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)