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Computes eigenvalues and eigenvectors of real symmetric matrices.
eigen.sym(x)
a vector containing the eigenvalues of x, sorted in decreasing order.
x
a matrix whose columns contain the eigenvectors of x, corresponding to eigenvalues.
A real symmetric matrix.
This is to use the LAPACK routine 'DSYEVR' to perform spectral decomposition.
eigen for more information.
eigen