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Subject: Re: Area under line/within lines
Date: Wed, 20 Apr 2011 18:16:05 +0000 (UTC)
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"Roger Stafford" wrote in message <ion71g$mi7$1@fred.mathworks.com>...
> ........
>   Note that if the points' order is clockwise, these will give the negative of the area.
> ........
- - - - - - - - - -
  Added remark:  If the polygon crosses over itself in a figure "eight", the clockwise area will be subtracted from the counterclockwise area.  You can imagine what the generalization of that would be for many crossings.

Roger Stafford