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MathGroup Archive 2005

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Re: Mathematica: how to set the format of binary numbers in plotting?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg58621] Re: Mathematica: how to set the format of binary numbers in plotting?
  • From: Peter Pein <petsie at dordos.net>
  • Date: Sun, 10 Jul 2005 16:51:40 -0400 (EDT)
  • References: <daqp0r$6dp$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

1.156 schrieb:
> I use BinaryReadList[filename, "Integer16"] to bring in an array of 
> numbers. I then do a bunch of operations on these numbers and then try 
> to plot them. They should be signed integers and interpreted in 2's 
> complement but apparently they have been converted to unsigned binary as 
> far as I can tell -- and the plots are horrible.
> 
> Can someone tell me how you can specify the interpretation (signed or 
> unsigned) of numbers before they are used in ListPlot[] ? Thanks.
> 
Try to play around with the option ByteOrdering:
BinaryReadList[filename, "Integer16", ByteOrdering->-1], if the file has
been written on a x86 machine (or any other Processor using little
endian) and ByteOrdering->1 for the others.

Hope this helps,
Peter

-- 
Peter Pein
Berlin
http://people.freenet.de/Peter_Berlin/


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