File: rref.cat

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rref(1)                        Scilab Function                        rref(1)
NAME
  rref - computes  matrix row echelon form by lu transformations

CALLING SEQUENCE
  R=rref(A)

PARAMETERS

  A    :  m x n matrix with scalar entries

  R    :  m x n matrix,row echelon form of a

DESCRIPTION
  rref computes the row echelon form of the given matrix by left lu decompo-
  sition. If ones need the transformation used just call X=rref([A,eye(m,m)])
  the row echelon form R is X(:,1:n) and the left transformation L is given
  by X(:,n+1:n+m) such as L*A=R

EXAMPLE
  A=[1 2;3 4;5 6];
  X=rref([A,eye(3,3)]);
  R=X(:,1:2)
  L=X(:,3:5);L*A

SEE ALSO
  lu, qr