MATLAB: Linking GUI to MATLAB code (m-file)

guiguidematlab guiplotplotting

Hi,

I am trying to create a GUI wherein the user has to input 2 values and the result will be a plot. In short, the m-file should take the input from the GUI and run the code. But I am unable to link the GUI with the m-file. It looks like after saving the .fig it also creates .m file for the GUI. My query where exactly should I place the code (m-file with the plot) in the GUI m.file so that I get the results.

Pardon me for a basic question like this since I am new to matlab.

Waiting for the reply.

Thanks in advance

–Sanjeev

Best Answer

Put the code with the plotting routine in a different file. The call to the code would go in the callback of a uicontrol, such as in the callback of a pushbutton if you are using the pushbutton to signal that the plotting should proceed.

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MATLAB: Code (m-file) to sample the signal

Try this (assuming it's not your homework, because you didn't tag it as homework):

% Formula for a cosine is cos(2 * pi * t / period).
% So, 200 * pi = 2 * pi / period, so period = 2/200 = 0.01.
% Thus 10 periods would mean a max t of 10 * 0.01 = 0.1.
% Sampling rate is 400 Hz, or one sample every 1/400 of a second.
% Number of Samples = (elasped time) / (time per sample)
numSamples = round(0.1 / (1/400))
% That is only 40 and gives a severe undersampling of the signal
% giving a weird shape.
% Make up a t axis going from 0 to 0.1 with numSamples samples.
t = linspace(0, 0.1, numSamples);
xt = 4 * cos(200 * pi * t);
plot(t, xt, 'b.-', 'LineWidth', 2, 'MarkerSize', 15);
grid on;
title('x(t) vs. t', 'FontSize', fontSize);
xlabel('t', 'FontSize', fontSize);
ylabel('x(t)', 'FontSize', fontSize);

MATLAB: Execute the .m file from GUI

In the callback code for the push button, add a line which is just the name of the .m file. For example if the .m file is AnotherFunction.m then the line to add would be

AnotherFunction

Best Answer

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MATLAB: Code (m-file) to sample the signal

MATLAB: Execute the .m file from GUI

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