Subplots in a for loop- find the mistake

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Simon
Simon 2014-7-1
评论： Geoff Hayes 2014-7-1
Dear all,
I want to create a plot with n subplots. The problem here is that all the subplots are the same (see picture), but they shouldn't as the data in the cell 'M' alters. I guess it is some mistake with 'hold off' (but I tried to put it nearly everywhere) or the looping of the cell, but can't find it.
figure
cl={'r','y','g'};
subplot(n+1,1,1),plot(P_est)
for m=2:n+1;
subplot(n+1,1,m);
hold off
for p=1:n;
for q=1:t;
xx=[q-1,q] ;
plot([ xx fliplr(xx) xx(1)],[0 0 1 1 0],cl{M{1,p}(q)+1},'linewidth',12)
hold on
end
end
end
Thanks!

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Geoff Hayes
Geoff Hayes 2014-7-1
I don't think that the hold off is the problem, and it can probably be removed due to the hold on that follows.
The outer loop, for m=2:n+1; updates each of the six (colourful!) subplots that follow the initial subplot. But aside from
subplot(n+1,1,m);
nothing else in that loop relies upon m. So in the block of code
for p=1:n;
for q=1:t;
xx=[q-1,q] ;
plot([ xx fliplr(xx) xx(1)],[0 0 1 1 0],cl{M{1,p}(q)+1},'linewidth',12)
hold on
end
end
there is no dependence upon m, and so each subplot will be drawn identically. It may be that the cell array M should include the m parameter (somehow).
  2 个评论
Simon
Simon 2014-7-1
To say it with Christoph Waltz: That's a BINGO ;)
Thanks! I changed the code to
for m=2:n+1;
subplot(n+1,1,m);
for q=1:t;
xx=[q-1,q] ;
plot([ xx fliplr(xx) xx(1)],[0 0 1 1 0],cl{M{1,m-1}(q)+1},'linewidth',12)
hold on
end
hold off
end
And now it works! By chance, do you know how I change the size of the subplots so the seven bars are smaller than the first plot?
Geoff Hayes
Geoff Hayes 2014-7-1
Awesome!
As for resizing the seven bars to be smaller than the first plot, you could try the following. Grab the position of the subplot (using its handle). The position will be a 4 element vector with [x y width height] components. Reduce the element that corresponds to height, and reset the position:
h = subplot(n+1,1,m); % get the handle to the subplot
plotDims = get(h,'Position'); % get the subplot dimensions
plotDims(4) = plotDims(4)/5; % shrink the height by a factor of 5
set(h,'Position', plotDims); % reset
Try doing this before you do the plotting, but if that doesn't work, then just do it once you've iterated over p.

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