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MathGroup Archive 2002

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Re: Reading Data into Mathematica

  • To: mathgroup at smc.vnet.net
  • Subject: [mg33993] Re: Reading Data into Mathematica
  • From: Jim Grieve <jgrieve at mindspring.com>
  • Date: Thu, 25 Apr 2002 03:00:37 -0400 (EDT)
  • References: <a9ofhq$ddq$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

On Fri, 19 Apr 2002 3:04:26 -0400, Oleg Burd wrote
(in message <a9ofhq$ddq$1 at smc.vnet.net>):

Have you tried using Mac System X with >700MB memory? I understand 
Mathematica will use what it needs in OSX.

JIm


> 
> 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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