% @(#)fit_imag.hlq	17.1.1.1 (ESO-IPG) 01/25/02 17:11:28 
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT  (c)  1990 European Southern Observatory
%.IDENT      fit_imag.hlq
%.AUTHOR     JDP,PhD, IPG/ESO
%.KEYWORDS   MIDAS, help files, FIT/IMAGE
%.PURPOSE    On-line help file for the command: FIT/IMAGE
%.VERSION    1.0  20-FEB-1986 : Creation, JDP,PhD
%----------------------------------------------------------------
\se
SECTION./IMAG
\es\co
FIT/IMAGE						20-FEB-1986 JDP,PhD
\oc\su
FIT/IMAGE [nfeval[,prec[,metpar]]] [image[,wgt]] [funct]
	fit image values
\us\pu
Purpose:      
              Fit a user defined function to an image.
              The user function is defined with the command EDIT/FIT.
              See SET/FIT for modifying the method, weighting or printing
              qualifiers.
\up\sy
Syntax:       
              FIT/IMAGE [nfeval[,prec[,metpar]]] [image[,wgt]] [funct]
\ys\pa
              nfeval   = maximum no. of function evaluations to be performed.
                         If nfeval larger than initial values of the
                                   parameters are the user guesses
                            nfeval smaller than initial values are taken
                                   from the previously computed parameter values
\ap\pa
              prec     = precision to be achieved.
\ap\pa
              metpar   = method parameters (different from one method
                         to another, see manual for more details)
\ap\pa
              image    = image to be fitted
\ap\pa
              wgt      = optional weight or deviation of the
                         measurements (see SET/FIT WEIGHT= )
\ap\pa
              funct    = is the user defined function name. By default
                         the last used function is taken.
\ap\no
Note:         none
\on\exs
Examples:
\ex
             FIT/IMAGE 10,0.0005,0.2 IMAGE TEST
             perform 10 iterations of the fit, with a relaxation factor
             0.2 (for a METHOD=NEWTON), to reach a precision  of
             0.0005. Initial values of the parameters are the user guesses
             defined in the function TEST
\xe\ex
             FIT/IMAGE -10,0.5,0.0005 IMAGE
             perform 10 iterations of the fit, using as initial parameters
             the values computed by the previous command.
\xe \sxe