Matlab save individual subplot as jpg

Question

In a for loop, I create a variable number of subplots that are displayed on a single figure. Can I also save each subplot as a separate, full size plot and image file (preferably JPG)?

Answer 1

Use copyobj to a new figure and then use saveas with the new figure handle:

Example code that YOU should have provided (see SSCCE):

figure
nLines = 2;
nColumns = 3;
handles = zeros(nLines,nColumns)
for line = 1:nLines
  for column = 1:nColumns
    handles(line,column)=subplot(nLines,nColumns,column+(line-1)*nColumns);
    plot([line column]);
    title(sprintf('Cool title (%d,%d)',line,column))
    ylabel(sprintf('Ylabel yeah (%d,%d)',line,column))
    xlabel(sprintf('Xlabel nah (%d,%d)',line,column))
  end
end

Here I have the subplot handles saved, but supposing you don't have them saved:

axesH = findobj(gcf,'Type','axes','-not','Tag','legend'); % This will change the order from which the axes will be saved. If you need to save in the correct order, you will need access to the subplot handles
nAxes = numel(axesH)
newFig = figure;
for k=1:nAxes
   newAxes=copyobj(axesH(k),newFig);
   % Expand subplot to occupy the hole figure:
   set(newAxes,'OuterPosition',[0 0 1 1]);
   tightInset=get(newAxes,'TightInset');
   set(newAxes,'Position',[tightInset(1:2) [1 1]-(tightInset(3:4)+tightInset(1:2))])
   saveas(newFig,sprintf('axes_%d.jpg',k),'jpg');
   delete(newAxes);
end
delete(newFig);

Example of one axes saved:

To remove the deadspace I used information available on this topic.