DCL:GRPH2:UDPACK: Contour Routines: Explanation of Subroutines
Draws a 2-D contour graph (using a work area given by the user).
z (R) A 2-D array of mx * ny. The nx * ny portion is used for drawing the contour. mx (I) The first adjustable dimension of array z. nx (I) The first adjustable dimension of array z used for drawing contour. ny (I) The second adjustable dimension of array z used for drawing contour. ibr (I) The array used as work area. nbr3 (I) The length of array ibr.
nb inquires the internal variable 'NBITSPW' handled by glpget/glpset. Normally, this value is 32. (See user's manual for "MATH1.")