QTLRel: eigen_sym – R documentation

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eigen_sym

Spectral decomposition of a matrix

Computes eigenvalues and eigenvectors of real symmetric matrices.

eigen.sym(x)

`x`	A real symmetric matrix.

This is to use the LAPACK routine 'DSYEVR' to perform spectral decomposition.

`values`	a vector containing the eigenvalues of `x`, sorted in decreasing order.
`vectors`	a matrix whose columns contain the eigenvectors of `x`, corresponding to eigenvalues.

Warning: symmetry is not checked by the program!