Excluding specific elements from matrix index

Hello. I have a 4x4 matrix where I want to convert the last three elements on row two to 2. How do I exclude specific elements from a matrix row without refering to a element, but rather the element position? Perhaps there are better solutions but im not sure what to make of it.

A(2,find(A(2,:)))=2 turns all elements of row 2 into 2. I cant find a way to exclude row 1 without excluding all elements that have the same value?

Grateful for any help I can get.

Answer 1

[Mischa Kim]

Jonah, how about

 A(2,end-2:end) = 2

or, simply,

 A(2,2:4) = 2