Generating STL from vertices and thickness?

I want to generate a .stl file of the shape shown in the image. I define the shape using a set of vertices, which define a 2d polygon, and a thickness which makes it 3d. I have tried a few methods but haven't had any success in generating .stl file similar to the one I need.

Answer 1

[KSSV]

If you have vertices and nodal connectivity matrix in hand, use this to write to .stl file. https://in.mathworks.com/matlabcentral/fileexchange/20922-stlwrite-filename--varargin-