| 1 | DOUBLE PRECISION FUNCTION CHISQ(F)
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| 2 |
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| 3 | C-----------------------------------------------------------------------
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| 4 | C CHI SQ(UARE)
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| 5 | C
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| 6 | C THIS FUNCTION CALCULATES THE CHI**2 OBTAINED WITH THE FITFUNCTION
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| 7 | C AMOEBA USING THE PARAMETER SET F
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| 8 | C F(1) = HEIGHT AT MAXIMUM
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| 9 | C F(2) = SHOWER STARTING POINT
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| 10 | C F(3) = T AT MAXIMUM
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| 11 | C F(4) = WIDTH PARAMETER 1
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| 12 | C F(5) = WIDTH PARAMETER 2 T
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| 13 | C F(6) = WIDTH PARAMETER 3 T**2
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| 14 | C THIS FUNCTION IS CALLED FROM LONGFT AND FROM AMOEBA
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| 15 | C-----------------------------------------------------------------------
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| 16 |
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| 17 | IMPLICIT NONE
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| 18 | *KEEP,CURVE.
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| 19 | COMMON /CURVE/ CHAPAR,DEP,ERR,NSTP
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| 20 | DOUBLE PRECISION CHAPAR(1100),DEP(1100),ERR(1100)
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| 21 | INTEGER NSTP
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| 22 | *KEEP,RUNPAR.
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| 23 | COMMON /RUNPAR/ FIXHEI,THICK0,HILOECM,HILOELB,
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| 24 | * STEPFC,NRRUN,NSHOW,PATAPE,MONIIN,
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| 25 | * MONIOU,MDEBUG,NUCNUC,
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| 26 | * CETAPE,
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| 27 | * SHOWNO,ISHW,NOPART,NRECS,NBLKS,MAXPRT,NDEBDL,
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| 28 | * N1STTR,MDBASE,
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| 29 | * DEBDEL,DEBUG,FDECAY,FEGS,FIRSTI,FIXINC,FIXTAR,
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| 30 | * FIX1I,FMUADD,FNKG,FPRINT,FDBASE
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| 31 | * ,GHEISH,GHESIG
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| 32 | COMMON /RUNPAC/ DSN,HOST,USER
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| 33 | DOUBLE PRECISION FIXHEI,THICK0,HILOECM,HILOELB
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| 34 | REAL STEPFC
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| 35 | INTEGER NRRUN,NSHOW,PATAPE,MONIIN,MONIOU,MDEBUG,NUCNUC,
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| 36 | * SHOWNO,ISHW,NOPART,NRECS,NBLKS,MAXPRT,NDEBDL,
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| 37 | * N1STTR,MDBASE
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| 38 | INTEGER CETAPE
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| 39 | CHARACTER*79 DSN
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| 40 | CHARACTER*20 HOST,USER
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| 41 |
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| 42 | LOGICAL DEBDEL,DEBUG,FDECAY,FEGS,FIRSTI,FIXINC,FIXTAR,
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| 43 | * FIX1I,FMUADD,FNKG,FPRINT,FDBASE
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| 44 | * ,GHEISH,GHESIG
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| 45 | *KEND.
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| 46 |
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| 47 | DOUBLE PRECISION AUXIL,BALL,BASE,EXPO,F(6),T
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| 48 | INTEGER I
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| 49 | C-----------------------------------------------------------------------
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| 50 |
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| 51 | IF ( DEBUG ) WRITE(MDEBUG,*) 'CHISQ : PARAMETERS =',F
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| 52 |
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| 53 | C EXCLUDE PATHOLOGICAL PARAMETER SETTINGS
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| 54 | IF ( F(1) .LE. 0.D0 .OR. F(2) .GE. F(3) .OR.
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| 55 | * (F(4).EQ.0.D0 .AND. F(5).EQ.0.D0 .AND. F(6).EQ.0.D0) ) THEN
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| 56 | CHISQ = 1.D16
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| 57 | RETURN
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| 58 | ENDIF
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| 59 |
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| 60 | CHISQ = 0.D0
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| 61 | C LOOP OVER THE LONGITUDINAL DISTRIBUTION
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| 62 | DO 1 I=1,NSTP
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| 63 | T = DEP(I)
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| 64 | IF ( T .GT. F(2) ) THEN
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| 65 | BASE = (T-F(2)) / (F(3)-F(2))
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| 66 | AUXIL = F(4) + T*F(5) + T**2*F(6)
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| 67 | IF ( AUXIL .LT. 1.D-20 ) THEN
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| 68 | CHISQ = CHISQ + 1.D16
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| 69 | GOTO 1
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| 70 | ENDIF
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| 71 | EXPO = (F(3)-T) / AUXIL
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| 72 | CC IF(DEBUG)WRITE(MDEBUG,*)'CHISQ : I,BASE,EXPO=',I,
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| 73 | CC * SNGL(BASE),SNGL(EXPO)
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| 74 | BALL = F(1) * BASE ** EXPO
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| 75 | ELSE
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| 76 | BALL = 0.D0
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| 77 | ENDIF
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| 78 | CHISQ = CHISQ + ((BALL-CHAPAR(I))/ERR(I))**2
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| 79 | 1 CONTINUE
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| 80 | CHISQ = CHISQ / (NSTP-6)
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| 81 |
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| 82 | IF ( DEBUG ) WRITE(MDEBUG,*) 'CHISQ : CHI**2 =',SNGL(CHISQ)
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| 83 |
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| 84 | RETURN
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| 85 | END
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