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C
C
C +-----------------------------------------------------------------+
C | |
C | Copyright (C) 1986 by UCAR |
C | University Corporation for Atmospheric Research |
C | All Rights Reserved |
C | |
C | NCARGRAPHICS Version 1.00 |
C | |
C +-----------------------------------------------------------------+
C
C
C ---------------------------------------------------------------------
C
FUNCTION AGMINI (SVAL,ZLOW,ZDRA,NVIZ,IIVZ,NEVZ,IIEZ)
C
DIMENSION ZDRA(1)
C
C The routine AGMINI returns the mimimum value of the elements in ZDRA
C specified by NVIZ, IIVZ, NEVZ, and IIEZ, skipping elements having the
C special value SVAL (or less than ZLOW, if ZLOW is not equal to SVAL).
C
C -- NVIZ is the number of vectors of data stored in ZDRA.
C
C -- IIVZ is the index increment from one data vector to the next.
C
C -- NEVZ is the number of elements per vector to be examined.
C
C -- IIEZ is the index increment from one vector element to the next.
C If IIEZ is 0, the array is ignored and 1. is returned.
C
AGMINI=1.
IF (IIEZ.EQ.0) RETURN
C
AGMINI=SVAL
INDZ=1-IIEZ
C
DO 103 I=1,NVIZ
IF (ZLOW.EQ.SVAL) THEN
DO 101 J=1,NEVZ
INDZ=INDZ+IIEZ
IF (ZDRA(INDZ).EQ.SVAL) GO TO 101
IF (AGMINI.EQ.SVAL) AGMINI=ZDRA(INDZ)
AGMINI=AMIN1(AGMINI,ZDRA(INDZ))
101 CONTINUE
ELSE
DO 102 J=1,NEVZ
INDZ=INDZ+IIEZ
IF (ZDRA(INDZ).EQ.SVAL.OR.ZDRA(INDZ).LT.ZLOW) GO TO 102
IF (AGMINI.EQ.SVAL) AGMINI=ZDRA(INDZ)
AGMINI=AMIN1(AGMINI,ZDRA(INDZ))
102 CONTINUE
END IF
INDZ=INDZ-NEVZ*IIEZ+IIVZ
103 CONTINUE
C
RETURN
C
END
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