Subplots in a for loop- find the mistake

Question

Simon 2014-7-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/139712-subplots-in-a-for-loop-find-the-mistake

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!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Geoff Hayes 2014-7-1

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/139712-subplots-in-a-for-loop-find-the-mistake#answer_143207

在 MATLAB Online 中打开

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
显示无隐藏无

Simon 2014-7-1

在 MATLAB Online 中打开

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 2014-7-1

在 MATLAB Online 中打开

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