How to set max and min value for Y axis

Question

I am using line chart from http://www.chartjs.org/

As you can see max value (1

Answer 1

window.onload = function(){
var ctx = document.getElementById("canvas").getContext("2d");
window.myLine = new Chart(ctx ,{
          type: 'line',
          data: yourData,
          options: {
            scales: {
                yAxes: [{
                    ticks: {
                        beginAtZero:true,
                        min: 0,
                        max: 500    
                    }
                  }]
               }
            }
});

I configure with 'options' in v2.

You should read documentation: http://www.chartjs.org/docs/#scales-linear-scale

Answer 2

I wrote a js to display values from 0 to 100 in y-axis with a gap of 20.

This is my script.js

//x-axis
var vehicles = ["Trucks", "Cars", "Bikes", "Jeeps"];

//The percentage of vehicles of each type
var percentage = [41, 76, 29, 50];

var ctx = document.getElementById("barChart");
var lineChart = new Chart(ctx, {
  type: 'bar',
  data: {
    labels: vehicles,
    datasets: [{
      data: percentage,
      label: "Percentage of vehicles",
      backgroundColor: "#3e95cd",
      fill: false
    }]
  },
  options: {
    scales: {
      yAxes: [{
        ticks: {
          beginAtZero: true,
          min: 0,
          max: 100,
          stepSize: 20,
        }
      }]
    }
  }
});

This is the graph displayed on the web.

Answer 3

You have to overrride the scale, try this: (applies to ChartJS v1.x)

window.onload = function(){
    var ctx = document.getElementById("canvas").getContext("2d");
    window.myLine = new Chart(ctx).Line(lineChartData, {
        scaleOverride : true,
        scaleSteps : 10,
        scaleStepWidth : 50,
        scaleStartValue : 0 
    });
}

Answer 4

ChartJS v2.4.0

As shown in the examples at https://github.com/jtblin/angular-chart.js on the 7th of febuary 2017 (since this seems to be subject to frequent change):

var options = {
    yAxes: [{
        ticks: {
            min: 0,
            max: 100,
            stepSize: 20
        }
    }]
}

This will result in 5 y-axis values as such:

100
80
60
40
20
0

Answer 5

For chart.js V2 (beta), use:

var options = {
    scales: {
        yAxes: [{
            display: true,
            ticks: {
                suggestedMin: 0,    // minimum will be 0, unless there is a lower value.
                // OR //
                beginAtZero: true   // minimum value will be 0.
            }
        }]
    }
};

See chart.js documentation on linear axes configuration for more details.