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MathGroup Archive 2002

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Re: BinaryImport

  • To: mathgroup at smc.vnet.net
  • Subject: [mg37060] Re: BinaryImport
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Mon, 7 Oct 2002 05:26:20 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <anorhl$pou$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

BinaryImport[] is complet unusable for this task.
I tryed the same with similar data sets and run
out of kernel memory (with 1.5 GByte RAM) & 3GB swap). 
The WRI support respondet, that "BinaryImport[]" is
not for reading *large* binary data. 

You can have the beta version of MathGL3d 3.1 that
has an extra C-Function for that task.
Since it also include excelent volume rendering functions
and a native format for reading and writing compressed
volume data files you should use MathGL3d 3.1b.

Contact me direct if you wish to "beta test" the new
version.

Regards
  Jens

Blimbaum Jerry DLPC wrote:
> 
> I use BinaryImport to read a file as follows:
> 
> BinaryImport["file",{Byte..}]
> 
> then I use Partition to rebuild the data of dimensions  252 x 253 x 255....
> 
> This works but it takes about half an hour to read the file....it's a 16
> MByte file.....any way to improve this?
> 
> thanks....jerry blimbaum


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