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Mathematica -another For loop problem

  • To: mathgroup at
  • Subject: [mg65734] Mathematica -another For loop problem
  • From: "1.156" <rob at>
  • Date: Sun, 16 Apr 2006 03:49:13 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

[This post has been delayed due to email problems - moderator]

I've got to manipulate some signed 12bit integer numbers from a file and 
apparently Mathematica only handles 8 and 16 bit signed numbers 
(probably for a very good reason). So I bring them in as 16 bits (and 
they're stored that way with a leading zero nibble) and then I have to 
do the following to make sense of them.  I really don't know why this 
code works but it does.

So to my question: once again I had to resort to a For loop to pull this 
off and I know this is a no-no.  But I'm so clueless about Mathematica 
that I've never come up with a more sophisticated method after a year or 
so of thinking about it. Can someone help (as they usually can)?

For[i = 1, i < Length[y], i++, If[y[[i]] > 2048, y[[i]] =
     y[[i]] - 2048, y[[i]] = y[[i]] + 2048]];

Thanks, Rob

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