91 lines
1.7 KiB
Fortran
91 lines
1.7 KiB
Fortran
SUBROUTINE LFIT(X,Y,SIG,NDATA,A,MA,LISTA,MFIT,COVAR,NCVM,CHISQ)
|
|
PARAMETER (MMAX=50)
|
|
implicit real*8 (a-h,o-z)
|
|
real*8 x(*)
|
|
real*8 sig(*),y(*)
|
|
DIMENSION A(MA),LISTA(MA),
|
|
* COVAR(NCVM,NCVM),BETA(MMAX),AFUNC(MMAX)
|
|
|
|
KK=MFIT+1
|
|
DO 12 J=1,MA
|
|
IHIT=0
|
|
DO 11 K=1,MFIT
|
|
IF (LISTA(K).EQ.J) IHIT=IHIT+1
|
|
11 CONTINUE
|
|
IF (IHIT.EQ.0) THEN
|
|
LISTA(KK)=J
|
|
KK=KK+1
|
|
ELSE IF (IHIT.GT.1) THEN
|
|
PAUSE 'Improper set in LISTA'
|
|
ENDIF
|
|
12 CONTINUE
|
|
IF (KK.NE.(MA+1)) PAUSE 'Improper set in LISTA'
|
|
DO 14 J=1,MFIT
|
|
DO 13 K=1,MFIT
|
|
COVAR(J,K)=0.
|
|
13 CONTINUE
|
|
BETA(J)=0.
|
|
14 CONTINUE
|
|
DO 18 I=1,NDATA
|
|
CALL FUNCS(X(I),AFUNC,MA)
|
|
YM=Y(I)
|
|
IF(MFIT.LT.MA) THEN
|
|
DO 15 J=MFIT+1,MA
|
|
YM=YM-A(LISTA(J))*AFUNC(LISTA(J))
|
|
15 CONTINUE
|
|
ENDIF
|
|
SIG2I=1./SIG(I)**2
|
|
DO 17 J=1,MFIT
|
|
WT=AFUNC(LISTA(J))*SIG2I
|
|
DO 16 K=1,J
|
|
COVAR(J,K)=COVAR(J,K)+WT*AFUNC(LISTA(K))
|
|
16 CONTINUE
|
|
BETA(J)=BETA(J)+YM*WT
|
|
17 CONTINUE
|
|
18 CONTINUE
|
|
IF (MFIT.GT.1) THEN
|
|
DO 21 J=2,MFIT
|
|
DO 19 K=1,J-1
|
|
COVAR(K,J)=COVAR(J,K)
|
|
19 CONTINUE
|
|
21 CONTINUE
|
|
ENDIF
|
|
CALL GAUSSJ(COVAR,MFIT,NCVM,BETA,1,1)
|
|
DO 22 J=1,MFIT
|
|
A(LISTA(J))=BETA(J)
|
|
22 CONTINUE
|
|
CHISQ=0.
|
|
DO 24 I=1,NDATA
|
|
CALL FUNCS(X(I),AFUNC,MA)
|
|
SUM=0.
|
|
DO 23 J=1,MA
|
|
SUM=SUM+A(J)*AFUNC(J)
|
|
23 CONTINUE
|
|
CHISQ=CHISQ+((Y(I)-SUM)/SIG(I))**2
|
|
24 CONTINUE
|
|
c CALL COVSRT(COVAR,NCVM,MA,LISTA,MFIT)
|
|
RETURN
|
|
END
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|