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poly Scilab Group Scilab Function poly
NAME
poly - polynomial definition
CALLING SEQUENCE
[p]=poly(a,"x", ["flag"])
PARAMETERS
a : matrix or real number
x : symbolic variable
"flag" : string ("roots", "coeff"), default value is "roots".
DESCRIPTION
If a is a matrix, p is the characteristic polynomial i.e.
determinant(x*eye()-a), x being the symbolic variable.
If v is a vector, poly(v,"x",["roots"]) is the polynomial with roots
the entries of v and "x" as formal variable. (In this case, roots and
poly are inverse functions).
poly(v,"x","coeff") creates the polynomial with symbol "x" and with
coefficients the entries of v. (Here poly and coeff are inverse
functions).
s=poly(0,"s") is the seed for defining polynomials with symbol "s".
EXAMPLE
s=poly(0,"s");p=1+s+2*s^2;
A=rand(2,2);poly(A,"x")
SEE ALSO
coeff, matrices, rational
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