### Hello World: R + Fortran + OpenMP

Why? I want to fill up a big matrix and I care about speed and to a lesser degree memory efficiency. In practice the matrix will have 4000 rows and K columns where K is the number of observations for which I want to run my predictive model. For this exercise I will keep K to just 500 because my R approach eats a ton of memory. For this simple exercise, I will \(A_{ik} = 1 / (1 + exp(i^2 + i^3 + k^2 + k^3))\) in practice the operation that I need to do is much more complicated which will make the difference is run time even bigger.