%%%%% 感知機模型 %%%%%%%%
function [w,b] = Perceptron(x, y, w, b, a, Iter)
% 其中a爲學習率 Iter爲迭代次數
for i = 1:Iter
num = 0;
for j = 1:length(y)
if y(j)*(w*x(:,j)+b) <= 0
num = num+1;
w = w+a*y(j)*x(:,j)'; %w更新
b = b+a*y(j); %b更新
end
end
if num == 0 %若num=0,則說明誤分類點數爲0,停止迭代,輸出w,b
break;
end
end
例子
clc
clear
x = [3,4,1;3,3,1]; y = [1,1,-1];
w = [0,0]; b = 0; %初值設置
a = 1;%學習率
Iter = 10; %迭代次數
[w,b] = Perceptron(x, y, w, b, a, Iter)