1 .TH GPIV_NSTRAIN 1 "8 November 2006"
3 gpiv_nstrain \- Calculates normal strain from PIV data.
8 [\fB-h\fR | \fB--help\fR]
9 [\fB-p\fR | \fB--print\fR]
10 [\fB-g\fR | \fB--g\fR]
12 [\fB-v\fR | \fB--version\fR]
14 < \fIstdin\fR > \fIstdout\fR
20 \fBgpiv_nstrain\fP calculates the normal strain from PIV data. You can
21 choose from several differential schemes: central differentiation,
22 least squares, and Richardson extrapolation. The output can be
23 generated as ASCII data containing four columns or as GNUPlot Data
24 format that allows to view/print the data as contour plots.
26 The configuration parameters (containing the \fBPOST\fR key) may be
27 overruled by the command line options, as explained below.
33 Differential type to be used: central difference
34 (\fIN\fR=0), least squares (\fIN\fR=1), Richardson interpolation
35 (\fIN\fR=2), circulation method (\fIN\fR=3)
38 \fB-h\fR | \fB--help\fP
42 \fB-p\fR | \fB--print\fP
43 Print parameters, command line options and eventually used input and
44 output filenames to stdout. The output is identic of \fIfilename\fB.par\fR,
45 in case \fIfilename\fP is used.
49 Show contour plot of the output with gnuplot.
53 Suppresses to show contour plot of the output with gnuplot.
56 \fB-v\fR | \fB--version\fP
57 Print version information on standard output, then exit successfully.
61 Input PIV data file. Overrides stdin and stdout. The output will be
62 written to \fIfilename\fB.nstr\fR. Parameters are stored in
63 \fIfilename\fB.par\fR and may be used for future use by including them