create a matfile within a matfile in matlab

In MATLAB, you can create a matfile within a matfile using the matfile function.

Here's a sample code that will create a matfile parent.mat with a nested matfile named child.mat.

main.m
% Create a matfile object for the parent file
parent = matfile('parent.mat','Writable',true);

% Create a matfile object for the child file
child = matfile('child.mat','Writable',true);

% Assign the child matfile object to the parent matfile object
parent.child = child;
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Now you can use the child object to add variables to the child.mat file, and they will be nested within the parent.mat file.

main.m
% Add variables to the child matfile
child.var1 = 1;
child.var2 = 2;
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Note that when you access the child variables through the parent, MATLAB will automatically load the child.mat file into memory. So, be aware of the size of the variables you store in the matfile, as they may cause memory issues.