Plotly.js
Plotly.js 是一個圖表庫，提供超過 40 種圖表型別、3D 圖表、統計圖和 SVG 地圖。
散點圖
原始碼
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];
// 定義資料
const data = [{
x: xArray,
y: yArray,
mode:"markers",
type:"scatter"
}];
// 定義佈局
const layout = {
xaxis: {range: [40, 160], title: "平方米"},
yaxis: {range: [5, 16], title: "百萬美元"},
title: "房價與面積"
};
Plotly.newPlot("myPlot", data, layout);
折線圖
原始碼
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];
// 定義資料
const data = [{
x: xArray,
y: yArray,
mode: "lines",
type: "scatter"
}];
// 定義佈局
const layout = {
xaxis: {range: [40, 160], title: "平方米"},
yaxis: {range: [5, 16], title: "百萬美元"},
title: "房價與面積"
};
// 使用 Plotly 顯示
Plotly.newPlot("myPlot", data, layout);
線性圖
原始碼
let exp = "x + 17";
// 生成值
const xValues = [];
const yValues = [];
for (let x = 0; x <= 10; x += 1) {
yValues.push(eval(exp));
xValues.push(x);
}
// 定義資料
const data = [{
x: xValues,
y: yValues,
mode: "lines"
}];
// 定義佈局
const layout = {title: "y = " + exp};
// 使用 Plotly 顯示
Plotly.newPlot("myPlot", data, layout);
多行
原始碼
let exp1 = "x";
let exp2 = "1.5*x";
let exp3 = "1.5*x + 7";
// 生成值
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));
}
// 定義資料
const data = [
{x: x1Values, y: y1Values, mode:"lines"},
{x: x2Values, y: y2Values, mode:"lines"},
{x: x3Values, y: y3Values, mode:"lines"}
];
// 定義佈局
const layout = {title: "[y=" + exp1 + "] [y=" + exp2 + "] [y=" + exp3 + "]"};
// 使用 Plotly 顯示
Plotly.newPlot("myPlot", data, layout);
柱狀圖
原始碼
const xArray = ["義大利","法國","西班牙","美國","阿根廷"];
const yArray = [55, 49, 44, 24, 15];
const data = [{
x: xArray,
y: yArray,
type: "bar" }];
const layout = {title:"全球葡萄酒產量"};
Plotly.newPlot("myPlot", data, layout);
水平條形圖
原始碼
const xArray = [55, 49, 44, 24, 15];
const yArray = ["義大利","法國","西班牙","美國","阿根廷"];
const data = [{
x: xArray,
y: yArray,
type: "bar",
orientation: "h"
}];
const layout = {title:"全球葡萄酒產量"};
Plotly.newPlot("myPlot", data, layout);
餅圖
要顯示餅圖而不是條形圖，請將 x 和 y 更改為標籤和值，並將 type 改為 "pie"
const data = [{
labels: xArray,
values: yArray,
type: "pie"
}];
甜甜圈圖
要顯示甜甜圈圖而不是餅圖，請新增一個孔
const data = [{
labels: xArray,
values: yArray,
hole: .4,
type: "pie"
}];
繪製方程
原始碼
let exp = "Math.sin(x)";
// 生成值
const xValues = [];
const yValues = [];
for (let x = 0; x <= 10; x += 0.1) {
yValues.push(eval(exp));
xValues.push(x);
}
// 使用 Plotly 顯示
const data = [{x:xValues, y:yValues, mode:"lines"}];
const layout = {title: "y = " + exp};
Plotly.newPlot("myPlot", data, layout);
