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.TH varn 1 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
varn - symbolic variable of a polynomial
.SH CALLING SEQUENCE
.nf
[symb]=varn(p)
[pm]=varn(x,var)
.fi
.SH PARAMETERS
.TP 10
p
: polynomial (or matrix polynomial)
.TP 10
symb
: character string
.TP 10
x
: polynomial or polynomial matrix
.TP 10
var
: symbolic variable (character string)
.TP 10
pm
: matrix or polynomial matrix
.SH DESCRIPTION
\fVsymb=varn(p)\fR returns in \fVsymb\fR the symbolic variable of the polynomial \fVp\fR
(i.e. \fVvarn(poly(0,'x'))\fR is \fV'x'\fR).
.LP
\fVvarn(x,'s')\fR returns a polynomial matrix with same coefficients
as \fVx\fR but with \fV's'\fR as symbolic variable (change of variable name).
.SH EXAMPLE
.nf
s=poly(0,'s');p=[s^2+1,s];
.fi
\fVvarn(p)\fR is the string \fV's'\fR and \fVvarn(p,'x')\fR is the polynomial matrix
\fV[x^2+1,x]\fR
.SH SEE ALSO
horner, poly
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