FCQX(3)

SYNOPSIS
SUBROUTINE FCQX (LUN, KPRINT, IPASS)

NAME
fcqx - Quick check for FC.

LIBRARY
SLATEC

TYPE
SINGLE PRECISION (FCQX-S, DFCQX-D)

KEYWORDS
QUICK CHECK

AUTHOR
Hanson, R. J., (SNLA)

DESCRIPTION
Quick check subprogram for the subroutine FC. Fit discrete data by an S-shaped curve. Evaluate the fitted curve, its first two derivatives, and probable error curve. Use subprogram FC to obtain the constrained cubic B-spline representation of the curve. The values of the coefficients of the B-spline as computed by FC and the values of the fitted curve as computed by BVALU in the de Boor package are tested for accuracy with the expected values. See the example program in the report sand78-1291, pp. 22-27. The dimensions in the following arrays are as small as possible for the problem being solved.

ROUTINES CALLED
BVALU, CV, FC, IVOUT, R1MACH, SCOPY, SMOUT, SVOUT

REVISION HISTORY (YYMMDD)
780801 DATE WRITTEN
890718 Changed references from BVALUE to BVALU. (WRB)
890911 Removed unnecessary intrinsics. (WRB)
891004 Changed computation of XVAL. (WRB)
891004 REVISION DATE from Version 3.2
891214 Prologue converted to Version 4.0 format. (BAB)
901010 Restructured using IF-THEN-ELSE-ENDIF, modified tolerances to use R1MACH(4) rather than R1MACH(3) and cleaned up FORMATs. (RWC)
930214 Declarations sections added, code revised to test error returns for all values of KPRINT and code polished. (WRB)