matlab get symbolic numerator and denominator

To obtain the symbolic numerator and denominator in MATLAB, you can use the numden function. This function takes a symbolic expression as input and returns its numerator and denominator as separate symbolic expressions. Here's an example:

syms x
expr = (x^2 + 3*x + 2)/(x + 1); % Example symbolic expression
[num, den] = numden(expr); % Get numerator and denominator

disp(num); % Display numerator
disp(den); % Display denominator

In this example, the numden function is used to obtain the numerator and denominator of the symbolic expression (x^2 + 3*x + 2)/(x + 1). The numerator num and denominator den are then displayed using the disp function.

This code will output the following:

x^2 + 3*x + 2
x + 1

The numerator num is x^2 + 3*x + 2, and the denominator den is x + 1.