MATLAB: How to select a specific variable in the .mat file which contains different variables in the user interface

app designervariable

Hi! I want to design an app which can draw with a .mat file. How can I select a specific variable in the .mat file which contains different variables in the user interface? By 'text area' or something?

Best Answer

Use load() with return structure.

gongStruct = load('gong.mat'); 
fieldnames(gongStruct)

Use matfile object.

Help matfile

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MATLAB: How to change struct name in a loop

Although there is a MATLAB function to do this, but it is a very bad practice to name your variables like this. It will make your code error prone and hard to debug. Therefore I am going to suggest the correct way to solve the problem. You should create a struct array and store the input number as a field of the struct. For example

for ii=1:10
  X = input('which individual? ');
  s(i).individualNumber = X;
  s(i).length = ...;
end

It will take 10 inputs from user and store them in struct array.

MATLAB: Input Variable storage audio file

Starting with:

v = load('gong.mat');
audiowrite('gong.wav',v.y,v.Fs);

I would do either:

[y,Fs]=audioread('gong.wav');
Input_Signal = y;

or:

[Input_Signal,Fs]=audioread('gong.wav');

Both of these should work.

With respect to the rest, see the buttord and filtfilt function documentation for some valuable hints on how to filter a signal correctly.

Best Answer

Related Solutions

MATLAB: How to change struct name in a loop

MATLAB: Input Variable storage audio file

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