extracthelp extracts the help lines of all M-files found int he current folder and writes them in corresponding files in a specified sub-folder.
The function is very useful in combination with the 'pcode'. The function pcode creates a pre-parsed P-files, that can be distributed to users who should not have access to the original code. However the P-files do not preserve the help information of the original functions. The 'extracthelp' function exports only the help information, thus allowing the users to use the 'help' function as usual.
extracthelp() % create the help M-files in a \phelp folder
pcode *.m % convert all .M files to .P files
The \phelp folder contains thus the files you can safely distribute.