Function drawXYData

polynomial-regression/index.js:50–61

(canvas, xyData)

//   canvas: The canvas to draw the data in.
//   xyData: An Array of [x, y] Arrays.
function drawXYData(canvas, xyData) {
  drawAxes(canvas);
  const ctx = canvas.getContext('2d');
  for (let i = 0; i < xyData.length; ++i) {
    ctx.beginPath();
    const x = xyData[i][0];
    const y = xyData[i][1];
    const canvasCoord = world2canvas(canvas, x, y);
    ctx.arc(canvasCoord[0], canvasCoord[1], 4, 0, Math.PI * 2, true);
    ctx.stroke();
  }
}

// Calculate the arithmetic mean of a vector.
//