how to check the length of stl model edge in matlab

I drew a cubic whose lengeh is 1mm formating stl.After importing the stl model into matlab,I got p(the coordinate of all the vertexes or points),tnorm(all the face normals) and t(all the triangles contains the indexes of the composed points of each triangle),but I want to find all the edges that are longer than 0.5mm,and interpolate a midpoint.How can I make it? Thank you.

Answer 1

[Sleh Eddine Brika]

I hope you already find a solution for this but anyway I am going to answer that if anyone needs it.

 %Import the STL file
   model = createpde(1);
   b=importGeometry(model,'C:\...\filename.stl'); % Put your file name here
   g=model.Geometry;
%Calculate the edges length
   [Ex, Ey, Ez] = g.allDisplayEdges(); %list of edges
   c=(sqrt((Ex(1,:)-Ex(2,:)).^2+(Ey(1,:)-Ey(2,:)).^2+(Ez(1,:)-Ez(2,:)).^2));%the matrix with the length of each edge

[LIN Hongbin]

thanks a lot it works well