How to take values from a matlab file

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Max-Henri Froger 2020-5-15

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评论： Max-Henri Froger 2020-5-16

Hi everyone,

I am on matlab 2016b. I am creating a function an appdesigner. I am asking the user to choose a matlab file. The configuration of the matlab files will always be like the photo below.

In this file, I am only interesting by the table name "essai". Like you see in the code below, I trying to import the data from the file but it's not working. I would only take the table named "essai" to save it and load it in another function.

I need help to solve this problem.

thanks

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Answer 1

Geoff Hayes 2020-5-15

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Max-Henri - since you are loading a mat file, perhaps you can use load instead. Something like

[filename, pathname] = uigetfile({'*.mat'},'Please select a MATLAB file');
if ~isempty(pathname) && ~isempty(filename)
    app.FileNameEditField.Value = filename;
    myData = load(fullfile(pathname, filename));
    if isfield(myData, 'essai')
        essai = myData.essai;
        save('essai.mat', 'essai');
    end
end

The above is untested but I think it straightforward. Note how we use fullfile to create the correct path fo the file and how we check to make sure that 'essai' is a valid field of the data before we try to save it to file.