<< systmat

Polynomials

Signal Processing >>

Scilab Help >> Polynomials > varn

varn

symbolic variable of a polynomial or a rational

Calling Sequence

[symb]=varn(p)
[pm]=varn(p,varname)

Arguments

p: matrix of polynomials or of rationals
symb: character string: name of the variable
varname: character string: the new name of the variable of p, set for pm
pm: matrix of polynomials or of rationals

Description

symb=varn(p) returns in symb the symbolic variable of the polynomial p (i.e. varn(poly(0,'x')) is 'x').

varn(p,'s') returns a polynomial matrix with same coefficients as p 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')

f = %z / (%z-1); f = [f f^2]
varn(f)
varn(f,"x")

See Also

poly — polynomial definition
rlist — Scilab rational fraction function definition
horner — polynomial/rational evaluation

History

Version	Description
5.5.1	Extension to rationals

Report an issue
<< systmat	Polynomials	Signal Processing >>