W3Schools 试用编辑器 - W3Schools 中文教程

<!DOCTYPE html>

<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>

// Create a Trainer Object
const xArray = [32,53,61,47,59,55,52,39,48,52,45,54,44,58,56,48,44,60];
const 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);

// Generate values
let weight = 0.1 
let xValues = [];
let yValues = [];
for (let x = 0; x <= 100; x += 10) {
  yValues.push(x*weight);
  xValues.push(x);
}

let data = [
  {x:xArray, y:yArray, mode:"markers"},
  {x:xValues, y:yValues, mode:"lines"}
];

// Define Layout
const layout = {
  xaxis: {range: [0,100], title: "Square Meters"},
  yaxis: {range: [0,100], title: "Price in Millions"},
  title: "House Prices vs. Size"}
;

// Display using Plotly
Plotly.newPlot("myPlot", data, layout);

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);

Plotly.newPlot("myPlot", data, layout);
}

</script>

</body>
</html>