How to use if statements with arrays?

I am trying to use an if statement with an array,

x = 1:1:4
if x > 2
  y = x + 1
else
  y = x - 1
end

I want the resulting array for y to be [ 0, 1, 4, 5], how would i execute specific functions for only certain numbers in an array? i want y = x + 1 to only affect the numbers in the x array that are greater then 2 and y = x - 1 to only affect the numbers in the x array that are less then 2.

Answer 1

[Brian B]

y = (x>2).*(x+1) + (x<=2).*(x-1)

[Dylan Zeigler]

you are a lifesaver

[Brian B]

Just watch out if you want to generalize this. The following will not work (i.e., give you a finite numerical result), for example:

 a = [0 1 2];
 b = [4 3 2];
 y = (a~=0).*(b./a); % ... + (a==0)*0 not needed