MATLAB File Help: prtNewPreProc
  prtNewPreProc creates a new prtClass* M-file
    prtNewPreProc creates a new prtPreProc* M-file including definitions for
    all required methods and properties for prtPreProc objects.  By
    convention, prtPreProc M-files should start with the string prtPreProc, and
    file names must be valid MATLAB function names (no special characters,
    spaces, etc.)
    prtNewPreProc(FILENAME) enables the user to specify the name of the new
    prtPreProc object from the command line.