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poly(1) Scilab Function poly(1)
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 coeffi-
cients 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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