Repeat loops

Intermediate R for Finance

Lore Dirick

Manager of Data Science Curriculum at Flatiron School

Loops

ch3_vid1_slides.003.png

¹ tdfitness, My Daily Routine

Loops

ch3_vid1_slides.004.png

¹ tdfitness, My Daily Routine ² John Rochelle, Water Cycle

Repeat loop

i <- 0

repeat {
  i <- i + 1
  print(i)
}

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.
.
.
# Infinite loop!

Repeat loop

i <- 0

repeat {
  i <- i + 1
  print(i)

  if(i == 3) {
    break
  }
}

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Repeatedly check a stock price

stock_price <- 52.1
repeat {
  stock_price <- stock_price * runif(1, .99, 1.01)
  print(stock_price)
  if(stock_price > 52.5) {
    print("Stock price is above 52.5! Sell!")
    break
  }
}

52.0491
52.42412
51.92386
51.82161
52.19669
52.43577
52.71329
"Stock price is above 52.5! Sell!"

Let's practice!

Intermediate R for Finance