File: varn.cat

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scilab 2.6-4
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varn             Scilab Group             Scilab Function              varn
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).
  
EXAMPLE
 s=poly(0,'s');p=[s^2+1,s];
   varn(p) is the string 's' and varn(p,'x') is the polynomial matrix
  [x^2+1,x]
  
SEE ALSO
   horner, poly