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MathGroup Archive 2002

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Reading Data into Mathematica

  • To: mathgroup at smc.vnet.net
  • Subject: [mg33839] Reading Data into Mathematica
  • From: Oleg Burd <OBurd at MaplePartners.com>
  • Date: Fri, 19 Apr 2002 02:28:49 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hello, 
I'm trying to resolve following problem:

Form file of 700 MB, consisting of lines, every line begins with time stamp
(hhmmss) and contains information regarding different objects, the
information regarding each object must be extracted and anlalysed.

After spending several days on playing with Read, ReadList and searching the
MathGroup archive, I find out:
ReadList is not proper solution, because of RAM restrictions.MemoryConserve
doesn't help mauch as well.
There are routines in MathSource for working with data, they are designed
however only for binary data(!).
There is know proper memory management in Mathemtaica, which would make
possible to allocate memory for ReadList.
Construction 
While (Read[Stream,Record]=!= EndOfFile) is too slow, for reading such data.

Can anybody help me to solve it? Ot may be you know some of proper memory
utilities.
Or my approach is completely wrong and Matheamtica is neither designed for
such tasks nor can handle them?
Thx,
Oleg.
  


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