Basic For Loops

1. The code below prints the numbers 1 through 5 one line at a time. Modify it to print each of these numbers multiplied by 3.

numbers <- c(1, 2, 3, 4, 5)
for (number in numbers){
  print(number)
}

2. Write a for loop that loops over the following vector and prints out the mass in kilograms (mass_kg = 2.2 * mass_lb)

mass_lbs <- c(2.2, 3.5, 9.6, 1.2)

3. Complete the code below so that it prints out the name of each bird one line at a time.

birds = c('robin', 'woodpecker', 'blue jay', 'sparrow')
for (i in 1:length(_________)){
  print(birds[__])
}

4. Complete the code below so that it stores one area for each radius.

radius <- c(1.3, 2.1, 3.5)
areas <- vector(_____ = "numeric", length = ______)
for (__ in 1:length(________)){
  areas[__] <- pi * radius[i] ^ 2
}
areas

5. Complete the code below to calculate an area for each pair of lengths and widths, store the areas in a vector, and after they are all calculated print them out:

lengths = c(1.1, 2.2, 1.6)
widths = c(3.5, 2.4, 2.8)
areas <- vector(length = __________)
for (i in _____) {
  areas[__] <- lengths[__] * widths[__]
}
areas

Data Science Research in Biology - Fall 2022

Basic For Loops

Data Science Research in Biology -
Fall 2022