I found the following function:
what do I not to do to be able to save that function to my matlab and is there a way somebody else who hasen't downloaded that file is still able to see what it's doing?
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At the bottom of that page there is a header
below which there is a link for drawaxis.m . Click on that link to download the file. Put the file in a convenient location on your MATLAB path.
Anyone who wishes to execute your code will need a copy of the file. You could include it along with your code.