I'm trying to build a chart of the top 10 activities that take the most time to perform and I'm basing myself on the duration of each one.
I created an example in Google Spreadsheet to exemplify what i need.
I couldn't create a graph with 'hour' data, so I converted it to seconds. But I would like to display the hours on the X axis as in the image.
Here's my code:
enter link description here
<canvas id="myChart" height="200"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.min.js"></script>
<script>
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'horizontalBar',
data: {
labels: ["Work", "Study", "Gym"],
datasets: [{
label: '# activities',
data: [30000, 9000, 5400],
time: ['08:20', '02:30', '01:30:00'],
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)'
],
borderColor: [
'rgba(255,99,132,1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)'
],
borderWidth: 1
}]
},
options: {
tooltips: {
callbacks: {
label: function(tooltipItem, data) {
return 'Duration ' + data['datasets'][0]['time'][tooltipItem['index']];
}
}
},
scales: {
xAxes: [{
ticks: {
min: 0,
max: 45000,
stepSize: 5000
}
}]
}
}
});
</script>
Any tips?
You can define a ticks.callback function on your x-axis as follows:
xAxes: [{
ticks: {
min: 0,
max: 45000,
stepSize: 7200,
callback: v => Number.isInteger(v / 3600) ? (v / 3600) + ':00:00' : ''
}
}]
Please take a look at your amended and runnable code below and see how it works.
var myChart = new Chart('myChart', {
type: 'horizontalBar',
data: {
labels: ["Work", "Study", "Gym"],
datasets: [{
label: '# activities',
data: [30000, 9000, 5400],
time: ['08:20', '02:30', '01:30:00'],
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)'
],
borderColor: [
'rgba(255,99,132,1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)'
],
borderWidth: 1
}]
},
options: {
tooltips: {
callbacks: {
label: function(tooltipItem, data) {
return 'Duration ' + data['datasets'][0]['time'][tooltipItem['index']];
}
}
},
scales: {
xAxes: [{
ticks: {
min: 0,
max: 45000,
stepSize: 7200,
callback: v => Number.isInteger(v / 3600) ? (v / 3600) + ':00:00' : ''
}
}]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.js"></script>
<canvas id="myChart" height="90"></canvas>
Related
var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
type: 'line',
data: {
labels: {{ labels}},//labels are the time values
datasets: [{
label: '# temperature',
data: {{ datas}},
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)',
'rgba(75, 192, 192, 0.2)',
'rgba(153, 102, 255, 0.2)',
'rgba(255, 159, 64, 0.2)'
],
borderColor: [
'rgba(255, 99, 132, 1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)',
'rgba(75, 192, 192, 1)',
'rgba(153, 102, 255, 1)',
'rgba(255, 159, 64, 1)'
],
borderWidth: 1
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}]
}
}
});
You need to define your xAxis as a time cartesian axis with a unit that matches your data. The default display format of 'hour' is 'hA' (for instance '2PM'). You should probably also use the same format for displaying tooltips.
xAxes: [{
type: 'time',
time: {
unit: 'hour',
tooltipFormat: 'hA'
}
}],
Please note that Chart.js uses Moment.js for the functionality of the time axis. Therefore you should use the bundled version of Chart.js that includes Moment.js in a single file.
Please have a look at belo runnable code snippet.
const labels = [1585725538000, 1585729616000, 1585742414000, 1585812498000, 1585842536000, 1585918521000, 1585938665000, 1585948685000];
const datas = [15, 16, 15, 17, 12, 13, 11, 12];
var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
type: 'line',
data: {
labels: labels,
datasets: [{
label: '# temperature',
data: datas,
backgroundColor: 'rgba(255, 99, 132, 0.2)',
borderColor: 'rgba(255, 99, 132, 1)',
borderWidth: 1
}]
},
options: {
scales: {
xAxes: [{
type: 'time',
time: {
unit: 'hour',
tooltipFormat: 'hA'
}
}],
yAxes: [{
ticks: {
beginAtZero: true
}
}]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.bundle.js"></script>
<canvas id="myChart" height="90"></canvas>
I was able to create this doughnut chart that displays data. However, now that I look at it, I would like add the number value of the foods (100,200,300) below, on a second line, instead of having next to the food item itself. Is there a way to do this? I was thinking that since this is a nested array, looping through it may work? Any thoughts?
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'doughnut',
data: {
label1: [["Pizza: 100"], ["Hot Dogs: 200"], ["Burgers:300"]],
datasets: [{
label: '# of Votes',
data: [12, 19, 3],
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)'
],
borderColor: [
'rgba(255,99,132,1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)'
],
borderWidth: 1
}]
},
options: {
tooltips: {
callbacks: {
title: function(tooltipItem, data, label1, label2) {
return data ['label1'][tooltipItem[0]['index']];
},
label: function(tooltipItem, data) {
return data['datasets'][0]['data'][tooltipItem['index']];
},
afterLabel: function(tooltipItem, data) {
var dataset = data['datasets'][0];
var percent = Math.round((dataset['data'][tooltipItem['index']] / dataset["_meta"][0]['total']) * 100)
return '(' + percent + '%)';
}
},
backgroundColor: '#FFF',
titleFontSize: 16,
titleFontColor: '#0066ff',
bodyFontColor: '#000',
bodyFontSize: 14,
displayColors: false
}
}
});
<div>
<canvas id="myChart" height="100"></canvas>
<div id="chartjs-tooltip">
<table></table>
</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.min.js">
</script>
I have a chart.js chart in my app. This is how it looks without negative values:
With negative values:
As you can see I have dual axisY. They work as needed if there are no negative values. But if there are some, right AxisY starts in the incorrect position.
