问题
I created a simple line chart using chart.js with 3 Y axes: https://codepen.io/anon/pen/dZVgKw
As you can see, the last one is going from 10 to 20 without any number between. How can I set step size here?
This is how I add an axe:
{
id: 'C',
type: 'linear',
position: 'left',
ticks: {
max: 10,
min: 20,
},
}
Thanks.
回答1:
How can I set step size here?
Straight from the samples (Linear Scale, step size):
By setting a stepSize value.
scales: {
xAxes: [{
display: true,
scaleLabel: {
display: true,
labelString: 'Month'
}
}],
yAxes: [{
display: true,
scaleLabel: {
display: true,
labelString: 'Value'
},
ticks: {
min: 0,
max: 100,
// forces step size to be 5 units
stepSize: 5 // <----- This prop sets the stepSize
}
}]
}
Here's a live example:
var ctx = document.getElementById('chartJSContainer').getContext('2d')
new Chart(ctx, {
type: 'line',
data: {
labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
datasets: [
{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
borderWidth: 1
},
{
label: '# of Points',
data: [7, 11, 5, 8, 3, 7],
borderWidth: 1
}
]
},
options: {
scales: {
yAxes: [{
ticks: {
reverse: false,
stepSize: 3
},
}]
}
}
})<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.3.0/Chart.js"></script>
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
</body>来源：https://stackoverflow.com/questions/47334236/how-to-set-axes-step-size-in-chart-js-2