Name
varn — symbolic variable of a polynomial
Calling Sequence
[symb]=varn(p)
[pm]=varn(x,var)
Parameters
- p
polynomial (or matrix polynomial)
- symb
character string
- x
polynomial or polynomial matrix
- var
symbolic variable (character string)
- pm
matrix or polynomial matrix
Description
symb=varn(p) returns in symb the symbolic variable of the polynomial p
(i.e. varn(poly(0,'x')) is 'x').
varn(x,'s') returns a polynomial matrix with same coefficients
as x but with 's' as symbolic variable (change of variable name).
Examples
//
s=poly(0,'s');p=[s^2+1,s];
varn(p)
varn(p,'x')