How to loop through a set of variables Y1..Y100
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Ahmed AKL
el 28 de Feb. de 2018
Hi,
I've a group of matrix named Y1 .. Y100. Each matrix is 7244x1 (complex number).
I want to loop through them (Y1..Y100) so in each iteration I can plot the 7244x1 values.
How can I iterate through them?
Thanks in advance
6 comentarios
Ahmed AKL
el 1 de Mzo. de 2018
Sure, it will be nice if you can find a way to import the data in a better format.
The analyzer captures the RF signal and exports it to a .mat file (it doesn't give me any option to configure the format). Then I go to Matlab and load the .mat file, so I've a punch of data in my workspace as I explained in the question.
Do you have a solution for this?
Stephen23
el 1 de Mzo. de 2018
Editada: Stephen23
el 1 de Mzo. de 2018
"Do you have a solution for this?"
Yes, as I already wrote, just load the data into a variable. This was also explained in the tutorial that I gave you a link to: did you read it? See my answer for how this can be applied to your situation.
Respuesta aceptada
Stephen23
el 1 de Mzo. de 2018
Editada: Stephen23
el 27 de Jun. de 2019
"it will be nice if you can find a way to import the data in a better format."
Of course, it is simpler and more efficient to load into an output a structure and then access its fieldnames:
figure()
hold on
S = load(...);
For k = 1:100
plot(real(S.(sprintf('Y%d',k))))
end
So easy! By simply avoiding eval I wrote more efficient code using fewer characters: when beginners learn to avoid eval then they also write simpler, less buggy, more efficient code:
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Más respuestas (1)
jonas
el 28 de Feb. de 2018
Editada: jonas
el 1 de Mzo. de 2018
Try this:
figure;hold on
for i=1:100;
plot(eval(sprintf(['Y',num2str(i)])));
end
For more info: https://se.mathworks.com/matlabcentral/answers/57445-faq-how-can-i-create-variables-a1-a2-a10-in-a-loop
EDIT: For future reference, Stephen gave a better solution below. Only use EVAL() if it is absolutely necessary (which it rarely is, if ever?). See link for more info.
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