# Plotly.js

Plotly.js is a charting library that comes with over 40 chart types, 3D charts, statistical graphs, and SVG maps.

## Scatter Plots

### Source Code

const xArray = [50,60,70,80,90,100,110,120,130,140,150];
const yArray = [7,8,8,9,9,9,10,11,14,14,15];

// Define Data
const data = [{
x: xArray,
y: yArray,
mode:"markers",
type:"scatter"
}];

// Define Layout
const layout = {
xaxis: {range: [40, 160], title: "Square Meters"},
yaxis: {range: [5, 16], title: "Price in Millions"},
title: "House Prices vs. Size"
};

Plotly.newPlot("myPlot", data, layout);

Try it Yourself »

## Line Graphs

### Source Code

const xArray = [50,60,70,80,90,100,110,120,130,140,150];
const yArray = [7,8,8,9,9,9,10,11,14,14,15];

// Define Data
const data = [{
x: xArray,
y: yArray,
mode: "lines",
type: "scatter"
}];

// Define Layout
const layout = {
xaxis: {range: [40, 160], title: "Square Meters"},
yaxis: {range: [5, 16], title: "Price in Millions"},
title: "House Prices vs Size"
};

// Display using Plotly
Plotly.newPlot("myPlot", data, layout);

Try it Yourself »

## Linear Graphs

### Source Code

let exp = "x + 17";

// Generate values
const xValues = [];
const yValues = [];
for (let x = 0; x <= 10; x += 1) {
yValues.push(eval(exp));
xValues.push(x);
}

// Define Data
const data = [{
x: xValues,
y: yValues,
mode: "lines"
}];

// Define Layout
const layout = {title: "y = " + exp};

// Display using Plotly
Plotly.newPlot("myPlot", data, layout);

Try it Yourself »

## Multiple Lines

### Source Code

let exp1 = "x";
let exp2 = "1.5*x";
let exp3 = "1.5*x + 7";

// Generate values

const x1Values = [];
const x2Values = [];
const x3Values = [];
const y1Values = [];
const y2Values = [];
const y3Values = [];

for (let x = 0; x <= 10; x += 1) {
x1Values.push(x);
x2Values.push(x);
x3Values.push(x);
y1Values.push(eval(exp1));
y2Values.push(eval(exp2));
y3Values.push(eval(exp3));
}

// Define Data
const data = [
{x: x1Values, y: y1Values, mode:"lines"},
{x: x2Values, y: y2Values, mode:"lines"},
{x: x3Values, y: y3Values, mode:"lines"}
];

// Define Layout
const layout = {title: "[y=" + exp1 + "] [y=" + exp2 + "] [y=" + exp3 + "]"};

// Display using Plotly
Plotly.newPlot("myPlot", data, layout);

Try it Yourself »

## Bar Charts

### Source Code

const xArray = ["Italy","France","Spain","USA","Argentina"];
const yArray = [55, 49, 44, 24, 15];

const data = [{
x: xArray,
y: yArray,
type: "bar"  }];
const layout = {title:"World Wide Wine Production"};

Plotly.newPlot("myPlot", data, layout);

Try it Yourself »

## Horizontal Bar Charts

### Source Code

const xArray = [55, 49, 44, 24, 15];
const yArray = ["Italy","France","Spain","USA","Argentina"];

const data = [{
x: xArray,
y: yArray,
type: "bar",
orientation: "h"
}];

const layout = {title:"World Wide Wine Production"};

Plotly.newPlot("myPlot", data, layout);

Try it Yourself »

## Pie Charts

To display a pie instead of bars, change x and y to labels and values, and change the type to "pie":

const data = [{
labels: xArray,
values: yArray,
type: "pie"
}];

Try it Yourself »

## Donut Charts

const data = [{
labels: xArray,
values: yArray,
hole: .4,
type: "pie"
}];

Try it Yourself »

## Plotting Equations

Try it Yourself »

### Source Code

let exp = "Math.sin(x)";

// Generate values
const xValues = [];
const yValues = [];
for (let x = 0; x <= 10; x += 0.1) {
yValues.push(eval(exp));
xValues.push(x);
}

// Display using Plotly
const data = [{x:xValues, y:yValues, mode:"lines"}];
const layout = {title: "y = " + exp};
Plotly.newPlot("myPlot", data, layout);

Try it Yourself »

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