Nonuniform mesh semivector: Illustrates usage of the semivector modesolver to calculate the quasi-TE and quasi-TM modes of a ridge waveguide. Use the stretchmesh function to expand the size of the computation window at the edges without increasing the number of gridpoints.-Nonuniform mesh semivector: Illustrates usage of the semivector modesolver to calculate the quasi-TE and quasi-TM modes of a ridge waveguide. Use the stretchmesh function to expand the size of the computation window at the edges without increasing the number of gridpoints.