problem with saving variables to .mat file- the variables of the old .mat files are changing after saving new ones

Hello,

I have a function that does some calculations and saves the important variables to a .mat file with a specific name so the variables are the same but the name of the file is different. Every time that I save a new .mat file the variables on the older files changes their values to the new ones (their name is not changing).

This is how I save:

name=sprintf('Fisher_Hough_test_SNR_%f_window_size_%d_overlap_%d_percent.mat',SNR,bin_size,overlapping); 
save(name,'noisy','F_fin','app_slow','wave_ang','snr','F_results','H_results','H_density','H_superdensity','Hscatter_s_d', '-v7.3');

Any suggestions?

[Walter Roberson]

How have you determined that the older files change content?

[Gil Averbuch]

By looking at their values

[Titus Edelhofer]

Strange. The file should only change it's content if you touch it again (i.e., save to the same file)...? Can you verify (e.g. by time stamp of the file) that the file itself has not changed/was updated?

[Walter Roberson]

Please be more specific about how you are "looking at their values"

Please dir() one of the older files before the save() and store the result in a variable, and then dir() the same file again after the save to a different file, and store the result in a different variable, and then compare the two structures to see if there are differences (in particular differences in the timestamps)

Answer 1

[Thorsten]

That's not possible. You have probably overwritten the old mat files. Please double check your code. If you still think that this happens, please provide a minimal example that reproduces this behavior such that we can have a look.

[Gil Averbuch]

I found the problem. Matlab opened the latest figures that was saved every time instead of printing again the old ones.