F06AAF (DROTG) generates a real Givens plane rotation.
F06AAF (DROTG) generates a real Givens plane rotation with parameters
, such that, given real
The routine computes
The routine also computes the value
to be reconstructed from the single value
To apply the plane rotation to a pair of real vectors, call F06EPF (DROT)
; to apply it to a pair of complex vectors, call F06KPF