detreeexp2_2.m

支持向量机工具箱

 %设置全局变量 Weight MPG Model_Year bad numobs
global WM Model_Year bad numobs

%散点图
gscatter(WM(:,1),WM(:,2),Model_Year,'crk','odv');
xlabel('车重(吨)');
ylabel('里/加仑');

%线性分类
linclass = classify(WM(:,1:2),WM(:,1:2),Model_Year);

%计算错误分类
bad = ~strcmp(linclass,Model_Year);
numobs = size(WM,1);
sum(bad) / numobs;

%在散点图上显示错误分类 用x表示
hold on;
plot(WM(bad,1),WM(bad,2), 'kx');
hold off;