Drawing a Line

A neuron as a classifier

An interactive lesson with 6 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• A single neuron with a threshold divides the plane with a straight line.
• The perceptron (1958) learns the line from examples.
• XOR can’t be separated by one line, so a single neuron can’t learn it.

Steps

1. Separate the dots
2. Watch it learn
3. One correction by hand
4. The XOR problem
5. Counting weights
6. Which side?