Setting Graph Size in JavaScript

How to change the size of D3.js-based graphs in javascript.

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Plotly is a free and open-source graphing library for JavaScript. We recommend you read our Getting Started guide for the latest installation or upgrade instructions, then move on to our Plotly Fundamentals tutorials or dive straight in to some Basic Charts tutorials.

Adjusting Height, Width, and Margins

var data = [
  {
    x: [0, 1, 2, 3, 4, 5, 6, 7, 8],
    y: [0, 1, 2, 3, 4, 5, 6, 7, 8],
    type: 'scatter'
  }
];
var layout = {
  autosize: false,
  width: 500,
  height: 500,
  margin: {
    l: 50,
    r: 50,
    b: 100,
    t: 100,
    pad: 4
  },
  paper_bgcolor: '#7f7f7f',
  plot_bgcolor: '#c7c7c7'
};
Plotly.newPlot('myDiv', data, layout);

Automatically Adjust Margins

Set automargin=true (reference) and Plotly will automatically increase the margin size to prevent ticklabels from being cut off or overlapping with axis titles.

var data = [
  {
    x: ['Apples', 'Oranges', 'Watermelon', 'Pears'],
    y: [3, 2, 1, 4],
    type: 'bar'
  }
];
var layout = {
  autosize: false,
  width: 500,
  height: 500,
  yaxis: {
    title: {
      text: 'Y-axis Title',
      font: { size: 30 }
    },
    ticktext: ['long label','Very long label','3','label'],
    tickvals: [1, 2, 3, 4],
    tickmode: 'array',
    automargin: true,
  },
  paper_bgcolor: '#7f7f7f',
  plot_bgcolor: '#c7c7c7'
};
Plotly.newPlot('myDiv', data, layout);