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  • Committer: Package Import Robot
  • Author(s): Ole Streicher
  • Date: 2014-04-22 14:44:58 UTC
  • Revision ID: package-import@ubuntu.com-20140422144458-okiwi1assxkkiz39
Tags: upstream-13.09pl1.2+dfsg
Import upstream version 13.09pl1.2+dfsg

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applic/fit/libsrc/funct2i.for
 
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C @(#)funct2i.for       19.1 (ES0-DMD) 02/25/03 13:17:38
 
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C===========================================================================
 
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C Copyright (C) 1995 European Southern Observatory (ESO)
 
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C
 
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C This program is free software; you can redistribute it and/or 
 
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C modify it under the terms of the GNU General Public License as 
 
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C published by the Free Software Foundation; either version 2 of 
 
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C the License, or (at your option) any later version.
 
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C
 
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C This program is distributed in the hope that it will be useful,
 
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C but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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C GNU General Public License for more details.
 
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C
 
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C You should have received a copy of the GNU General Public 
 
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C License along with this program; if not, write to the Free 
 
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C Software Foundation, Inc., 675 Massachusetss Ave, Cambridge, 
 
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C MA 02139, USA.
 
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C
 
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C Corresponding concerning ESO-MIDAS should be addressed as follows:
 
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C       Internet e-mail: midas@eso.org
 
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C       Postal address: European Southern Observatory
 
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C                       Data Management Division 
 
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C                       Karl-Schwarzschild-Strasse 2
 
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C                       D 85748 Garching bei Muenchen 
 
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C                       GERMANY
 
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C===========================================================================
 
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C
 
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      SUBROUTINE FUNC2I(NRPRM,PRM,FCT,GRD,PIXEL,WEIGHT,IDIM1,IDIM2,           
 
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     +                    IDIM3)                                                
 
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C+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++        
 
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C                                                                               
 
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C.MODULE                                                                        
 
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C       FIT                                                                     
 
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C                                                                               
 
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C.NAME                                                                          
 
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C       FUNCT2_I                                                                
 
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C                                                                               
 
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C.PURPOSE                                                                       
 
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C       Function to compute the sum of residuals and the gradient.              
 
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C       for FIT/IMAGE                                                           
 
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C                                                                               
 
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C.KEYWORDS                                                                      
 
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C       Approximating Function.                                                 
 
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C                                                                               
 
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C.DESCRIPTION                                                                   
 
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C       Trivial                                                                 
 
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C                                                                               
 
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C.LANGUAGE                                                                      
 
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C       FORTRAN                                                                 
 
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C                                                                               
 
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C.CALLING SEQUENCE                                                              
 
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C      CALL LSFUN2(NRPRM,PRM,FCT,GRD                                            
 
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C    +                     PIXEL,WEIGHT,IDIM1,IDIM2,IDIM3)                      
 
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C                                                                               
 
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C.INPUT PARAMETERS                                                              
 
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C       NRPRM               INTEGER  Number of parameters                       
 
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C       PRM (NRPRM)         DOUBLE   Parameters                                 
 
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C       PIXEL (IDIM_)       REAL     pixel values of the image                  
 
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C       WEIGHT (IDIM_)      REAL     weighting factors                          
 
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C       IDIM_               INTEGER  dimension of the 3-dim image.              
 
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C                                                                               
 
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C.MODIFIED PARAMETERS                                                           
 
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C       none                                                                    
 
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C                                                                               
 
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C.OUTPUT PARAMETERS                                                             
 
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C       FCT                 DOUBLE   Sum of residuals                           
 
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C       GRD (NRPRM)         DOUBLE   Gradient                                   
 
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C                                                                               
 
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C.FILES                                                                         
 
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C       FIT_NAG.INC/NOLIST                                                      
 
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C                                                                               
 
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C.MODULES CALLED                                                                
 
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C       FTFUNC                                                                  
 
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C                                                                               
 
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C.AUTHOR                                                                        
 
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C       Ph. DEFERT,      Feb 1986                                               
 
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C                                                                               
 
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C.MODIFICATIONS                                                                 
 
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C                                                                               
 
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C                                                                               
 
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C-----------------------------------------------------------------------        
 
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C      IMPLICIT NONE                                                            
 
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C     ..                                                                        
 
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C     .. Scalar Arguments ..                                                    
 
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      INTEGER NRPRM,IDIM1,IDIM2,IDIM3                                           
 
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      DOUBLE PRECISION FCT                                                      
 
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C     ..                                                                        
 
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C     .. Array Arguments ..                                                     
 
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      DOUBLE PRECISION PRM(NRPRM),GRD(NRPRM)                                    
 
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      REAL PIXEL(IDIM1,IDIM2,IDIM3),WEIGHT(IDIM1,IDIM2,IDIM3)                   
 
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C     ..                                                                        
 
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C     .. Scalars in Common ..                                                   
 
