From: Conditional permutation importance revisited
Option
Formula
Option A
\(Y_{i} = X_{1i} + X_{1i}^{2} + \varepsilon _{i}\)
Option B
\(Y_{i} = X_{1i} + X_{1i}^{2} + X_{3i} + \varepsilon _{i}\)
Option C
\(Y_{i} = X_{1i} + X_{1i}^{2} + X_{5i} + \varepsilon _{i}\)