Exercise

Advanced selection

Just like you did for poker, you also want to know those days where you realized a positive return for roulette.

Instructions

100 XP

Create the variable selection_vector, this time to see if you made profit with roulette for different days.
Assign the amounts that you made on the days that you ended positively for roulette to the variable roulette_winning_days. This vector thus contains the positive winnings of roulette_vector.