How can I assign values to an equation?

I have equation of the form

 y(x)= gg.*M(x) / (k(x)-gg.L(x));

The thing is gg is number and varies with 'x' in such a way that

 gg= 1, for x from 0 to 10
 gg= 1.2, x=11
 gg=1.6, x= 12
 gg= 1.7, x= 13

How can I assign this values in matlab? am new to matlab

Thank you for your help

[Azzi Abdelmalek]

Are you working with a discrete function?

[Ede gerlderlands]

It's continuous with x runs from 0 to 13.

Answer 1

[Azzi Abdelmalek]

From your question I guess you are using discrete function,

g=[ones(1,11) 1.2 1.6  1.12]

Because Matlab don't allow negative index, gg(0) is g(1), gg(1) is g(2) and so on