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Manipulating current read position in a binary file

• To: mathgroup at smc.vnet.net
• Subject: [mg80266] Manipulating current read position in a binary file
• From: Aranthon <a.dwarf at gmail.com>
• Date: Thu, 16 Aug 2007 04:44:33 -0400 (EDT)

Hello all,

I'm trying to read in a large data file (several million data points);
at the beginning of the file is the number of data points, but at the
end of the file is the number of bins into which the data will be
grouped.  Is there a way to skip to the end of the file to read in the
number of bins before returning to the beginning of the file to read
in the actual data?  I can do the analysis In another CAS, since there are
functions fseek and ftell, so that once I read in the number of data
points I can seek to the end, get the grouping count, then seek back
to the beginning, but I'd like to be able to do it in Mathematica.

Any suggestions?

Thanks,

Greg Anderson
Doctoral Candidate
University of Maryland

• Follow-Ups:
  • RE: Manipulating current read position in a binary file
    • From: "David Annetts" <davidannetts@aapt.net.au>
  • Re: Manipulating current read position in a binary file
    • From: Kristjan Kannike <kkannike@physic.ut.ee>