How to make it starts in the same place as left AxisY?
Here is my code:
private buildOptions(): any {
return {
responsive: true,
title: {
display: false,
text: ''
},
tooltips: {
mode: 'index',
intersect: true
},
scales: {
yAxes: [{
position: "left",
id: "y-axis-0",
fontColor: '#fff'
}, {
position: "right",
id: "y-axis-1",
fontColor: '#fff'
}]
},
legend: {
display: true,
labels: {
fontColor: '#fff'
}
}
};
}
Thank you.
Have you tried setting the same min value for both axes?
You can use ticks for specifying it:
ticks: {
min: -5
}
Here's an example snippet I made for you:
var ctx = document.getElementById("myChart").getContext('2d');
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, -5, 3, 5, 2, -3],
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)',
'rgba(75, 192, 192, 0.2)',
'rgba(153, 102, 255, 0.2)',
'rgba(255, 159, 64, 0.2)'
],
borderColor: [
'rgba(255,99,132,1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)',
'rgba(75, 192, 192, 1)',
'rgba(153, 102, 255, 1)',
'rgba(255, 159, 64, 1)'
],
borderWidth: 1
}]
},
options: {
scales: {
yAxes: [{
position: "left",
id: "y-axis-0",
fontColor: '#fff',
ticks: {
min: -5
}
}, {
position: "right",
id: "y-axis-1",
fontColor: '#fff',
ticks: {
min: -5
}
}]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.4.0/Chart.bundle.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div style="width:50%;">
<canvas id="myChart" width="400" height="400"></canvas>
</div>
I tried every possible way, every form-answer but anything works inmy code. I want yAxes begin at zero and max value is 100 but all my chart begin with other values (see pic). What can I do?
var options = {
responsive: true,
scales: {
yAxes: [{
display: true,
ticks: {
beginAtZero: true,
max: 100,
min: 0
}
}]
},
title: {
display: true,
text: name
},
tooltips: {
mode: 'index',
intersect: false,
},
hover: {
mode: 'nearest',
intersect: true
},
};
key is to pass options in the Chart constructor instead of part of data
new Chart(ctx, {
type: 'bar',
data: {{ chart_data|safe }},
options: {
scales: {
yAxes: [{
display: true,
ticks: {
beginAtZero: true
}
}]
}
}
});
above works for me!
#Nikolas,
Here is the fiddle where the parameters you set works well.
https://jsfiddle.net/shemdani/zkb215up/2/
var options = {
responsive: true,
scales: {
yAxes: [{
display: true,
ticks: {
beginAtZero: true,
max: 100,
min: 0
}
}]
},
title: {
display: true,
text: name
},
tooltips: {
mode: 'index',
intersect: false,
},
hover: {
mode: 'nearest',
intersect: true
},
};
var data = {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [32, 59, 36, 25, 68, 71],
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)',
'rgba(75, 192, 192, 0.2)',
'rgba(153, 102, 255, 0.2)',
'rgba(255, 159, 64, 0.2)'
],
borderColor: [
'rgba(255,99,132,1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)',
'rgba(75, 192, 192, 1)',
'rgba(153, 102, 255, 1)',
'rgba(255, 159, 64, 1)'
],
borderWidth: 1
}]
}
var ctx = document.getElementById("myChart");
var chartInstance = new Chart(ctx, {
type: 'line',
data: data,
options:options
});
Please check and see what you are doing wrong. I used the basic data from charjs documentation.
Working for version 3.2.0:
var options = {
// plugins, responsive etc...
scales: {
y: {
min: 0
}
},
//tooltips specifications...
}
The y-axis will start at 0:
I tried different solutions and adding barThickness: 25 in options worked for me.
I am using charts.js to display data. i have it set up and it is working.
However, I have read through all the documentation and cannot figure out how to solve what I want to achieve.
Currently, the data contains three numbers [12, 19, 3]. this is the number of actual goals scored. However, there is also a prediction as to the number of goals scored. This value is always going to be less based on the data I have. so the expected goals scored are [8, 11, 1]. these correspond with the first set.
Is there anyway to combine the two values in the same bar. So in the first bar, it would go to 8, as the expected number of goals, and then the top part of the bar would show the actual number of goals.
Here is my code below.
Hopefully my question makes sense
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Red", "Blue", "Yellow"],
datasets: [{
label: '# of Goals',
data: [12, 19, 3],
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)'
],
borderColor: [
'rgba(255,99,132,1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)'
],
borderWidth: 1
}]
},
options: {
responsive: false,
scales: {
yAxes: [{
ticks: {
beginAtZero:true
}
}]
}
}
});
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ["Red", "Blue", "Yellow"],
datasets: [{
label: '# of Likes',
data: [12, 19, 3],
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)'
],
borderColor: [
'rgba(255,99,132,1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)'
],
borderWidth: 1
}]
},
options: {
responsive: false,
scales: {
yAxes: [{
ticks: {
beginAtZero:true
}
}]
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.4/Chart.bundle.min.js"></script>
<canvas id="myChart" width="400" height="400"></canvas>
Version 2 does support stacked bar charts.
https://jsfiddle.net/r71no58a/10/
scales: {
xAxes: [{
stacked: true,
}],
yAxes: [{
stacked: true,
ticks: {
beginAtZero: true
}
}]
}