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Please note that the recommended version of Scilab is 6.0.1. This page might be outdated.
See the recommended documentation of this function

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

VersionDescription
5.5.1

Extension to rationals

Scilab Enterprises
Copyright (c) 2011-2017 (Scilab Enterprises)
Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
with contributors
Last updated:
Wed Apr 01 10:13:54 CEST 2015