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gpiv_vorstra(1) [debian man page]

GPIV_VORSTRA(1) 					      General Commands Manual						   GPIV_VORSTRA(1)

NAME

       gpiv_vorstra - Calculates the differential quantities vorticity, shear strain and normal strain from PIV data.

SYNOPSIS

       gpiv_vorstra [-d N] [-h | --help] [-n | -o | -s] [--no_g ] [-p | --print] [-g | --g] [-v | --version] [filename] < stdin > stdout

DESCRIPTION

       gpiv_vorstra  calculates the differential quantities like vorticity, shear strain and normal strain from PIV data. You can choose from sev-
       eral differential schemes: central differentiation, least squares, Richardson extrapolation and circulation method. Circulation method only
       allows one to calculate vorticity, but no strain. The output can be generated as ASCII data containing four columns or as GNUPlot Data for-
       mat 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

       -n     Calculate  normal  strain  of the PIV data. As an alternative the program may be called by its nickname gpiv_nstrain. In combination
	      with filename the output will be written to filename.nstr.

       -o     Calculate vorticity of the PIV data. As an alternative the program may be called by its nickname	gpiv_vorty.  In  combination  with
	      filename the output will be written to filename.vor.

       -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.

       -s     Calculate shear strain of the PIV data. As an alternative the program may be called by its nickname  sstrain.  In  combination  with
	      filename the output will be written to filename.sstr.

       -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.vor with -o, filename.nstr with -n or file-
	      name.sstr with -s.  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_VORSTRA(1)

Check Out this Related Man Page

GPIV_T-AVG(1)						      General Commands Manual						     GPIV_T-AVG(1)

NAME

       gpiv_t-avg - Calculates time-averaged mean and variances of PIV data.

SYNOPSIS

       gpiv_t-avg  [-dn  |  --dir_name	dir  basename]	[-df  |  --first_dir  N] [-dl | --last_dir N] [-fb | --file_basename file basename] [-ff |
       --first_file N] [-fl | --last_file N] [-fx | --file_prefix] [-h | --help] [-n | --none] [-p | --print] [-relrms]  [-uv  |  --print]  [-v  |
       --version]

DESCRIPTION

       gpiv_t-avg calculates mean and variances from a series of piv data resulting into time-averaged values. If no parameters are defined at the
       command line, standard parameters will be used that are defined in the script. This program does not use the parameter resources from libg-
       piv.

Options
       -dn | --dir_name dir base-name
	      The  dir	base-name represents the directory name without its last number. It is supposed that the last number in the directory name
	      is a counter.

       -df | --first_dir
	      Defines the counter  N of the first directory number at which the analyses starts.

       -dl | --last_dir
	      Last directory number N at which the analyses ends.

       -fb | --file_base_name file base-name
	      The filename has to be given without its .piv extension. The file base-name represents the file name without its last number, before
	      the extension. If not -fx key is used, it is supposed that the last number in the file name is a counter. The output will be written
	      to dir base-name/file base-name.ta_mean.piv and dirname/filename.ta_sdev.piv at which mean values and variances are written  respec-
	      tively or to dirname/filename.ta_U.piv and to dirname/filename.ta_V.piv if -uv is used.

       -ff | --first_file
	      Defines the counter  Nof first file number at which the analyses starts.

       -fl | --last_file
	      Last file number N at which the analyses ends.

       -fx | --file_prefix
	      Prefix numbering to file base name.

       -h | --help
	      On-line help.

       -n | --none
	      Suppresses real execution.

       -p | --print
	      Prints parameters, command line options and input and output filenames to stdout.

       -relrms
	      Prints relative rms, related to the absolute mean value.

       -uv    Writes U and v displacements/velocities to separate outputs.

       -v | --version
	      Prints version information to standard output, then exits successfully.

       SEE ALSO
	      gpivtools

AUTHOR

       Gerber Van der Graaf

								  19 Januari 2005						     GPIV_T-AVG(1)
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