Help with If else statement

I have a series of x numbers and I want to create a script where "if x<5 then y = 50-0.5*x else y = 50+0.5*x and y = 0 if 50-0.5*x<0". How can I write this in octave/matlab?

Answer 1

[KSSV]

y = zeros(size(x)) ; 
y(x<5) = 50-0.5*x(x<5) ; 
y(x>=5) = 50+0.5*x(x>=5) ; 

[Konstantina Vaitsi]

Oh my god, it was that easy? Thank you so much!