detreeexp33.m

来自「具有图形操作界面的支持向量机多类分类实验系统.全部用Matlab实现,可以实现多」· M 代码 · 共 22 行

global data textdata bad numobs
global  x y j quadclass tree
global dtnum dtnode dtclass 
global  grpnum node grpname

tree = treefit(data(:,1:2), textdata);
[dtnum,dtnode,dtclass] = treeval(tree, data(:,1:2));
bad_d = ~strcmp(dtclass,textdata);
numobs = size(data,1);
sum(bad_d) / numobs
 
%% We use the same technique as above to visualize the regions assigned to each textdata.
% 
[grpnum,node,grpname] = treeval(tree, [x y]);
gscatter(x,y,grpname,'grb','sod')
xlabel('Head-Width(毫米)');
ylabel('Weight(毫克)');

hold on;
plot(data(bad_d,1), data(bad_d,2), 'kx');
hold off;