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Plotting on .fig file (in new window if possible)

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LB on 9 Oct 2019
Edited: LB on 10 Oct 2019
I am trying to open a figure and plot additional data on it. The figure was given to me as a .fig file so I do not have the data to recreate it.
To open the file, I am using the following code:
fig = openfig('filename');
However that opens it in the script tab and not as a new figure window. How can I open it in a new figure window like all my other plots?
Once I have that opened (regardless of in new window or not), how do I plot on it?
I am trying
hold on
But that doesn't seem to be working.
Any help is greatly appreciated.


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Stephan on 10 Oct 2019
Upload the file means to attach the .fig file i guess- not a picture of it.

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Accepted Answer

Walter Roberson
Walter Roberson on 9 Oct 2019
Figures are container objects that cannot be directly drawn to. You can only plot() into axes. Axes are contained inside figures or inside uipanels (or a small number of other container types.)
In order to draw, you will need to either select an existing axes or else create a new axes inside the figure.
%get the figure
fig = openfig('filename');
%pull out the right axes
fig_axes = findobj(fig, 'type', 'axes');
selected_axes_idx = 2; %set as appropriate for your purpose
ax = fig_axes(selected_axes_idx);
%do the additional drawing
hold(ax, 'on');
x = linspace(-2*pi,2*pi);
y1 = cos(x);
plot(ax, x, y1, 'color', 'b');
hold(ax, 'off');


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LB on 10 Oct 2019
Hi Walter,
That still didn't work. I am attaching the .fig file if you would like to test it
Walter Roberson
Walter Roberson on 10 Oct 2019
I tested with the .fig you posted earlier, and it worked fine for me.
Which MATLAB release are you using?
LB on 10 Oct 2019
Hi Walter,
Ignore my previous comment about it not working. I had many other figures in my code and it was plotting it on those instead of the one I wanted to plot it on. So I created an empty script just for this section of the code.
Thanks so much for your help!

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More Answers (1)

Ankit on 9 Oct 2019
Here is an example:
close all;
MySavedPlot = open('MySavedPlot.fig');
hold on
x = linspace(-2*pi,2*pi);
y1 = cos(x);


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