gpiv_nstrain - Calculates normal strain from PIV data.
gpiv_nstrain [-d N] [-h | --help] [-p | --print] [-g | --g] [--no_g ]
[-v | --version] [filename] < stdin > stdout
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 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.
-d N Differential type to be used: central difference (N=0), least
squares (N=1), Richardson interpolation (N=2), circulation
-h | --help
-p | --print
Print parameters, command line options and eventually used input
and output filenames to stdout. The output is identic of
filename.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
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
Gerber Van der Graaf
8 November 2006