Sandbox 01
Train a Real Classifier
A genuine perceptron — the simplest kind of trainable model — running entirely in your browser. Move the decision boundary yourself, then hit auto-train and watch the same gradient-style update rule converge on a working classifier, one labeled example at a time.
See this sandbox in its lesson context Not spam Spam Misclassified
Drag the boundary yourself and try to separate the two colors perfectly — that’s you doing what a model’s training loop does automatically. Then hit “Auto-train” and watch the perceptron learning rule nudge the line, one pass over the data at a time, toward the same answer.
45% correct · pass 0