F06AAF (DROTG) generates a real Givens plane rotation.
F06AAF (DROTG) generates a real Givens plane rotation with parameters
c and
s, such that, given real
a and
b:
The routine computes
c,
s and
d as follows:
The routine also computes the value
z defined as
This enables
c and
s to be reconstructed from the single value
z as
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.
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Not applicable.
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