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       gfscompare2D,  gfscompare2D3,  gfscompare3D  -  computes the difference
       between the solutions in FILE1 and FILE2 for variable VAR.


       gfscompare [OPTION]FILE


       This manual page documents briefly the gfscompare command.


       These programs follow the usual GNU  command  line  syntax,  with  long
       options  starting  with  two  dashes  (‘-’).   A  summary of options is
       included below.

       -x, --mixed
              Compute error only in mixed cells.

       -m V, --min=V
              Set minimum of color scale to V (used with -S).

       -M V, --max=V
              Set maximum of color scale to V.

       -a, --abs
              Output the absolute value of the error field.

       -C, --constant
              Apply a constant shift to one of the field, minimizing the error
              between the two fields (useful for pressure).

       -w, --not-weighted
              Do not use area-weighted norm estimation.

       -c, --centered
              Use error estimation for cell-centered variables.

       -p P, --period=P
              Shifts FILE1 by P along the x axis.

       -H, --histogram
              Output  (error,volume)  pairs  for each cell used to compute the
              error norms.

       -o, --output
              Output a GTS representation of the error field.

       -S, --squares
              Output an OOGL representation of the error field.

       -G, --gnuplot
              Output a gnuplot representation of the error field.

       -t, --triangulate
              Use center of mass triangulation.

       -l, --log
              Output the log10 of the absolute value of the error field.

       -f L, --full=L
              Compare only leaf cells descendants of a cell full at level L or
              all full leaf cells if L = -1.

       -r, --refined
              Display error norm on the finest grid.

       -n, --nocheck
              Do not check solid fractions.

       -g C, --gradient=C
              Use the C component of the gradient of VAR.

       -v, --verbose
              Display difference statistics and other info.

       -h, --help
              Display the help and exit.


       gfscompare was written by Stephane Popinet <>.

       This manual page was written by Ruben Molina <>, for
       the Debian project (but may be used by others).

                                 July 10, 2008                   gfscompare(1)