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mnmnot.F
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*
* $Id: mnmnot.F,v 1.1.1.1 2000/06/08 11:19:20 andras Exp $
*
* $Log: mnmnot.F,v $
* Revision 1.1.1.1 2000/06/08 11:19:20 andras
* import of MINUIT from CERNlib 2000
*
* Revision 1.1.1.1 1996/03/07 14:31:30 mclareni
* Minuit
*
*
#include "minuit/pilot.h"
SUBROUTINE MNMNOT(FCN,ILAX,ILAX2,VAL2PL,VAL2MI,FUTIL)
#include "minuit/d506dp.inc"
CC Performs a MINOS error analysis on one parameter.
CC The parameter ILAX is varied, and the minimum of the
CC function with respect to the other parameters is followed
CC until it crosses the value FMIN+UP.
CC
#include "minuit/d506cm.inc"
EXTERNAL FCN,FUTIL
DIMENSION XDEV(MNI),W(MNI),GCC(MNI)
CHARACTER*4 CPOS,CNEG,CSIG
PARAMETER (CPOS='POSI',CNEG='NEGA')
C . . save and prepare start vals
ISW2 = ISW(2)
ISW4 = ISW(4)
SIGSAV = EDM
ISTRAV = ISTRAT
DC = DCOVAR
LNEWMN = .FALSE.
APSI = EPSI*0.5
ABEST=AMIN
MPAR=NPAR
NFMXIN = NFCNMX
DO 125 I= 1, MPAR
125 XT(I) = X(I)
DO 130 J= 1, MPAR*(MPAR+1)/2
130 VTHMAT(J) = VHMAT(J)
DO 135 I= 1, MPAR
GCC(I) = GLOBCC(I)
135 W(I) = WERR(I)
IT = NIOFEX(ILAX)
ERP(IT) = 0.
ERN(IT) = 0.
CALL MNINEX(XT)
UT = U(ILAX)
IF (NVARL(ILAX) .EQ. 1) THEN
ALIM(ILAX) = UT -100.*W(IT)
BLIM(ILAX) = UT +100.*W(IT)
ENDIF
NDEX = IT*(IT+1)/2
XUNIT = SQRT(UP/VTHMAT(NDEX))
MARC = 0
DO 162 I= 1, MPAR
IF (I .EQ. IT) GO TO 162
MARC = MARC + 1
IMAX = MAX(IT,I)
INDX = IMAX*(IMAX-1)/2 + MIN(IT,I)
XDEV(MARC) = XUNIT*VTHMAT(INDX)
162 CONTINUE
C fix the parameter in question
CALL MNFIXP (IT,IERR)
IF (IERR .GT. 0) THEN
WRITE (ISYSWR,'(A,I5,A,I5)')
+ ' MINUIT ERROR. CANNOT FIX PARAMETER',ILAX,' INTERNAL',IT
GO TO 700
ENDIF
C . . . . . Nota Bene: from here on, NPAR=MPAR-1
C Remember: MNFIXP squeezes IT out of X, XT, WERR, and VHMAT,
C not W, VTHMAT
DO 500 ISIG= 1,2
IF (ISIG .EQ. 1) THEN
SIG = 1.0
CSIG = CPOS
ELSE
SIG = -1.0
CSIG = CNEG
ENDIF
C . sig=sign of error being calcd
IF (ISW(5) .GT. 1) WRITE (ISYSWR,806) CSIG,ILAX,CPNAM(ILAX)
806 FORMAT (/' DETERMINATION OF ',A4,'TIVE MINOS ERROR FOR PARAMETER',
+ I3, 2X ,A)
IF (ISW(2).LE.0) CALL MNWARN('D','MINOS','NO COVARIANCE MATRIX.')
