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<!DOCTYPE html> <html> <body> <canvas id="myCanvas" width="400" height="400" style="border:1px solid grey"></canvas> <script> const canvas = document.getElementById("myCanvas"); const ctx = canvas.getContext("2d"); canvas.height = canvas.width; ctx.transform(1, 0, 0, -1, 0, canvas.height) 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]; 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, 3, 3, 0, 0, Math.PI * 2); ctx.fill(); } </script> </body> </html>
