Warning message for debugging/developme​nt

Put a call to dbwarn in your code when you change it temporarily for debugging/development purposes. For example, you change your code to load 'test.mat', rather than reading in a large, raw data file, and you don't want to forget to change it back.

When you run your code, you will be warned that the code has been changed temporarily for debugging/development purposes; the warning includes the name of the m-file that has been changed.