unifyVertex(faces,v​ertices)

This function unifies the duplicated vertices of a triangular meshed object.

Input:
faces should be an M-by-3 matrix indicating the facet triangulation.
vertices should be an N-by-3 matrix indicating the vertex coordinates.
Other:
I read the info of faces and vertices of my STL files using the 'stlread' function (which can be downloaded from:
http://www.mathworks.com/matlabcentral/fileexchange/22409-stl-file-reader).