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338 Functions and commands
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Poly to Coef With a variable as second argument, returns the coefficients
of a polynomial with respect to the variable. With a list of
variables as the second argument, returns the internal format
of the polynomial.
symb2poly(Expr,[Var])
or
symb2poly(Expr,ListVar)
Example:
symb2poly(x*3+2.1) gives poly1[3,2.1]
Coef to Poly With one list as argument, returns a polynomial in x with
coefficients (in decreasing order) obtained from the list. With
a variable as second argument, returns a polynomial in the
variable as for one argument but the polynomial is in the
variable specified in the second argument.
poly2symb(Lst,Var)
Example:
poly2symb([1,2,3],x) gives (x+2)*x+3
Roots to Coef Returns the coefficients (in decreasing order) of the univariate
polynomial of roots specified in the argument.
pcoef(Vect)
Example:
pcoeff([1,0,0,0,1]) gives poly1[1,-2,1,0,0,0]
Roots to Poly Returns the rational function that has the roots and poles
specified in the argument.
fcoeff(Lst(root||pole,order))
Example:
fcoeff([1,2,0,1,3,-1]) gives (x-1)^2*x*(x-3)^-1
Random Returns a vector of coefficients of a polynomial of variable Var
(or x), of degree Intgr and where the coefficients are random
integers in the range –99 through 99 with uniform distribution
or in an interval specified by Intrvl.
randpoly([Var],Intgr,[Dist])