Saving figures into structure?

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Jared
Jared el 7 de Jun. de 2020
Respondida: Mohammad Alhashash el 24 de Sept. de 2021
Is it possible to save a figure into a structure? I'm trying to figure out how to save both data and figures into a single entity that I could then load in matlab. I know data can be saved in .mat and figures can be saved as .fig but is there not a way to save both in a single container?
  2 comentarios
Andreas Bernatzky
Andreas Bernatzky el 7 de Jun. de 2020
Hey Jared,
look here:
data = rand(10,2);
myStruct.structFig = plot(data);
myStruct.structData = data;
should do the job
Jared
Jared el 7 de Jun. de 2020
Editada: Jared el 7 de Jun. de 2020
Thanks Andreas. That's exactly what I was looking for. Follow up question...let's say I now have "structFig" in the structure but I close the actual figure in MATLAB. I now want to reopen the figure to see the actual figure. When I type:
myStruct.structFig
This doesn't work. All that does is tell me the structure i.e.,:
ans =
2×1 Line array:
Line
Line
I've tried open figure and that doesn't work either.
Thanks,
Jared

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Andreas Bernatzky
Andreas Bernatzky el 7 de Jun. de 2020
Hey Jared,
data = rand(10,2);
myStruct.structFig = plot(data);
myStruct.structData = data;
m = figure(2);
% does not actually work
% % set(m,myStruct.structFig.XData,'XData');
you should have a look at the set() command. I haven't found a solution yet. Easiest would be just plot the data again but here you loose all of your preset defines like thickness and such things.

Más respuestas (2)

Mohammad Alhashash
Mohammad Alhashash el 24 de Sept. de 2021
Yes you can by simply save the plotting command (plot, bar, ...) as a string, and then use eval command to excute it. However, keep in mind the the input arguments of the plotting command have to be stored as vectors in other fields in the same structure.
for example
% lets make a 2D plot of x and y values
s.x = [1, 2, 3];
s.y = [4, 5, 6];
s.figure = "plot(s.x, s.y)"
s = struct with fields:
x: [1 2 3] y: [4 5 6] figure: "plot(s.x, s.y)"
% to plot the figure later
eval(s.figure)

Ameer Hamza
Ameer Hamza el 7 de Jun. de 2020
Once a figure is closed, the associated data will be deleted and cannot be directly recovered. The only workaround is to create a class handle class with a transient property, as shown in my answer here: https://www.mathworks.com/matlabcentral/answers/521538-how-can-i-save-a-3d-rendering-as-a-fig

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