GPIV_SSTRAIN(1) General Commands Manual GPIV_SSTRAIN(1)NAME
gpiv_sstrain - Calculates the shear strain from PIV data.
SYNOPSIS
gpiv_sstrain [-d N] [-h | --help] [--no_g ] [-p | --print] [-g | --g] [-v | --version] [filename] < stdin > stdout
DESCRIPTION
gpiv_sstrain calculates the shear 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 file-
name.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.sstr. 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_SSTRAIN(1)
Check Out this Related Man Page
GPIV_S-AVG(1) General Commands Manual GPIV_S-AVG(1)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)
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