MATLAB: How to plot an existing MATLAB plots all in one figure using SUBPLOT

handle graphicsMATLABparentsubplot

I have four figures which are already plotted by another user, but I do not have the commands that he used to plot them. I am trying to plot them all in one figure using SUBPLOT command.

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One way is to obtain the ‘XData’ and ‘YData’ of all the children of the figures then plot them again in one figure using the SUBPLOT command.

The following example shows how to obtain the ‘XData’ and ‘YData’:

plot(1:10)  % for example this is your existing figure 
ha1 = get(gca,'Children') %this returns the children of the axes 
a1 = get(ha1,'Xdata') % obtain the XData 
b1 = get(ha1,'Ydata') % obtain the YData 
figure;   % new figure 
plot(a1,b1) %plot the data again

Similarly, obtain the XData and YData of all other figures then use SUBPLOT to plot them in one figure.

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MATLAB: How to plot existing MATLAB plots from different figures all in one figure using SUBPLOT in MATLAB

One way to achieve this is to obtain the 'XData' and 'YData' of all the children of the figures that need to be replotted and then plot them again in one figure using the SUBPLOT command.

The following example shows how to obtain the 'XData' and 'YData' for a plot from a figure:

plot(1:10)  % for example this is your existing figure
ha1 = get(gca,'Children') %this returns the children of the axes
a1 = get(ha1,'Xdata') % obtain the XData
b1 = get(ha1,'Ydata') % obtain the YData
figure;   % new figure
plot(a1,b1) %plot the data again

Similarly, obtain the XData and YData of all other figures then use SUBPLOT to plot them in one figure.

NOTE: If the figure has multiple plots (multiple children of the axes), an array of handles will be returned by the following command:

ha1 = get(gca,'Children')

MATLAB: How to superimpose plots from 2 (.fig) files

Hello Francis,

You were on the right track, but you only made one subplot. I'm assuming, since you're using subplot, that you want two separate axes on the figure. Here's a quick example of how you can do it with copyobj:

% Setup the figures
hFig1 = figure;
plot(1:10)
hold on
plot(2:20)
hFig2 = figure;
plot(10:-1:1)
hold on
plot(1:10)
% Create new figure and copy over
hFigTarget = figure;
hAxTar1 = subplot(2, 1, 1, 'Parent', hFigTarget);
hAxTar2 = subplot(2, 1, 2, 'Parent', hFigTarget);
hAx1 = hFig1.Children; % Assuming there's just one child
hAx2 = hFig2.Children;
copyobj(hAx1.Children, hAxTar1)
copyobj(hAx2.Children, hAxTar2)

Another way to do it would be to just copy over both axes, and change their 'Position' or 'OuterPosition' properties to simulate what subplot does. I personally find that this works pretty well to simulate subplots:

hAx1.Units = 'normalized';
hAx1.OuterPosition = [0 0.5 1 0.5];
hAx2.Units = 'normalized';
hAx2.OuterPosition = [0 0 1 0.5];

-Cam

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MATLAB: How to plot existing MATLAB plots from different figures all in one figure using SUBPLOT in MATLAB

MATLAB: How to superimpose plots from 2 (.fig) files

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