Separates the matrices of the coefficients of harmonics
This function is used in mfpca to cut the harmonic coefficient matrix. In fact mfpca call a c++ mfpca which return (among others) the matrix of the coefficients of the harmonics in the basis expantion. But in the multivariate case the coefficient matrix for all dimension are store in the same matrix, so we use this function to store each dimension in the specific matrix.
the coefficients matrix, see the description for more details
vector containing the number of basis for each dimension
a list of length dimension of the data which contain the harmonic coefficients matrix for each dimension