Give this:
We have a wrongn classified point, how to move the line to come closer to the points?
We apply learning rate and since wrong point is in positive area, we need to W - learning rate * wrong cord
The same, if the wrong point in negivate area, we do : W + learing rate * wrong cord:
For the second example, where the line is described by 3x1+ 4x2 - 10 = 0, if the learning rate was set to 0.1, how many times would you have to apply the perceptron trick to move the line to a position where the blue point, at (1, 1), is correctly classified?
Answer: 10 times
[Intro to Deep Learning with PyTorch -- L2 -- N9] Perceptron Trick
原文：https://www.cnblogs.com/Answer1215/p/13062878.html