Find the centroid of a polygon

I have an excel sheet which has the coordinates (x,y) plotted om each row. I am keen to get the centroid of the polygon, ehose edges are defined by these coordinates. The polygon is a 10-sided one. Any help would be much appreciated. Thanks

Answer 1

[Dr. Seis]

Check out: http://www.mathworks.com/matlabcentral/fileexchange/319-polygeom-m

Answer 2

[Walter Roberson]

Ah, I knew I'd seen Roger post a routine for it, and I was right!

http://www.mathworks.com/matlabcentral/newsreader/view_thread/86891