Grafika: Canvas
HTML Canvas nuqtali diagrammalar uchun juda mos
HTML Canvas chiziqli grafiklar uchun juda mos
HTML Canvas nuqtalar va chiziqlarni birlashtirish uchun juda mos
Nuqtali diagrammalar
Manba kodi
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];
// Plot Scatter
ctx.fillStyle = "red";
for (let i = 0; i < xArray.length-1; i++) {
let x = xArray[i]*400/150;
let y = yArray[i]*400/15;
ctx.beginPath();
ctx.ellipse(x, y, 2, 3, 0, 0, Math.PI * 2);
ctx.fill();
}
Chiziqli grafiklar
Manba kodi
const xMax = canvas.height = canvas.width;
const slope = 1.2;
const intercept = 70;
// Plot Line
ctx.beginPath();
ctx.moveTo(0, intercept);
ctx.lineTo(xMax, xMax * slope + intercept);
ctx.stroke();
Birlashtirilgan
Manba kodi
let xMax = canvas.height;
let yMax = canvas.width;
let slope = 1.2;
let intercept = 70;
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];
// Plot Scatter
ctx.fillStyle = "red";
for (let i = 0; i < xArray.length-1; i++) {
let x = xArray[i] * xMax/150;
let y = yArray[i] * yMax/15;
ctx.beginPath();
ctx.ellipse(x, y, 2, 3, 0, 0, Math.PI * 2);
ctx.fill();
}
// Plot Line
ctx.beginPath();
ctx.moveTo(0, intercept);
ctx.lineTo(xMax, xMax * slope + intercept);
ctx.stroke();
Sun’iy intellektni o‘rganishda plotter obyektiga ega bo‘lish juda qulay:
- Sun’iy intellektni qiziqarliroq qiladi
- Sun’iy intellektni ko‘rgazmaliroq qiladi
- Sun’iy intellektni tushunarliroq qiladi
Plotter obyektini yaratish
Misol
function XYPlotter(id) {
this.canvas = document.getElementById(id);
this.ctx = this.canvas.getContext("2d");
this.xMin = 0;
this.yMin = 0;
this.xMax = this.canvas.width;
this.yMax = this.canvas.height;
.
.
Chiziq chizish uchun metod qo‘shish
Misol
this.plotLine = function(x0, y0, x, y, color) {
this.ctx.moveTo(x0, y0);
this.ctx.lineTo(x, y);
this.ctx.strokeStyle = color;
this.ctx.stroke();
}
XY qiymatlarini o‘zgartirish uchun metod qo‘shish
Misol
this.transformXY = function() {
this.ctx.transform(1, 0, 0, -1, 0, this.canvas.height)
}
Nuqtalarni chizish uchun metod qo‘shish
Misol
this.plotPoints = function(n, xArr, yArr, color, radius = 3) {
for (let i = 0; i < n; i++) {
this.ctx.fillStyle = color;
this.ctx.beginPath();
this.ctx.ellipse(xArr[i], yArr[i], radius, radius, 0, 0, Math.PI * 2);
this.ctx.fill();
}
}
Bir nechta tasodifiy nuqtalarni chizish
Misol
// Create a Plotter
let myPlotter = new XYPlotter("myCanvas");
// Create random XY Points
numPoints = 500;
const xPoints = Array(numPoints).fill(0).map(function(){return Math.random() * myPlotter.xMax});
const yPoints = Array(numPoints).fill(0).map(function(){return Math.random() * myPlotter.yMax});
// Plot the Points
myPlotter.plotPoints(numPoints, xPoints, yPoints, "blue");
Kodni kutubxonaga joylashtirish
Manba kodi
function XYPlotter(id) {
this.canvas = document.getElementById(id);
this.ctx = this.canvas.getContext("2d");
this.xMin = 0;
this.yMin = 0;
this.xMax = this.canvas.width;
this.yMax = this.canvas.height;
// Plot Line Function
this.plotLine = function(x0, y0, x, y, color) {
this.ctx.moveTo(x0, y0);
this.ctx.lineTo(x, y);
this.ctx.strokeStyle = color;
this.ctx.stroke();
}
// Transform XY Function
this.transformXY = function() {
this.ctx.transform(1, 0, 0, -1, 0, this.canvas.height)
}
// Pot Points Function
this.plotPoints = function(n, xArr, yArr, color, radius = 3) {
for (let i = 0; i < n; i++) {
this.ctx.fillStyle = color;
this.ctx.beginPath();
this.ctx.ellipse(xArr[i], yArr[i], radius, radius, 0, 0, Math.PI * 2);
this.ctx.fill();
}
}
} // End Plotter Object
Uni faylga saqlang (masalan, "myplotlib.js")
Uni HTML sahifalaringizda ishlatish
Endi plotter obyektingizni HTML sahifalaringizga qo‘shishingiz mumkin:
W3Schools Pathfinder
Yutuqlaringizni kuzating – bu bepul!