How to use plotly.js drawing library-JS Tutorial-php.cn

How to use plotly.js drawing library

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Release： 2018-03-17 14:36:01

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This time I will show you how to use the plotly.js drawing library, what are the precautions when using the plotly.js drawing library, the following is a practical case, let's take a look.

This article introduces the introductory tutorial of plotly.js drawing library and shares it with everyone. The details are as follows:

Plotly

##Origin

In the past two days, I want to display mathematical function images on the front end. I guess there should be a mature js library.

So, I simply tried it.

Finally decided to use plotly.js. Others such as function-plot also look good. I will take a look at it when I have time.

Plotly

plotly.js is the open source

JavaScript graphing library that powers Plotly.

Plotly can be called One of the best drawing libraries ever created.

Simple case

Code

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>plot 绘制图像</title>
</head>
<body>
<p id="tester" style="width:600px;height:250px;"></p>
</body>
<script src="https://cdn.plot.ly/plotly-1.2.0.min.js"></script>
<!-- test -->
<script>
  TESTER = document.getElementById('tester');
  Plotly.plot(TESTER, [{
    x: [1, 2, 3, 4, 5],
    y: [1, 2, 4, 8, 16]
  }], {
    margin: {t: 0}
  });
</script>
</html>

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Effect

Dot diagram

Drawing mathematical images

The principles of mathematical image drawing. For example, y = 2*x+1 is actually an image formed by connecting a series of (x,y) points.

Code

<p id="math-function" style="width:600px;height:250px;"></p>
<script src="https://cdn.plot.ly/plotly-1.2.0.min.js"></script>
<script>
  TESTER = document.getElementById('math-function');
  var x = [], y = [];
  for(var i = -10; i < 10; i += 1) {
    x.push(i);
    y.push(2*i+1);
  }
  Plotly.plot(TESTER, [{
    x: x,
    y: y
  }], {
    margin: {t: 0}
  });
</script>

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Effect

## I believe you have mastered the method after reading the case in this article, and there will be more exciting things Please pay attention to other related articles on php Chinese website!