polyderiv

% -*- texinfo -*-
% @deftypefn {Function File} {} polyderiv (@var{c})
% @deftypefnx {Function File} {[@var{q}] =} polyderiv (@var{b}, @var{a})
% @deftypefnx {Function File} {[@var{q}, @var{r}] =} polyderiv (@var{b}, @var{a})
% Return the coefficients of the derivative of the polynomial whose
% coefficients are given by vector @var{c}.  If a pair of polynomials
% is given @var{b} and @var{a}, the derivative of the product is
% returned in @var{q}, or the quotient numerator in @var{q} and the
% quotient denominator in @var{r}.
% @seealso{poly, polyinteg, polyreduce, roots, conv, deconv, residue,
% filter, polygcd, polyval, polyvalm}
% @end deftypefn