matrixM

Sparse M matrix.


Syntax
   M = matrixM(x)

Description
   M = matrixM(x) This function makes use of paper:
   Avoinding Similarity Transformations in the tau method - 2015 -(José
   Matos et al.), and consists in to build the M matrx in some
   orthogonal polynomial basis. Here, we also implemented the orthogonal
   shift, and M matrix is sparse.

Input
   x = independent tau variable (itau object).

Output
   M = matrix such that Ma = xPa (sparse matrix).

See also
  matrixN and matrixO.