How to get the coefficients of an equation

Dear all,

Is it possible to extract the coefficients of an equantion defined as below:

syms x1 x2
eq = 2*x1 + x2 <= 0

eq = 

By using coeffs and sym2poly did not work when it has the relational operator "<=".

c = coeffs(eq)

c = 

1

c = sym2poly(eq)

Error using sym/sym2poly
Not a polynomial.

[Dyuman Joshi]

What is the expected output?

[1 2] or [2 1]? or something else?

[Geovane Gomes]

[2 1]

Answer 1

[Dyuman Joshi]

How about -

syms x1 x2
eq = 2*x1 + x2 <= 0

eq = 

out = flip(coeffs(lhs(eq)))

out = 

[Geovane Gomes]

Good solution!

This way I can also have the term in the right side

syms x1 x2
eq = 2*x1 + x2 <= 5

eq = 

out = flip(coeffs(rhs(eq)))

out = 

5

Thanks!

Answer 2

[Sulaymon Eshkabilov]

Maybe it is appropriate to work in a reverse order, e.g.:

syms x1 x2
Coeff = [2;1];
eq = [x1, x2]*Coeff<=0

eq =