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.

NOTES

AUTHOR