coeffs of symbolic equation

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ahmad ahmadi
ahmad ahmadi 2021-5-12
评论： ahmad ahmadi 2021-5-12
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;

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Paul
Paul 2021-5-12
编辑：Paul 2021-5-12
Ran in:
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 = 
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Paul
Paul 2021-5-12
Ran in:
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

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