Merging 4 separate subplots in 1 figure having 4 subplots - matlab

Question

I have 4 different figures. Each figure contains 2 subplots (2 rows and 1 column)
The figures can be generated using the following code.
y = [2 2 3; 2 5 6; 2 8 9; 2 11 12];
for i = 1 : 4
figure(i)
subplot(2,1,1)
bar(y)
subplot(2,1,2)
bar(y)
end
Having these 4 figures, is it possible to combine them in 1 figure?
the solution provided does not work with this other example where I create the figure using barwitherr..why?
for i = 1 : 4
figure(i)
subplot(2,1,1)
barwitherr([1 2 3 4;1 2 1 2], [5 6 7 8;1 2 3 4])
subplot(2,1,2)
barwitherr([1 2 3 4;1 2 1 2], [5 6 7 8;1 2 3 4])
end
for i = 1:4
figure(i);
ax = gca;
f = get(ax, 'children');
figure(5);
s = subplot(2, 2, i);
copyobj(f, s);
end

Answer 1

This may not be exactly what you want but is very extensible. You can loop through each of the original 4 figures and get handles for each of the subplots within it. Once the figure we are interested in using figure(i) is the current gcf object we can get a handle to each of the subplot elements with s = subplot(2, 1, i) providing we know the structure of the subplots and i is the subplot we are interested in.
We can then we use copyobj() and allchild() to copy over each of the subplots to a new subplot in the new figure
copyobj(allchild(h), s)
allchild() copies over all of the information in barwitherr() that is left out from the code you've copied from a previous edit of my answer to your question.
If we put all this together we can produce the full code as
for i = 1:4
figure(5);
n = i + (i - 1);
s1 = subplot(4, 2, n);
s2 = subplot(4, 2, n+1);
h = figure(i);
hs1 = subplot(2, 1, 1);
hs2 = subplot(2, 1, 2);
copyobj(allchild(hs1), s1)
copyobj(allchild(hs2), s2)
end
n = i + (i - 1); is used to replicate the original ordering. The output produced by this is