Applies a Givens rotation of angle theta to rows i and j of Q (a left
action on those two rows), used by the geodesic hit-and-run / slice samplers.
Usage
givens_left(Q, i, j, theta)
Arguments
- Q
An r by p matrix with orthonormal columns.
- i, j
Row indices to rotate.
- theta
Rotation angle.
Value
The rotated matrix.
