Matlab code for fractions

How would I write 1.5/s as a num[ ] den[ ] code in matlab?

Answer 1

[John D'Errico]

Confusing question.

Do you know the value of s?

s = 7
s =
     7
>> 1.5/s
ans =
         0.214285714285714
>> format rat
>> 1.5/s
ans =
       3/14    

Do you not know what is is, so you want to use s in a symbolic form?

syms s
1.5/s
ans =
3/(2*s)

[Johnny McKenney]

I do not know S. I think it is 1. We are meant to write

numx = [ 1 2 3]

denx = [1 2 3]

as an example. I just can't figure out how to do that with 1.5/S or 1/S+2

[John D'Errico]

syms s
F = 1.5/s

[N,D] = numden(F)
N =
3
D =
2*s