deleting variables from a .mat file

Question

Does anyone here know how to delete a variable from a matlab file? I know that you can add variables to an existing matlab file using the save -append

Answer 1

I suggest you load the variables from the .mat file you want to keep, and save them to a new .mat file. If necessary, you can load and save (using '-append') in a loop.

S = load(filename, '-mat', variablesYouWantToKeep);
save(newFilename,'-struct',S,variablesYouWantToKeep);
%# then you can delete the old file
delete(filename)