detreeexp42.m

支持向量机工具箱

global data textdata bad numobs
global  x y j quadclass tree
global dtnum dtnode dtclass 
 
[x,y] = meshgrid(1:.1:5,1:.1:5);
x = x(:);
y = y(:);
j = classify([x y],data(:,1:2),textdata);
gscatter(x,y,j,'grb','sod')
xlabel('Left-distance');
ylabel('Right-distance');
quadclass = classify(data(:,1:2),data(:,1:2),textdata,'quadratic');
bad = ~strcmp(quadclass,textdata);
sum(bad) / numobs;
hold off;