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Extract data from matlab default plots

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Ahmed Alsaadi
Ahmed Alsaadi 2019-2-10
回答： Star Strider 2019-2-10
I have this code that plots the response of a structure to an excitation signal. MATLAB has two functions that do the work, as you may see in my code that I am using those function (modalfrf and modalfit). I want to extract the data in those plots and re-plot them against other variables. My question is "How can I extract the x-axis and y-axis data from those default plots?"
I have attached my code along with two .mat files that are needed to run the code.
Fs = 4000
modalfrf(ex_signal(1:1024) ,ACC,Fs,1000);
[frf,fff] = modalfrf(ex_signal(1:1024),ACC,Fs,1000);
modalfit(frf,fff,Fs,15,'FitMethod','lsrf');
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Image Analyst
Image Analyst 2019-2-10
Did you try
ax = gca;
xdata = ax.XData;
or something like that?
Ahmed Alsaadi
Ahmed Alsaadi 2019-2-10
Yes, I tried it but I got an error that says
"No appropriate method, property, or field 'XData' for class 'matlab.graphics.axis.Axes'."

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Star Strider
Star Strider 2019-2-10
Call it with as many outputs as you need, then use the outputs in your subsequent calculations:
[frf,f,coh] = modalfrf(___)
You can also plot the outputs, or call modalfit separately without outputs to do the plot you want.

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