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DCL:GRPH2:UDPACK: Contour Routines: Explanation of Subroutines

8.2.2 UDCNTZ

1.

Function

Draws a 2-D contour graph (using a work area given by the user).

2.

Call

CALL UDCNTZ(Z,MX,NX,NY,IBR,NBR3)

3.

Explanation of Parameters

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.

4.

Notes

(a)

The points to note when using this subroutine are basically the same as those for UDCNTR  (see previous section), except for the following note on the size of array.

(b)

The work area should be set to satisfy the following condition. When the bit length of 1 word is NB,

DX<0

NB inquires the internal variable 'NBITSPW' handled by  GLpGET/GLpSET. Normally, this value is 32. (See user's manual for "MATH1.")