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From: "Brian Roberts" <brianroberts1976@yahoo.com>
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Subject: Calculating the volume under a non-gridded non-uniform surface
Date: Wed, 12 Aug 2009 18:43:19 +0000 (UTC)
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I have a dataset "A" (n by 3) of ordered triplets [x,y,z].  I want to calculate the volume between surface defined by "A" and the xy plane.  "A" has only positive values but is not uniformly spaced and not gridded.  "A" cannot be described by a simple function.  Any help?