CHFIE(3)

SYNOPSIS
REAL FUNCTION CHFIE (X1, X2, F1, F2, D1, D2, A, B)

NAME
chfie - Evaluates integral of a single cubic for PCHIA

LIBRARY
SLATEC (PCHIP)

TYPE
SINGLE PRECISION (CHFIE-S, DCHFIE-D)

AUTHOR
Fritsch, F. N., (LLNL)

DESCRIPTION
CHFIE: Cubic Hermite Function Integral Evaluator. Called by PCHIA to evaluate the integral of a single cubic (in Hermite form) over an arbitrary interval (A,B). ---------------------------------------------------------------------- Calling sequence: REAL X1, X2, F1, F2, D1, D2, A, B REAL VALUE, CHFIE VALUE = CHFIE (X1, X2, F1, F2, D1, D2, A, B) Parameters: VALUE -- (output) value of the requested integral. X1,X2 -- (input) endpoints if interval of definition of cubic. F1,F2 -- (input) function values at the ends of the interval. D1,D2 -- (input) derivative values at the ends of the interval. A,B -- (input) endpoints of interval of integration.

SEE ALSO
PCHIA

ROUTINES CALLED
(NONE)

REVISION HISTORY (YYMMDD)
820730 DATE WRITTEN
820805 Converted to SLATEC library version.
870813 Minor cosmetic changes.
890411 1. Added SAVE statements (Vers. 3.2). 2. Added SIX to REAL declaration.
890411 REVISION DATE from Version 3.2
891214 Prologue converted to Version 4.0 format. (BAB)
900315 CALLs to XERROR changed to CALLs to XERMSG. (THJ)
900328 Added TYPE section. (WRB)
910408 Updated AUTHOR section in prologue. (WRB)
930503 Corrected to set VALUE=0 when IERR.ne.0. (FNF)
930504 Eliminated IERR and changed name from CHFIV to CHFIE. (FNF)