Calculating volume under a 3-D set of non uniform data points

Hi!

I have a large set of data points (x,y,z) that I used to create a 3-D surface map. The result was a somewhat flat plane with a convex center (it looks like if someone dug a hole in the ground).

I need to find the volume within the data points between the flat plane and and the convexed center (so negative volume, or the amount of volume loss).

Does anyone have any suggestions as to how to go about doing this?

Answer 1

[Walter Roberson]

This File Exchange contribution might help -- but check the comments on the contribution: I do not know the status of the issues indicated there.

You might have to segment your data into portions, removing the flat plane and summing the volumes of what remains (the flat portion implies that the overall figure is not convex)

Answer 2

[Sean de Wolski]

http://www.mathworks.com/matlabcentral/fileexchange/24593-volume-enclosed-by-a-triangulated-surface

Perhaps.