Delila Program: xyda

xyda program

Documentation for the xyda program is below, with links to related programs in the "see also" section.

{   version = 1.00; (* of xyda.p 2007 Nov 02}

(* begin module describe.xyda *)
   xyda: back convert histogram to data file

   xyda(predata: in, xydap: in, postdata: out, output: out)


   predata: A data file containing lines with two values:
        position (an integer or real number)
        number of events at that position (integer)
      Blank lines or lines that begin with '*' are copied to the
      postdata file.
      Negative number values halt the program.
      Zero number values are ignored

   postdata:  For each pair of position and number lines in the predata,
      the position value is written out repeatedly according to
      the number given.

   xydap:  parameters to control the program.  The file must contain the
      following parameters, one per line:

      parameterversion: The version number of the program.  This allows the
         user to be warned if an old parameter file is used.

      Other than the parameterversion, this file is not used yet.

   output: messages to the user


   Convert data in the form of a histogram back to a set of raw
   numbers.  When these numbers are put into genhis, the original
   histogram should be reconstructed.



see also

   xy plotting program:  xyplo.p
   histogram plotting:  genhis.p
   histogram analysis of gaussians:  higa.p


   Thomas Dana Schneider


   There should be parameters that let one pick columns from the
   predata file.

technical notes

(* end module describe.xyda *)
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