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GPIV_NSTRAIN(1) General Commands Manual GPIV_NSTRAIN(1)
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 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.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)