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 libgpiv.

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
              respectively  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)