File: sqroot.man

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.TH sqroot 2 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an 
.SH NAME
sqroot - W*W' hermitian factorization
.SH CALLING SEQUENCE
.nf
sqroot(X)
.fi
.SH PARAMETERS
.TP
X 
: symmetric non negative definite real or complex matrix
.SH DESCRIPTION
.Vb W=sqroot(X) 
returns W such that  \fVX=W*W'\fR (uses SVD).
.SH EXAMPLE
.nf
X=rand(5,2)*rand(2,5);X=X*X';
W=sqroot(X)
norm(W*W'-X,1)
//
X=rand(5,2)+%i*rand(5,2);X=X*X';
W=sqroot(X)
norm(W*W'-X,1)
.fi
.SH SEE ALSO 
chol, svd