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From: "John D'Errico" <woodchips@rochester.rr.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Distance between point and circular segment
Date: Tue, 22 Apr 2008 14:17:01 +0000 (UTC)
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"alessandro mura" <fake@address.com> wrote in message 
<fukr2u$lil$1@aioe.org>...
> if you have a line in the explicit form
> y=m*x+q,
> 
> then if Py > m*Px+q
> you are above the line, otherwise you are below...

too bad when the line is vertical...