Please help with looping

Sorry, correction for input value, a(2)

I created a function as follows and have 2 input values labelled as a(1) and a(2)

 function my_function = func_two(a)

 x = (1+sin(5*a(1))-(1/sqrt(8*(sin(a(1)))))) 
 y = (1+sin(5*a(2))+(1/sqrt(8*(sin(a(2)))))) 

 func_two   = x + y
 func_three = x + y + x
 func_four  = x + y + x + y

and so on. E.g For func_four, I tried with x + y + x + y, but it didn't work, so I put the full equation:

 e.g  func_four = (1+sin(5*a(1))-(1/sqrt(8*(sin(a(1))))))... 
                 +(1+sin(5*a(2))+(1/sqrt(8*(sin(a(2))))))... 
                 +(1+sin(5*a(1))-(1/sqrt(8*(sin(a(1))))))... 
                 +(1+sin(5*a(2))+(1/sqrt(8*(sin(a(2))))));

How to create a loop to simplify this function, if I want to have func_ten or func_twenty? TQ.

Answer 1

[Azzi Abdelmalek]

 function out=nth(x,y,n)
 if fix(n/2)==n/2
  out=n*(x+y)
 else
  out=(n-1)*(x+y)+x
end

then

out=nth(12,14,5)