*-- Author : S.Burke / J.V. Morris
DOUBLE PRECISION FUNCTION FKCHPR(NPROB,NFREE,IERR)
**********************************************************************
* *
* Inverse chi-sq probability *
* *
* ERROR CONDITIONS; *
* IERR = 0 ; normal termination *
* -> IERR = 101 ; invalid probability cut *
* -> IERR = 104 ; invalid value of NPROB or NFREE *
* *
* -> Fatal error *
* *
* The function returns -1 for error 4, 0 or 10**10 for error 1 *
* *
**********************************************************************
IMPLICIT DOUBLE PRECISION (A-H,O-Z)
PARAMETER (IUTIL=1,IROUT=9)
*KEEP,FKECODE.
PARAMETER (IWARN=0,IFATAL=1,IFPRO=2,IFFLT=3,IFSMO=4,IFPRS=5,
& IFPAS=6,IFPAF=7)
PARAMETER (IINF1=1,IINF2=2,IINF3=3,IINV=4,IDONE=5)
PARAMETER (IICV=6,IMCV=7,IOCV=11,IRCV=12,IOVCV=13,
& ITHGP2=16,ITHG1=17)
PARAMETER (IFREE=20,IFREE1=30,IFREE2=40,IFREE3=50)
*KEND.
*KEEP,FKNPL.
CHARACTER*5 CKDBG
PARAMETER (CKDBG='FKDBG')
PARAMETER (NPL=72)
LOGICAL LTRUE,LFIRST,LTRPL,LTRPLD
DOUBLE PRECISION TRUE,RTRUE,CHITRU,SPRO,CPRO,SFIL,CFIL
&, SSMT,CSMT,SSMTR,CSMTR,DPRO,CBPRO,QPRO,QGAIN
&, RPRO,CRPRO,RFIL,CRFIL,RSMT,CRSMT,CHIFIL,CHISMT
*
* Per-track values can go in H1WORK; note that LTRUE and LFIRST must
* be set at least per event.
*
* This is about 36k words long; the remaining common blocks are
* about 3.6k in total. Some of this could be in /H1WORK/, but the
* blocks would have to be reorganised.
*
COMMON /H1WORK/
* /FKPROJ/
& SPRO(5,NPL),CPRO(5,5,NPL)
* /FKFILT/
&, SFIL(5,NPL),CFIL(5,5,NPL)
* /FKSMTH/
&, SSMT(5,NPL),CSMT(5,5,NPL)
&, SSMTR(5,NPL),CSMTR(5,5,NPL)
* /FKINT/
&, DPRO(5,5,NPL),CBPRO(5,5,NPL),QPRO(5,5,NPL)
&, QGAIN(5,5,NPL),IAPROX,LFIRST
* /FKRSID/
&, RPRO(2,NPL),CRPRO(2,2,NPL),RFIL(2,NPL)
&, CRFIL(2,2,NPL),RSMT(2,NPL),CRSMT(2,2,NPL)
&, CHIFIL(NPL),CHISMT(NPL)
* /FKTRUE/
&, TRUE(5,NPL),RTRUE(5,NPL),CHITRU(NPL),LTRUE
* /FKDBG/
&, LTRPL(NPL),LTRPLD(NPL)
*KEEP,FKRJCT.
DOUBLE PRECISION CHITOT,X2PCUT,X2CUTB,X2CUTA,X2CUTN
&, X2PCTI,X2CTBI,X2CTAI,X2CTNI
LOGICAL LWIRE,LPRINI
COMMON /FKRJCT/ X2PCUT,X2CUTB,X2CUTA,X2CUTN
&, X2PCTI,X2CTBI,X2CTAI,X2CTNI
&, CHITOT(NPL),NDF(NPL)
&, NBLOCK(NPL),NBADP(NPL),NBADB(NPL)
&, NFAILP(NPL),NFAILB(NPL),NNEWP(NPL)
&, NUNRJP(NPL),NUNRJB(NPL),NRERJP(NPL)
&, NCPRS,NBPRS,NCPAS,NPASS,IRJCT(NPL)
&, LWIRE(NPL),LPRINI
*KEND.
**********************************************************************
REAL PROB
DIMENSION PCUT(8),CHISQ(4,2*NPL)
EQUIVALENCE(PCUT,X2PCUT)
SAVE CHISQ
PARAMETER (NDIM=8*NPL)
DATA CHISQ/NDIM*-1.D0/
**********************************************************************
IERR = 0
IF (NPROB.LE.0 .OR. NPROB.GT.4 .OR. NFREE.LE.0) THEN
CALL FKERR(IUTIL,IROUT,IFATAL,IINV,IERR)
FKCHPR = -1.D0
RETURN
ENDIF
IF (NFREE.LE.2*NPL .AND. CHISQ(NPROB,NFREE).GE.0.D0) THEN
FKCHPR = CHISQ(NPROB,NFREE)
RETURN
ENDIF
PROB = 1.D0 - PCUT(NPROB)
IF (PROB.LT.0.D0 .OR. PROB.GT.1.D0)
& CALL FKERR(IUTIL,IROUT,IFATAL,IINF1,IERR)
IF (PROB.LE.0.D0) THEN
FKCHPR = 0.D0
ELSEIF (PROB.GE.1.D0) THEN
FKCHPR = 1.D10
ELSE
FKCHPR = CHISIN(PROB,NFREE)
ENDIF
IF (NFREE.LE.2*NPL) CHISQ(NPROB,NFREE) = FKCHPR
RETURN
END
*