File: rref.man

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.TH rref  1 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
rref - computes  matrix row echelon form by lu transformations
.SH CALLING SEQUENCE
.nf
R=rref(A)
.fi
.SH PARAMETERS
.TP
A
:  m x n matrix with scalar entries
.TP
R
:  m x n matrix,row echelon form of a
.SH DESCRIPTION
\fVrref\fR computes the row echelon form of the given matrix by left lu
decomposition. If ones need the transformation used just call
\fVX=rref([A,eye(m,m)])\fR the row echelon form \fVR\fR is \fVX(:,1:n)\fR and
the left transformation \fVL\fR is given by \fVX(:,n+1:n+m)\fR such as \fVL*A=R\fR
.SH EXAMPLE
.nf
A=[1 2;3 4;5 6];
X=rref([A,eye(3,3)]);
R=X(:,1:2)
L=X(:,3:5);L*A
.fi
.SH SEE ALSO
lu, qr