Is it possible to subplot confusion matrices?

Question

I'm plotting several confusion matrices using plot_confusion() function and I want to put them in a subplot (2x5 figures), but it does not seem to work.It displays every confusion matrix separately. Are there any restriction for plotting confusion? Thanks!

figure

Subplot(2,1,1);

plotconfusion(targets,outputs,'train');

subplot(2,1,2);

plotconfusion(targets1,outputs1,'test')

Answer 1

You're "not supposed" to do that (the functionality is not included), but you can trick Matlab a little, because at the end of a day it's just an axes object:

%% First Example Data
[x,t] = cancer_dataset;
net = patternnet(10);
net = train(net,x,t);
y = net(x);

%// plot
plotconfusion(t,y)

%// get handle and enable second plöt
cp1 = gcf;
cp1.NextPlot = 'new'
ax1 = findobj(cp1,'Type','Axes')

%% Second Example Data
[x,t] = cancer_dataset;
net = patternnet(5);
net = train(net,2*x,t);
y = net(x);

%// plot
plotconfusion(t,y)

%// get handle and enable third plöt
cp2 = gcf;
cp2.NextPlot = 'new'
ax2 = findobj(cp2,'Type','Axes')

%% combine plots

f1 = figure(42)
f1s1 = subplot(121)
copyobj(allchild(ax1),f1s1)
f1s2 = subplot(122)
copyobj(allchild(ax2),f1s2)

You loose the labels and titles and may need to adjust the axis, but I guess you're able to do that.