NAME

       gpiv_s-avg - Spatial statistics of PIV data.

SYNOPSIS

       gpiv_s-avg [-h | --help] [-p | --print] [-s] [-no_s] [-v | --version] [filename] < stdin > stdout

DESCRIPTION

       gpiv_s-avg  reports  the  spatial global mean velocities and variances in x and y-direction of a PIV data
       stream. Only input data of which the peak number is not equal to -1 are taken into account.

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

Options

       -h | --help
              On-line help.

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

       -s     Subtracts the mean x-and y-particle displacements from the input data.

       -no_s  Suppresses subtracting the mean values from the input data.

       -v | --version
              Prints version information on standard output, then exits successfully.

       [-z dx0 dy0]
              zero offset of displacement or velocity estimators.

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

       SEE ALSO
              gpivtools

NOTES

AUTHOR

       Gerber Van der Graaf

BUGS

       The program has been tested for PIV data. So far, no bugs have been found.

                                                 8 November 2006                                   GPIV_S-AVG(1)