coeffs of symbolic equation

Hi gusy

in this code the coeffes of x or y can extracted, but coeffes of x*y or x*y^2 can't obtain with coffes(), do you have any idea?

syms x y

z=x+2*x*y+4.*y+5*x*y^2;

Answer 1

[Paul]

Is this what you're looking for:

syms x y 
z=x+2*x*y+4.*y+5*x*y^2;
[cxy,t]=coeffs(z,[x y])

cxy = 

t = 

[ahmad ahmadi]

No it is not. It give all coefficient. If we have long equation finding a special term is important. I need find an special coefficient not all. Just x*y or x*y^2

[Paul]

syms x y 
z=x+2*x*y+4.*y+5*x*y^2;
[cxy,t]=coeffs(z,[x y])

cxy = 

t = 

cxy(logical(t == x*y^2))

ans = 

5

cxy(logical(t == y^2*x))

ans = 

5

[ahmad ahmadi]

Thanks. It is answer