It's a common misconception that for loops in R are slow. They're actually fast (around 20 million iterations per second on my computer). What can be slow is mo

It's a common misconception that for loops in R are slow. They're actually fast (around 20 million iterations per second on my computer). What can be slow is modifying data structures in particular ways using a loop. See http://rpubs.com/wch/46581 http://rpubs.com/wch/46581