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  • Committer: Bazaar Package Importer
  • Author(s): Torsten Werner
  • Date: 2002-03-21 16:57:43 UTC
  • Revision ID: james.westby@ubuntu.com-20020321165743-e9mv12c1tb1plztg
Tags: upstream-2.6
Import upstream version 2.6

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man/linear/givens.cat
 
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givens            Scilab Group            Scilab Function            givens
 
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NAME
 
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   givens - Givens transformation
 
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CALLING SEQUENCE
 
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 U=givens(xy)
 
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 U=givens(x,y)
 
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 [U,c]=givens(xy)
 
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 [U,c]=givens(x,y)
 
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PARAMETERS
 
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 x,y   : two real or complex numbers
 
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 xy    :  real or complex size 2 column vector
 
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 U     : 2x2 unitary matrix
 
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 c     :  real or complex size 2 column vector
 
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DESCRIPTION
 
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   U = givens(x, y) or U = givens(xy) with xy = [x;y] returns a 2x2 unitary
 
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  matrix U such that:
 
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   U*xy=[r;0]=c.
 
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   Note that givens(x,y) and givens([x;y]) are equivalent.
 
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EXAMPLE
 
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 A=[3,4;5,6];
 
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 U=givens(A(:,1));
 
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 U*A
 
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SEE ALSO
 
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   qr   
 
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