NLIMIT = NFCN + NFMXIN
ISTRAT = MAX(ISTRAV-1,0)
DU1 = W(IT)
U(ILAX) = UT + SIG*DU1
U(ILAX) = MIN(U(ILAX),BLIM(ILAX))
U(ILAX) = MAX(U(ILAX),ALIM(ILAX))
DELU = U(ILAX) - UT
C stop if already at limit with negligible step size
IF (ABS(DELU)/(ABS(UT)+ABS(U(ILAX))) .LT. EPSMAC) GO TO 440
FAC = DELU/W(IT)
DO 185 I= 1, NPAR
185 X(I) = XT(I) + FAC*XDEV(I)
IF (ISW(5) .GT. 1) WRITE (ISYSWR,801) ILAX,UT,DELU,U(ILAX)
801 FORMAT (/' PARAMETER',I4,' SET TO',E11.3,' + ',E10.3,' = ',E12.3)
C loop to hit AMIN+UP
KE1CR = ILAX
KE2CR = 0
XMIDCR = U(ILAX)
XDIRCR = DELU
C
AMIN = ABEST
NFCNMX = NLIMIT - NFCN
CALL MNCROS(FCN,AOPT,IERCR,FUTIL)
IF (ABEST-AMIN .GT. 0.01*UP) GO TO 650
IF (IERCR .EQ. 1) GO TO 440
IF (IERCR .EQ. 2) GO TO 450
IF (IERCR .EQ. 3) GO TO 460
C . error successfully calculated
EROS = XMIDCR-UT + AOPT*XDIRCR
IF (ISW(5) .GT. 1) WRITE (ISYSWR,808) CSIG,ILAX,CPNAM(ILAX),EROS
808 FORMAT (/9X,4HTHE ,A4, 29HTIVE MINOS ERROR OF PARAMETER,I3, 2H
+, ,A10, 4H, IS ,E12.4)
GO TO 480
C . . . . . . . . failure returns
440 IF (ISW(5) .GE. 1) WRITE(ISYSWR,807) CSIG,ILAX,CPNAM(ILAX)
807 FORMAT (5X,'THE ',A4,'TIVE MINOS ERROR OF PARAMETER',I3,', ',A,
+', EXCEEDS ITS LIMIT.'/)
EROS = UNDEFI
GO TO 480
450 IF (ISW(5) .GE. 1) WRITE (ISYSWR, 802) CSIG,ILAX,NFMXIN
802 FORMAT (9X,'THE ',A,'TIVE MINOS ERROR',I4,' REQUIRES MORE THAN',
+ I5,' FUNCTION CALLS.'/)
EROS = 0.
GO TO 480
460 IF (ISW(5) .GE. 1) WRITE (ISYSWR, 805) CSIG,ILAX
805 FORMAT (25X,A,'TIVE MINOS ERROR NOT CALCULATED FOR PARAMETER',I4/)
EROS = 0.
C
480 IF (ISW(5) .GT. 1) WRITE (ISYSWR,'(5X, 74(1H*))')
IF (SIG .LT. ZERO) THEN
ERN(IT) = EROS
IF (ILAX2.GT.0 .AND. ILAX2.LE.NU) VAL2MI = U(ILAX2)
ELSE
ERP(IT) = EROS
IF (ILAX2.GT.0 .AND. ILAX2.LE.NU) VAL2PL = U(ILAX2)
ENDIF
500 CONTINUE
C . . parameter finished. reset v
C normal termination
ITAUR = 1
CALL MNFREE(1)
DO 550 J= 1, MPAR*(MPAR+1)/2
550 VHMAT(J) = VTHMAT(J)
DO 595 I= 1, MPAR
WERR(I) = W(I)
GLOBCC(I) = GCC(I)
595 X(I) = XT(I)
CALL MNINEX (X)
EDM = SIGSAV
AMIN = ABEST
ISW(2) = ISW2
ISW(4) = ISW4
DCOVAR = DC
GO TO 700
C new minimum
650 LNEWMN = .TRUE.
ISW(2) = 0
DCOVAR = 1.
ISW(4) = 0
SAV = U(ILAX)
ITAUR = 1
CALL MNFREE(1)
U(ILAX) = SAV
CALL MNEXIN(X)
EDM = BIGEDM
C in any case
700 CONTINUE
ITAUR = 0
NFCNMX = NFMXIN
ISTRAT = ISTRAV
RETURN
END