SURF2STL Write STL file from surface data.
SURF2STL('filename',X,Y,Z) writes a stereolithography (STL) file
for a surface with geometry defined by three matrix arguments, X, Y
and Z. X, Y and Z must be two-dimensional arrays with the same size.

SURF2STL('filename',x,y,Z), uses two vector arguments replacing
the first two matrix arguments, which must have length(x) = n and
length(y) = m where [m,n] = size(Z). Note that x corresponds to
the columns of Z and y corresponds to the rows.

SURF2STL('filename',dx,dy,Z) uses scalar values of dx and dy to
specify the x and y spacing between grid points.

SURF2STL(...,'mode') may be used to specify the output format.

'binary' - writes in STL binary format (default)
'ascii' - writes in STL ASCII format

Example:

surf2stl('test.stl',1,1,peaks);

See also SURF.

Author: Bill McDonald, 02-20-04