MATLAB: Reading and renaming a variable from .mat file in appdesigner

Question

Hello,

I am facing a problem in appdesigner while loading a variable from the previously saved mat file.

I can load the .mat file in the appdesigner using load(file.mat).

This file.mat containes several variables and I need to access and rename one of the variables (this variable be used for further processing).

User enters the name of variable which needs to be renamed to another variable.

I have tried various approaches but whatever I do, a structure is formed from the variable name user enters with the variable of original file.mat in it.

load(app.FileName.Value) %File.mat which will also be entered by the user

DataProcessing = app.VariableName.Value; % The variable I need to access in File.mat

Any help in this regards would be highly appreciated.

Regards

Anum

Answer 1

It will be much simpler if you load into an output variable (which itself is a scalar structure):

S = load(app.FileName.Value);
Data = S.(app.VariableName.Value);

https://www.mathworks.com/help/matlab/matlab_prog/generate-field-names-from-variables.html