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       fityk - non-linear curve fitting and data analysis


       fityk [OPTION]... [FILE]...
       cfityk [OPTION]... [FILE]...


       This  manpage  documents  briefly  the  fityk  and  cfityk programs for
       nonlinear fitting of analytical functions (especially  peak-shaped)  to
       data  (usually  experimental  data). In other words, for nonlinear peak
       separation and analysis.
       It was developed for analyzing diffraction patterns, but  can  be  also
       used  in  other  fields,  since  concepts  and  operations specific for
       crystallography are separated from the rest of the program.
       Fityk offers various nonlinear fitting methods, subtracting background,
       calibrating data, easy placement of peaks and changing peak parameters,
       automation of common tasks  with  scripts,  and  much  more.  The  main
       advantage  of the program is a flexibility - parameters of peaks can be
       arbitrarily binded with each  other,  eg.  width  of  peak  can  be  an
       independent  variable, can be the same as width of other peak or can be
       given by complicated - common for all peaks - formula.
       The program comes in two versions: fityk , the GUI version and cfityk ,
       the command line version.
       A    user   manual   for   fityk   and   cfityk   can   be   found   in


       -h, --help
              Print the usage and exit.

       -V, --version
              Print the version number and exit.

       Use --help to see the full list of options.


       This manual page was written by Carlo Segre <> and updated
       by Marcin Wojdyr.

                                January 8, 2006