Parameters

FPARAMETERS parameters
            /
            GUESS(gg) 
            MIN(mn)   
            MAX(mx)   
            DIFF(pref)
            SUM (pref)
            PROD(pref)
            QUOT(pref)
            FIX       
            VARY      
            RELATIVE  
            NOLIM     
            LIST      
            EON       
            EOFF      

Purpose

  Defines values and attributes of fit parameters.

Example

  FPAR 3 / sum(4) g(10000) r

  fixes the sum of the fit parameters number 3 and 4 to 10000.
  Fit parameter number 4 is the reference parameter (not changed)

  FPAR 3 / sum(4) g(10000)

  The value of fit parameter number 3 is set to 10000.
  The sum of the fit parameters number 3 and 4 is fixed at the value
  10000 + the value of parameter number 4.

  FPOL 2
  FPAR */g(10,20,30)
  FPAR 3/r g(80) diff(1)

  Defines a polynomial of second order.
  The values of the parameters are initially set to p1=10, p2=20, p3=30.
  Then p3 is relatively fixed so that p3-p1=80, i.e. its start value is p3=90.
 

List of parameter numbers. * means all parameters.
   

List of guess values for specified fit parameters.
If only a single value is given it is assigned to all specified fit parameters.

List of lower limits for fit parameter values.
Must not exceed the current values of fit parameters.
Further conventions see command parameter GUESS().

List of upper limits for fit parameter values.
Must not be exceeded by the current values of fit parameters.
Further conventions see command parameter GUESS().

The specified fit parameter values are relatively fixed.
The differences, sums, products or quotients, respectively,
of the specified fit parameters and the reference parameter pref
are held constant during iterations.

The specified fit parameter values are held constant during iterations

The specified fit parameter values are allowed to vary during iterations

For relatively fixed fit parameter values (DIFF() SUM()PROD()QUOT())
the guess values (GUESS()) are assumed
to be difference, sum or quotient with respect to the corresponding
reference fit parameter.

Limits of the specified fit parameters are set to infinity

List the specified fit parameters.

Enable asymmetric error analysis for the specified fit parameters.
This might be time consuming

Disable asymmetric error analysis for the specified fit parameters.