Re: Import Limitations
- To: mathgroup at smc.vnet.net
- Subject: [mg61091] Re: Import Limitations
- From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
- Date: Mon, 10 Oct 2005 02:39:52 -0400 (EDT)
- Organization: Uni Leipzig
- References: <firstname.lastname@example.org>
- Sender: owner-wri-mathgroup at wolfram.com
and OpenRead the file and than Read the data
row by row will not work ?
Or you may try to buy a 64 bit machine,
Mathematica 5.2 will support this.
"Benedetto Bongiorno" <bbongiorno at attglobal.net>
schrieb im Newsbeitrag
news:diaau9$ict$1 at smc.vnet.net...
| To Mathgroup,
| I frequently need to Import large data, usually
a *.csv file, containing
| 3 million rows by 50 columns.
| The file contains both strings and numerics. I
sometimes do not know the
| make up of which columns are strings and which
| In small files I import all the data as strings.
| Because of the 2 gig memory limitation of
Windows XP running V5.2, I
| cannot use the Import.
| The reason Import does not work for me is it
will only import the
| complete file, thus the system runs
| out of memory. I need to import the data in
| I have tried ReadList, but it only lets you
select the first group size.
| Suggestions of Skip and SetStreamPosition causes
me errors, due to the
| fact that I have a problem
| composing the functions.
| Thank you,
| Ben Bongiorno
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