How I can solve the problem of Loop?

N = 15

X = randi([1,3],[N,1]);

X will be 15 by 1 matrix with random values 1, 2, 3.

Y1 = 10 (For X = 1)

Y2 = 11 (For X = 2)

Y3 = 12 (For X = 3)

I want to find the value of Y for every value of X such that Y = Y1 +26 (for X = 1), Y = Y2+26 (For X = 2) and Y = Y3 +26 (For X =3)

For every value of X i want to calculate the value of Y that depends upon Y1, Y2 and Y3

Moreover, resultant Y will be a single matrix, how I can use the loop?

[Walter Roberson]

Y=X+9+26