/** \brief An example of using the hierarchical factorization of a dense matrix. from .mat file.
* An dense matrix is loaded from "@FAUST_DATA_MAT_DIR@
* \param MatrixFilename : a .mat (MATLAB file) where the matrix to be factorized is stored (or its transposed (cf. parameter transposeMatrix))
* \param configFilename : a .mat (MATLAB file) configuration file which contains the parameter of the hierarchical algorithm (default launch with a predefined configuration called hierFact)
* \param expectedLambda (optionnal) : compared the expected scalar of the factorisation with the computed one in the precision defined with epsilon
*\param epsilon (optionnal) : precision for the test of equality (default value 0.0001)
*\param transposeMatrix (optionnal) : -value 'N' (default value), the matrix stored in MatrixFilename is factorized