realpath

Updated version of realpath by M MA using suggestions made on that file submission and additional testing. Works for Windows, may need some tweaks for Unix. Substantially faster than original version in testing.

Resolves relative paths and extra filesep characters in the input.

Syntax:
OUTPUT = REALPATH(THEPATH)

where THEPATH is the path to a file or folder, which should exist.

Example:
realpath('../myfile.txt');
% returns /home/user/whatever/myfile.txt