data = [{
data: [ [0, 21.51], [1, 32.50], [2, 47.14], [3, 10] ],
stack: 0,
label: 'Bottom'
}, {
data: [ [0, 37.77], [1, 24.65], [2, 7.67], [4, 15]],
stack: 0,
label: 'Top'
}];
var options = {
series: {
bars: {
show: true,
barWidth: .5,
align: "center"
},
points: { show: false }
}
};
var plot = $.plot($('#graph'), data, options);
displayBarValues();
// display values on top of bars
function displayBarValues() {
var plotData = plot.getData();
var xValueToStackValueMapping = [];
// loop through each data series
for (var i = 0; i < plotData.length; i++) {
var series = plotData[i];
// loop through each data point in the series
for (var j = 0; j < series.data.length; j++) {
var value = series.data[j];
// if the x axis value is not in the mapping, add it.
if (!xValueExistsInMapping(xValueToStackValueMapping, value[0])) {
xValueToStackValueMapping.push([value[0], 0]);
}
// add the value of the bar to the x value mapping
addValueToMapping(xValueToStackValueMapping, value[0], value[1]);
}
}
// loop through each of our stacked values and place them on the bar chart
$.each(xValueToStackValueMapping, function(i, value) {
// find the offset of the top left of the bar
var leftoffset = plot.pointOffset({ x: value[0] - .5, y: value[1] });
// find the offset of the top right of the bar (our bar width is .5)
var rightoffset = plot.pointOffset({ x: value[0] + .5, y: value[1] });
$('<div class="data-point-value">' + value[1] + '</div>').css({
left: leftoffset.left,
top: leftoffset.top - 14,
width: rightoffset.left - leftoffset.left,
textAlign: 'center'
}).appendTo(plot.getPlaceholder());
});
}
function xValueExistsInMapping(mapping, value) {
for (var i = 0; i < mapping.length; i++) {
if (mapping[i][0] !== undefined && mapping[i][0] === value) {
return true;
}
}
return false;
}
function addValueToMapping(mapping, xValue, yValue) {
for (var i = 0; i < mapping.length; i++) {
if (mapping[i][0] === xValue) {
mapping[i][1] = mapping[i][1] + yValue;
}
}
}
});
#graph {
margin: 0 auto;
text-align: center;
width: 600px;
height: 400px;
}
.data-point-value {
position: absolute;
white-space: nowrap;
font-size: 11px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/flot/0.8.3/jquery.flot.js"></script>
<script src="https://rawgit.com/flot/flot/master/jquery.flot.stack.js"></script>
<div id="graph"></div>
I need to input the value of the first percentage into the chart, like this image
In this case, put the value of pedro(33%) within the chart.
I am beginner with chartJS and do not know it completely. Is it possible to do that?
var randomScalingFactor = function() {
return Math.round(Math.random() * 100);
};
var config = {
type: 'doughnut',
data: {
datasets: [{
data: [
33,
67,
],
backgroundColor: [
"#F7464A",
"#46BFBD",
],
label: 'Expenditures'
}],
labels: [
"Pedro: 33 ",
"Henrique: 67 ",
]
},
options: {
responsive: true,
legend: {
position: 'bottom',
},
title: {
display: true,
text: 'Pedro Henrique Kuzminskas Miyazaki de Souza'
},
animation: {
animateScale: true,
animateRotate: true
},
tooltips: {
callbacks: {
label: function(tooltipItem, data) {
var dataset = data.datasets[tooltipItem.datasetIndex];
var total = dataset.data.reduce(function(previousValue, currentValue, currentIndex, array) {
return previousValue + currentValue;
});
var currentValue = dataset.data[tooltipItem.index];
var precentage = Math.floor(((currentValue / total) * 100) + 0.5);
return precentage + "%";
}
}
}
}
};
var ctx = document.getElementById("myChart").getContext("2d");
window.myDoughnut = new Chart(ctx, config); {
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.3.0/Chart.min.js"></script>
<canvas id="myChart" width="400" height="200"></canvas>
This is not part of the default behavior. You will need to modify the chart.js script.
How to add text inside the doughnut chart using Chart.js?