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DCL:GRPH2:U[UVH]PACK : 1-F Graph Routines: Explanation of Subroutines: Finite Difference

6.7.1 UVDIF/UVDIFZ/UHDIF/UHDIFZ

1.

Function

Fills the space between 2 polylines with a tone pattern.

2.

Call

CALL UVDIF (N,X,Y1,Y2)
CALL UHDIF (N,X1,X2,Y)
CALL UVDIFZ(N,X,Y1,Y2,ITP1,ITP2)
CALL UHDIFZ(N,X1,X2,Y,ITP1,ITP2)

3.

Explanation of Parameters

N	(I)	The length of an array.
X, Y	(R(N))	Independent variables.
X1, X2, Y1, Y2	(R(N))	Dependent variables.
ITP1, ITP2	(I)	The tone pattern number. When X1<X2 or Y1<Y2, ITP1 is used. When X1>X2 or Y1>Y2, ITP2 is used.

4.

Notes

(a)

When RUNDEF  is specified as X or Y, it is considered that the points dividing the range defined by UUSIDV into N-1 equal sections have been specified. If the defined range is not specified, then the whole window is considered to be the defined range.

(b)

When RUNDEF  is specified as X1, Y1 or X2, Y2, it is considered that the value of the internal variable 'UREF' has been specified. The initial value of 'UREF' is 0.

(c)

The tone pattern used by UVDIF, UHDIF is specified by UUSARP.