Selection by comparison in R another way

R Programming Language / Vector in R Language

360

Program:

# Poker and roulette winnings from Monday to Friday:
poker_vector <- c(140, -50, 20, -120, 240)
roulette_vector <- c(-24, -50, 100, -350, 10)
days_vector <- c("Monday", "Tuesday", "Wednesday", "Thursday", "Friday")
names(poker_vector) <- days_vector
names(roulette_vector) <- days_vector

# Which days did you make money on poker?
selection_vector <- poker_vector > 0

# Select from poker_vector these days
poker_winning_days <- poker_vector[selection_vector]

# See result
poker_winning_days

Output:

> # See result
> poker_winning_days
   Monday Wednesday    Friday 
      140        20       240

Explanation:

# Select from poker_vector these days
poker_winning_days <- poker_vector[selection_vector]

# See result
poker_winning_days

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