C @(#)ftdodo.for	17.1.1.1 (ES0-DMD) 01/25/02 17:10:45
C===========================================================================
C Copyright (C) 1995 European Southern Observatory (ESO)
C
C This program is free software; you can redistribute it and/or 
C modify it under the terms of the GNU General Public License as 
C published by the Free Software Foundation; either version 2 of 
C the License, or (at your option) any later version.
C
C This program is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
C GNU General Public License for more details.
C
C You should have received a copy of the GNU General Public 
C License along with this program; if not, write to the Free 
C Software Foundation, Inc., 675 Massachusetss Ave, Cambridge, 
C MA 02139, USA.
C
C Corresponding concerning ESO-MIDAS should be addressed as follows:
C	Internet e-mail: midas@eso.org
C	Postal address: European Southern Observatory
C			Data Management Division 
C			Karl-Schwarzschild-Strasse 2
C			D 85748 Garching bei Muenchen 
C			GERMANY
C===========================================================================
C
      SUBROUTINE FTDODO(NITER,RELAX,CHISQ,V1,V2,NACT,ACTCH,ISTAT)               
C++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++                   
C.COPYRIGHT: Copyright (c) 1987 European Southern Observatory,                  
C                                         all rights reserved                   
C                                                                               
C.VERSION: 1.0  ESO-FORTRAN Conversion, AA  17:25 - 13 JAN 1988                 
C                                                                               
C.LANGUAGE: F77+ESOext                                                          
C                                                                               
C.AUTHOR: J.D.PONZ                                                              
C                                                                               
C.IDENTIFICATION                                                                
C                                                                               
C  FITLIB.FOR   VERSION 1.0  27 MAR 1984                                        
C                                                                               
C.PURPOSE                                                                       
C                                                                               
C  INTERFACE ROUTINES FOR THE FITTING STRUCTURES                                
C                                                                               
C ITERATE ON THE FITTING PROCESS                                                
C THE ITERATION IS FINISHED IF                                                  
C - NITER IS REACHED OR                                                         
C - CHISQ IS REACHED                                                            
C - CONVERGENCE IS ACHIEVED                                                     
C.ALGORITHM                                                                     
C                                                                               
C  USE MIDAS I/O INTERFACES TO FRAMES AND TABLES                                
C                                                                               
C.KEYWORDS                                                                      
C                                                                               
C  NON LINEAR FITTING                                                           
C                                                                               
C                                                                               
C----------------------------------------------------------------               
C                                                                               
C                                                                               
C      IMPLICIT NONE                                                            
C INPUT PARAMETERS                                                              
C NITER INTG NO. OF ITERATIONS TO BE DONE                                       
C RELAX REAL RELAXATION FACTOR                                                  
C CHISQ REAL CHI SQUARE                                                         
C V1,V2 REAL OPTIONAL FITTING INTERVAL (IF V1.NE.V2)                            
C                                                                               
C OUTPUT PARAMETERS                                                             
C NACT INTG ACTUAL NUMBER OF ITERATIONS                                         
C ACTCH REAL ACTUAL CHI SQ.                                                     
C ISTAT INTG STATUS RETURN                                                      
C                                                                               
      LOGICAL NAG                                                               
      INTEGER MADRID(1)
      INTEGER KUN,KNUL,NITER,ISTAT,STATUS,NACT,K
      REAL RELAX,CHISQ,V1,V2,ACTCH
      CHARACTER*8 KEYMM                                                         
      CHARACTER*12 FZMETHOD                                                   
       INCLUDE 'MID_INCLUDE:FITI.INC/NOLIST'                                     
       INCLUDE 'MID_INCLUDE:FITC.INC/NOLIST'                                     
      COMMON/VMR/MADRID
      DATA KEYMM/'FITCHAR'/                                                     
C                                                                               
C BRANCH ON IMAGE OR TABULAR DATA                                               
C                                                                               
      CALL STKRDC(KEYMM,1,FZIMET,6,K,FZMETHOD,KUN,KNUL,STATUS)                           
C      CALL SXKGET(KEYMM,'C',FZIMET,6,K,FZMETHOD,STATUS)                           
      CALL FORUPC(FZMETHOD,FZMETHOD)
      NAG    = (FZMETHOD(1:5).EQ.'CGNND') .OR.                                
     +         (FZMETHOD(1:2).EQ.'QN') .OR. (FZMETHOD(1:3).EQ.'MGN')        
      IF ((.NOT.NAG) .AND. (FZMETHOD(1:2).NE.'NR')) 
     .    CALL STETER(3,'FIT : Error in method name')                                         
      IF (NAG) THEN                                                             
          CALL FITNAG(FZMETHOD,ISTAT)                                        
      ELSE                                                                      
          IF (FZTYPE.EQ.'TBL ') THEN                                          
              CALL FTTNTR(NITER,RELAX,CHISQ,V1,V2,NACT,ACTCH,ISTAT)             
          ELSE                                                                  
              CALL FTINTR(MADRID(FZPTRI),MADRID(FZPTRM),FZNPIX(1),        
     +                    FZNPIX(2),FZNPIX(3),NITER,RELAX,CHISQ,V1,         
     +                    V2,NACT,ACTCH,ISTAT)                                  
          END IF                                                                
      END IF                                                                    
      RETURN                                                                    
      END