Skip to Content.
Sympa Menu

charm - Re: [charm] [cosmology-ppl] Tipsy file in ASCII

charm AT lists.cs.illinois.edu

Subject: Charm++ parallel programming system

List archive

Re: [charm] [cosmology-ppl] Tipsy file in ASCII


Chronological Thread 
  • From: Tom Quinn <trq AT astro.washington.edu>
  • To: Shad Kirmani <sxk5292 AT cse.psu.edu>
  • Cc: charm AT cs.uiuc.edu, cosmology-ppl AT cs.uiuc.edu
  • Subject: Re: [charm] [cosmology-ppl] Tipsy file in ASCII
  • Date: Wed, 8 Feb 2012 09:34:38 -0800 (PST)
  • List-archive: <http://lists.cs.uiuc.edu/pipermail/charm>
  • List-id: CHARM parallel programming system <charm.cs.uiuc.edu>

You likely have an "endian" problem. The cube300.tbin has a different byte order than your architecture. The TipsyReader class figures this out, but bin2ascii does not. Try using "totipnat" in the tipsy_tools distribution to convert to your native binary format. E.g.

totipnat < cube300.tbin | bin2ascii > cube300.out

Tom Quinn Astronomy, University of Washington
Internet:
trq AT astro.washington.edu
Phone: 206-685-9009

On Wed, 8 Feb 2012, Shad Kirmani wrote:

Hello Dr. Quinn,
I used the following code to read cube300.tbin file:

Tipsy::TipsyReader r(filename);
Tipsy::header tipsyHeader = r.getHeader();
int nTotalParticles = tipsyHeader.nbodies;
int nTotalSPH = tipsyHeader.nsph;
int nTotalDark = tipsyHeader.ndark;
int nTotalStar = tipsyHeader.nstar;

The total number of particles when read through the above code is 110592.

When I convert the same file into ASCII, using the bin2ascii utility, the
first
line mentions the total number of particles as 11534592.

I converted cube300.tbin into ASCII using the following command:

./bin2ascii < cube300.tbin > cube300.out 

Thanks,
Shad

On Wed, Feb 8, 2012 at 10:35 AM, Tom Quinn
<trq AT astro.washington.edu>
wrote:
Documentation for the ASCII format used by ascii2bin is at
http://www-hpcc.astro.washington.edu/tipsy/man/readascii.html

Tom Quinn       Astronomy, University of Washington
Internet:      
trq AT astro.washington.edu
Phone:          206-685-9009


On Wed, 8 Feb 2012, Shad Kirmani wrote:

Hello,
I have been struggling to understand the Tipsy file format. Can
anybody
please provide a Tipsy file in ASCII format. 

I can then use ascii2bin and bin2ascii utilities, mentioned at
http://librarian.phys.washington.edu/astro/index.php/Research:Tipsy,
to
generate the binary files and vice versa.

Thanks,
Shad






Archive powered by MHonArc 2.6.16.

Top of Page