Scilab Function
Last update : 18/05/2014
givens - Givens transformation
Calling Sequence
- U=givens(xy)
- U=givens(x,y)
- [U,c]=givens(xy)
- [U,c]=givens(x,y)
Parameters
-
x,y: two real or complex numbers
-
xy: real or complex size 2 column vector
-
U: 2x2 unitary matrix
-
c: real or complex size 2 column vector
Description
U = givens(x, y) or U = givens(xy) with xy = [x;y]
returns a 2x2 unitary matrix U such that:
U*xy=[r;0]=c.
Note that givens(x,y) and givens([x;y]) are equivalent.
Examples
A=[3,4;5,6];
U=givens(A(:,1));
U*A
See Also
qr,