Saving graphs while preserving all their characteristics

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Edwin Fonkwe 2012-3-10

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https://ww2.mathworks.cn/matlabcentral/answers/31834-saving-graphs-while-preserving-all-their-characteristics

编辑： Zachary 2020-8-3

Hello everyone,

I have this problem. Whenever I generate a plot using the "step" or "bode" commands for example and I save the figure, the next time I try to open it, all the characteristics are lost (like "peak response", "settling time", etc). So, I'm forced to do another "step" or "bode" plot. How do I save a plot while preserving all the characteristics?

I appreciate your help in advance.

e.

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Daniel Shub 2012-3-11

It would help if you show the code you use to generate and save the plot.

Zachary 2020-8-3

编辑：Zachary 2020-8-3

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+1 this question! I have never been able to share the rich interactive figures (i.e. the context menus) generated by the Control System Toolbox. I always have to share the script that generates the figure instead. Sometimes this is impractical.

Here is an example of the problem...

%Generate a response plot
fh = figure; %figure handle
ph = bodeplot(rss(1)); %resppack.bodeplot handle

savefig runs successfully on the figure handle, but I lose the the context menu and the resppack.bodeplot object.

savefig(fh) %only saves graphics

savefig errors on the bodeplot handle because ph isn't a figure handle.

savefig(ph) %errors

save runs with a warning because I should be using savefig for a figure. When loading fh or ph, I get stuck in an endless loop of listener warnings and the figure window opens multiple times (all of which lack context menus).

save myfile.mat fh ph %warning to use savefig instead
load myfile.mat fh %endless loop of warnings
load myfile.mat ph %endless loop of warnings

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Answer 1

Image Analyst 2012-3-11

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You might want to have a variable, a structure, called something like GraphSettings. Then you could save all the parameters in a single variable and then save it to a mat file and recall it easily. Like

GraphSettings.peakResponse = 42;
GraphSettings.settlingTime = 10;
GraphSettings.LineWidth = 2;
GraphSettings.LineColor= 'r';
% To save:
save('myAppsSettings.mat', 'GraphSettings');
% To recall
s = load('myAppsSettings.mat');
GraphSettings = s.GraphSettings;

Then you use GraphSettings to rebuild your graph. You might want to have a function called something like "BuildGraph" that does everything necessary to build your graph from the data and the other settings saved in GraphSettings.

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Edwin Fonkwe 2012-3-11

Thanks for ur response, though it doesn't quite solve my problem.

Say I define the transfer function:

G = tf(1,[1 1]) and I use the command:

bode(G);

From the resulting figure, I click File->Save As. As long as the figure is open, I can always right-click and show peak response, and minimum stability margins. If I close and re-open the figure, it is no longer possible to show these characteristics. So, is it possible, (from the figure), to save the plot with all its characteristics? I hope my problem is clearer.

regards

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