Man Scilab
givens
Scilab Function
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
2
x
2
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
,
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