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      INTEGER NRCOL,ISTAR                                                       
 
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      CHARACTER WGTTYP*1                                                        
 
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C     ..                                                                        
 
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C     .. Arrays in Common ..                                                    
 
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      INTEGER ICOL(10)                                                          
 
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C     ..                                                                        
 
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C     .. Local Scalars ..                                                       
 
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      DOUBLE PRECISION W,Y,Y1,YOUT,YY                                           
 
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      INTEGER IFUN,K,BEGFCT,I1,I2,I3,IP                   
 
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C     ..                                                                        
 
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C     .. Local Arrays ..                                                        
 
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      REAL X(10)                                                       
 
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C     ..                                                                        
 
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C     .. Common blocks ..                                                       
 
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C     ..                                                                        
 
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C     .. External Files ..                                                      
 
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       INCLUDE 'MID_INCLUDE:FITNAGI.INC/NOLIST'                                 
 
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      DOUBLE PRECISION PARDER(MAXPAR)                                 
 
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       INCLUDE 'MID_INCLUDE:FITNAGC.INC/NOLIST'                                 
 
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      COMMON /LSQFUN/ICOL,NRCOL,ISTAR,WGTTYP                                    
 
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C     ..                                                                        
 
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C     .. Executable Statements ..                                               
 
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C                                                                               
 
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C  Deal with simple linear constraints                                          
 
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C                                                                               
 
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      DO 10 K = 1,NRPRM                                                         
 
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          IP     = FIXPAR(K)                                                    
 
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          IF (IP.GT.0) THEN                                                     
 
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              PRM(K) = PRM(IP)*PRPFAC(K)                                        
 
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              PARAM(K) = PRM(K)                                                 
 
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          END IF                                                                
 
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          GRD(K) = 0.                                                           
 
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   10 CONTINUE                                                                  
 
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C                                                                               
 
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C  Go through the image                                                         
 
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C                                                                               
 
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      X(1)   = START(1)                                                         
 
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      X(2)   = START(2)                                                         
 
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      X(3)   = START(3)                                                         
 
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      FCT    = 0.                                                               
 
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      DO 60 I3 = 1,IDIM3                                                        
 
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          DO 50 I2 = 1,IDIM2                                                    
 
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              DO 40 I1 = 1,IDIM1                                                
 
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C                                                                               
 
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C   compute weights                                                             
 
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C                                                                               
 
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                  Y      = PIXEL(I1,I2,I3)                                      
 
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                  IF (WGTTYP(1:1).EQ.'C') THEN                                  
 
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                      W      = 1.                                               
 
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                  ELSE IF (WGTTYP(1:1).EQ.'W') THEN                             
 
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                      W      = WEIGHT(I1,I2,I3)                                 
 
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                  ELSE IF (WGTTYP(1:1).EQ.'S') THEN                             
 
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                      YY     = ABS(Y)                                           
 
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                      IF (YY.LT.1.E-12) THEN                                    
 
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                          W      = 1.                                           
 
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                      ELSE                                                      
 
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                          W      = 1./YY                                        
 
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                      END IF                                                    
 
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                  ELSE IF (WGTTYP(1:1).EQ.'I') THEN                             
 
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                      W      = 1./WEIGHT(I1,I2,I3)**2                           
 
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                  END IF                                                        
 
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C                                                                               
 
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C  Compute fitting values                                                       
 
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C                                                                               
 
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                  Y1     = 0.D0                                                 
 
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                  BEGFCT = 1                                                    
 
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                  DO 20 IFUN = 1,NRFUN                                          
 
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                      CALL FTFUNC(FCTCOD(IFUN),NRIND,X,ACTPAR(IFUN),            
 
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     +                            PRM(BEGFCT),YOUT,PARDER(BEGFCT))              
 
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                      Y1     = Y1 + YOUT                                        
 
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                      BEGFCT = BEGFCT + ACTPAR(IFUN)                            
 
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   20             CONTINUE                                                      
 
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                  FCT    = FCT + W* (Y1-Y)**2                                   
 
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                  DO 30 K = 1,NRPRM                                             
 
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                      IP     = FIXPAR(K)                                        
 
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                      IF (IP.LE.0) THEN                                         
 
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                          GRD(K) = GRD(K) + 2.D0*W*PARDER(K)* (Y1-Y)            
 
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                      ELSE                                                      
 
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                          GRD(IP) = GRD(IP) + 2.D0*W*PARDER(K)* (Y1-Y)/         
 
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     +                              PRPFAC(K)                                   
 
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                      END IF                                                    
 
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   30             CONTINUE                                                      
 
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                  X(1)   = X(1) + STEP(1)                                       
 
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   40         CONTINUE                                                          
 
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              X(2)   = X(2) + STEP(2)                                           
 
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   50     CONTINUE                                                              
 
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          X(3)   = X(3) + STEP(3)                                               
 
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   60 CONTINUE                                                                  
 
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      RETURN                                                                    
 
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      END