how to subplot n figures (pcolor) using for loop (matlab)

Question

I have n saved fig files (all the figures are pcolor figure) and I want to plot all the figures in one new subplot (n X 2). Can anyone please help me out here? I will be really really grateful :)

    % Open each figure and copy content
    for i = 1:nFig
        % Open fig-i
        filename = fullfile(rep,list(i).name);
        fighand =  openfig(filename,'invisible');

            h=subplot(nFig,2,i);


        % Close fig-i
        close(fighand)
    end

Welcome to Stack Overflow! Please take the tour and read up on How to Ask. It is unclear what you'd like us to do, and especially what the code you post here does. Can you please edit the question to clarify and modify the code to a minimal reproducible example, i.e. a piece of code demonstrating the problem which we can run. Thus, provide sample inputs (presumably two .fig files, you can create those with random data) and sample output (presumably the figure with two subplot). — Adriaan

rinkert rinkert · Accepted Answer · 2020-09-30T11:38:05

You can use copyobj to copy the contents of an existing axes to a target axes. See comments for explanation:

N = 4;

%% generate some figs
fig = cell(1,N);

for k = 1:N
    fig{k} = figure(k);
    fig{k}.Name = sprintf('fig_%i', k);
    pcolor(rand(10));
    
    xlabel(sprintf('some xlabel %i',k))
    ylabel(sprintf('some ylabel %i',k))
    savefig(fig{k}, fig{k}.Name)
end


%% load figs and make nice subplot
fig_all = figure(99);clf;
for k = 1:N
    % load figure
    fig_tmp = openfig(sprintf('fig_%i', k),'invisible');
    % set fig_all as the current figure again
    figure(fig_all);
    % create target axes
    ax_target = subplot(N/2,2,k);
    pcolor(ax_target, rand(5)*0.001); cla; % plot some random pcolor stuff to setup axes correctly

    % get the source data and copy to target axes
    ax_src = fig_tmp.Children;
    copyobj(ax_src.Children, ax_target);
    % set axes properties of target to those of the source
    ax_target.XLim = ax_src.XLim;
    ax_target.YLim = ax_src.YLim;
    
    % copy the axes labels
    ax_target.XLabel.String = ax_src.XLabel.String;
    ax_target.YLabel.String = ax_src.YLabel.String;
end

how to subplot n figures (pcolor) using for loop (matlab)

1 Answers