numden - Numerator and denominator
Syntax
[N,D] = numden(A)
Description
[N,D] = numden(A) converts
each element of A to a rational form where the
numerator and denominator are relatively prime polynomials with integer
coefficients. A is a symbolic or a numeric matrix. N is
the symbolic matrix of numerators, and D is the
symbolic matrix of denominators.
Examples
Find the numerator and denominator of the symbolic number:
[n, d] = numden(sym(4/5))
The result is:
n =
4
d =
5
Find the numerator and denominator of the symbolic expression:
syms x y;
[n,d] = numden(x/y + y/x)
The result is:
n =
x^2 + y^2
d =
x*y
The statements
syms a b
A = [a, 1/b]
[n,d] = numden(A)
return
A =
[a, 1/b]
n =
[a, 1]
d =
[1, b]
 | null | | openmn |  |
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