NAME

       gpiv_vorty  -  Calculates  the differential quantities vorticity, shear strain and normal strain from PIV
       data.

SYNOPSIS

       gpiv_vorty [-d N] [-h | --help] [-p | --print] [-g | --g] [--no_g ] [-v | --version] [filename] < stdin >
       stdout

DESCRIPTION

       gpiv_vorty calculates the differential quantities like vorticity, shear strain and normal strain from PIV
       data. You  can  choose  from  several  differential  schemes:  central  differentiation,  least  squares,
       Richardson  extrapolation  and  circulation  method.  Circulation  method  only  allows  one to calculate
       vorticity, but no strain. The output can be generated as ASCII data containing four columns or as GNUPlot
       Data format that allows one to view/print the data as contour plots.

       The configuration parameters (containing the POST key) may be overruled by the command line  options,  as
       explained below.

Options

       -d N   Differential  type  to  be  used:  central  difference  (N=0),  least  squares  (N=1),  Richardson
              interpolation (N=2), circulation method (N=3)

       -h | --help
              On-line help

       -p | --print
              Print parameters, command line options and eventually used input and output filenames  to  stdout.
              The output is identic of filename.par, in case filename is used.

       -g     Show contour plot of the output with gnuplot.

       --no_g Suppresses to show contour plot of the output with gnuplot.

       -v | --version
              Print version information on standard output, then exit successfully.

       filename
              Input  PIV  data  file.  Overrides  stdin  and stdout. The output will be written to filename.vor.
              Parameters are stored in filename.par and may  be  used  for  future  use  by  including  them  in
              ./gpivrc.

SEE ALSO

       gpivtools

AUTHOR

       Gerber Van der Graaf

                                                 8 November 2006                                   GPIV_VORTY(1)