File: polar.man

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.TH polar 1 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
polar - polar form
.SH CALLING SEQUENCE
.nf
[Ro,Theta]=polar(A)
.fi
.SH PARAMETERS
.TP
A
: real or complex square matrix
.TP
Ro, Theta
: real matrices
.SH DESCRIPTION
.Vb [Ro,Theta]=polar(A)
returns the polar form of \fVA\fR i.e.:
.LP
\fVA=Ro*expm(%i*Theta)\fR \fVRo\fR symmetric >=0 and \fVTheta\fR hermitian >=0.
.SH EXAMPLE
.nf
A=rand(5,5);
[Ro,Theta]=polar(A);
norm(A-Ro*expm(%i*Theta),1)
.fi
.SH SEE ALSO
expm, svd
.SH AUTHOR
F. D.