I have data that map one real (float) and several nominal arguments to one real value:
y = f(r, n1, n2, n3, n4)
If I check dependency of
r (r is my real-valued variable), I see that
y depends linearly on
r with a lot of noise on top of this dependency.
Now I want to check if there is any dependency of
y on nominal variables: n1, n2, n3, n4. I also would like to know what nominal variable has the largest influence on
y. So, my question is: What methods can I used to do that?