is there a function to compute the area of a polygon in 3D ?

I want to compute the area of polygons which vertices are in an other plane than plane X,Y. So they are defined by coordinates X, Y and Z. Consequently I can't use the function S=polyarea(X,Y). Is there a function S=fun(X,y,Z) to do this ?

Additionaly, is there a function to calculate the value of a volume delimited by polygons ?

Answer 1

[Bharath Swaminathan]

It's a bit late in the day. Please check this out: area3D - File Exchange - MATLAB Central (mathworks.com).