!include once #1035331 // EJML Include (Matrix library)

static Complex[] eigenvaluesOfSymmetricMatrix(double[][] matrixData) {

  var matrix = new DMatrixRMaj(matrixData);

  var evd = new SymmetricQRAlgorithmDecomposition_DDRM(false); // false = don't need vectors

  if (!evd.decompose(matrix))

    null;

  int n = evd.getNumberOfEigenvalues();

  Complex[] eigenvalues = new[n];

  for i to n: {

    var v = evd.getEigenvalue(i);

    eigenvalues[i] = Complex(v.real, v.imaginary);

  }

  ret eigenvalues;

}