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From: ImageAnalyst &lt;imageanalyst@mailinator.com&gt;
Newsgroups: comp.soft-sys.matlab
Subject: Re: Help please, how to write simple iterations and for loops
Date: Tue, 3 Nov 2009 10:15:04 -0800 (PST)
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Dave:
What exactly is PI+1 or PI-1?  Is that the P value at the index after
and before the current index (if so, you need to have the complete PI
for all elements already calculated so that you can use them in the
next pass)?  In other words, if you're calculating P(k) and it depends
on P(k+1) but you haven't calculated P(k+1) already, then you're out
of luck.

Or is it literally the PI value plus or minus 1 (which is impossible
because you haven't calculated PI yet)?
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