DCL:GRPH2:UEPACK: Tone Fill Routines: Explanation of Subroutines
Sets the value of the tone level used by uetone with an array giving the grid-point values and the step size or the approximate number of levels.
NumRu::DCL.uegtlb(z,dx)
z, mx, nx, nySee uetone (Section 9.2.1) dx See uegtla (Section 9.2.3)