WHICH  WHICH Get Information on Function


Usage
 
 Returns information on a function (if defined).  The usage is
 
    which(fname)
 
 where fname is a string argument that contains the name of the 
 function.  For functions and scripts defined
 via .m files, the which command returns the location of the source
 file:
 
    y = which(fname)
 
 will return the filename for the .m file corresponding to the given
 function, and an empty string otherwise.
 