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From: "Linus Utopia" <linus_utopia@gmail.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: How to detect turning points in curves...
Date: Thu, 12 Jul 2007 23:36:02 -0400
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"us" <us@neurol.unizh.ch> wrote in message 
news:ef5d53f.0@webcrossing.raydaftYaTP...
> Linus Utopia:
> <SNIP direction of turning of subsequent vecs...
>
> a hint:
>
>     help cross;
>
> us

I admit -- I was unable to figure out how will "cross" help me? Are you 
suggesting a hack?