NAME

       gpiv_nstrain - Calculates normal strain from PIV data.

SYNOPSIS

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

DESCRIPTION

       gpiv_nstrain  calculates  the  normal  strain  from  PIV  data.  You can choose from several differential
       schemes: central differentiation,  least  squares,  and  Richardson  extrapolation.  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.nstr.
              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_NSTRAIN(1)