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Even if you had a convenient function to delete variables from a MAT file, it would be inefficient.

Consider splitting the data up and saving each variable to a different MAT file, using directories for organization if necessary. The variable is still in there, but it is empty.ġ0 GB of data? Updating multi-variable MAT files could get expensive due to MAT format overhead. > save('savetest.mat','A','-append') %# Overwrite A in the fileĪnd now the file size will be around 169 bytes. Now do this: > A = %# Set the variable A to empty > whos -file savetest.mat %# Look at the. > save('savetest.mat','A') %# Save A to a file Here's an example: > A = rand(1000) %# Create a 1000-by-1000 matrix of random values mat file, but it will be empty and thus reduce the total file size. There will still be a variable called A in the. mat file is called A, you can save over that variable with a new copy of A (that you've set to ) using the -append option. Note this excerpt from the documentation (bold added by me):įor MAT-files, -append adds new variables to the file or replaces the saved values of existing variables with values in the workspace. Please try again with a smaller file.Interestingly enough, you can use the -append option with SAVE to effectively erase data from a. Delete Remove No selected version Reset This field is required You are already subscribed to this topic Attach screenshot The file you uploaded exceeds the allowed file size of 20MB. Release notes and upgrades Click to open the dropdown menu. Explore products Click to go to the page. The available release versions for this topic are listed There is no specific version for this documentation. You were redirected to a related topic instead. The topic you requested does not exist in the release. Please try again or submit your comments. You have been unsubscribed from this content Thank you for your feedback. You are now subscribed to and will receive notifications if any changes are made to this page. You have been unsubscribed from all topics. Subscribe Subscribed Unsubscribe Last updated: Tags: January February March April May June July August September October November December No Results Found Versions Search preferences successfully updated My release version successfully updated My release version successfully deleted An error has occurred.