W3Schools Tryit 编辑器 - W3Schools 中文教程

<!DOCTYPE html>
<html>
<script src="myailib.js"></script>
<script src="myplotlib.js"></script>
<body>
<canvas id="myCanvas" width="400px" height="400px" style="width:100%;max-width:400px;border:1px solid black"></canvas>
<p>Train me to find the line of best fit:</p>
<p>
<button onclick="train(100)">100 times</button>
<button onclick="train(200)">200 times</button>
<button onclick="train(300)">300 times</button>
<button onclick="train(500)">500 times</button>
</p>

<div id="demo"></div>
<script>
// Create a Trainer Object
xArray = [32,53,61,47,59,55,52,39,48,52,45,54,44,58,56,48,44,60];
yArray = [31,68,62,71,87,78,79,59,75,71,55,82,62,75,81,60,82,97];
let myTrainer = new Trainer(xArray, yArray);

// Create a Plotter Object
let myPlotter = new XYPlotter("myCanvas");
myPlotter.transformXY();
myPlotter.transformMax(100, 100);

// Plot the Points
myPlotter.plotPoints(xArray.length, xArray, yArray, "blue");

function train(iter) {
  myTrainer.train(iter);
  // Display Guessed Results
  document.getElementById("demo").innerHTML = 
  "<p>Slope: " + myTrainer.weight.toFixed(2) + "</p>" +
  "<p>Bias:  " + myTrainer.bias.toFixed(2) + "</p>" +
  "<p>Cost:  " + myTrainer.cost.toFixed(2);
  myPlotter.plotLine(0, myTrainer.bias, myPlotter.xMax,myPlotter.xMax*(myTrainer.weight)+(myTrainer.bias), "black");
}

</script>

</body>
</html>