Extract numerator and denominator
[ converts N,D] =
numden(A)A to
a rational form where the numerator and denominator are relatively
prime polynomials with integer coefficients. The function returns
the numerator and denominator of the rational form of an expression.
If A is a symbolic or a numeric matrix,
then N is the symbolic matrix of numerators,
and D is the symbolic matrix of denominators.
Both N and D are matrices
of the same size as A.
Find the numerator and denominator of a symbolic number.
[n, d] = numden(sym(4/5))
n = 4 d = 5
Find the numerator and denominator of the symbolic expression.
syms x y [n,d] = numden(x/y + y/x)
n = x^2 + y^2 d = x*y
Find the numerator and denominator of each element of a symbolic matrix.
syms a b [n,d] = numden([a/b, 1/b; 1/a, 1/(a*b)])
n = [ a, 1] [ 1, 1] d = [ b, b] [ a, a*b]