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Re: convert txt to binary file

  • To: mathgroup at smc.vnet.net
  • Subject: [mg108844] Re: convert txt to binary file
  • From: telefunkenvf14 <rgorka at gmail.com>
  • Date: Sat, 3 Apr 2010 06:08:53 -0500 (EST)
  • References: <hp4gg1$7rq$1@smc.vnet.net>

On Apr 2, 5:21 am, jihane <jihane.aj... at mail.mcgill.ca> wrote:
> Hello all,
>
> I have a 4Gb txt file and it is not possible to work with that because it is huge. Does someone knows how to convert an ascii file to a binary file using mathematica? I have a collegue that does it with another system but I can't find out how to do that. I searched a lot without sucess.
>
> Your help would be extremelly appreciated.
>
> Thank you!

I recommend you read the following post (from the excellent 'Lunchtime
Playground: Fun with Mathematica' blog):

http://mathgis.blogspot.com/2009/03/tip-processing-large-data-sets.html

In a nutshell: use ReadList[] rather than Import[], and read in only
what you need. Other than that, you may want to create a database and
have Mathematica access your data via that route instead.

-RG


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