How to extract a coefficient from a specific symbolic variable?

Hello all!

I am modeling a suspension system and I have 6 very long equations of motion that I need to convert to state space. To create the matrices for the state space, I need the coefficient of each of my state variables. Is there a good way to extract these variables?

I looked at coeffs but since I have an equation and not a polynomial I couldn't get it to work.

By using collect I am able to easily view the coefficient for one variable at a time but it is very tedious and doesn't output the coefficient - it just makes it easy for me to see.

I don't have a lot of experience with Matlab so hopefully this is an easy fix. Thank you!

Answer 1

[Walter Roberson]

Sometimes you can isolate() the variable in the equation, after which coeffs() the lhs() of the equation.

Otherwise, lhs(eqn)-rhs(eqn) and coeffs() that to get the coefficient for the variable.