| 
            plpat
          ( | nlin , | 
| inc , | |
| del ); | 
      Sets the area line fill pattern to be used, e.g., for calls to plfill.
      The pattern consists of 1 or 2 sets of
      parallel lines with specified inclinations and spacings.  The
      arguments to this routine are the number of sets to use (1 or 2)
      followed by two vectors (with 1 or 2 elements)
      specifying the inclinations in tenths of a degree and the spacing in
      micrometers.  (See also plpsty)
    
nlin
          (PLINTNumber of sets of lines making up the pattern, either 1 or 2.
inc
          (PLINT_VECTOR
            A vector containing
            nlin
del
          (PLINT_VECTOR
            A vector containing
            nlin
Redacted form:
            General: plpat(inc, del)
          
This function is used in example 15.