MATLAB: I wanna obtain numerical values from a tf(num,den). How to do it

Question

num=[1 1 0]; den=[1 2 3 4];

G=tf(num,den);

s1=2+3i;

G(s1)=???

Answer 1

Use the evalfr (link) function:

num=[1 1 0]; den=[1 2 3 4];
G=tf(num,den);
s1=2+3i;
Gs1 = evalfr(G,s1)          % G(s1)=???

producing:

Gs1 =
          0.197938144329897 -     0.145360824742268i