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C++ API

: G = givens (x, y)

: [c, s] = givens (x, y)

Compute the Givens rotation matrix G.

The Givens matrix is a 2 by 2 orthogonal matrix

g = [c s; -s' c]

such that

g [x; y] = [*; 0]

with x and y scalars.

If two output arguments are requested, return the factors c and s rather than the Givens rotation matrix.

For example:

givens (1, 1)
  ⇒   0.70711   0.70711
      -0.70711   0.70711

See also: planerot.

Package: octave