Functional Programming with R

Functional programming is a programming paradigm that treats computation as the evaluation of mathematical functions. In R, you can use functions like lapply, sapply, and map from the purrr package.

Step 1: Install and Load purrr

rCopy codeinstall.packages("purrr")
library(purrr)

Step 2: Create a Sample List

rCopy code# Create a list of numeric vectors
num_list <- list(a = 1:5, b = 6:10, c = 11:15)

Step 3: Use lapply and sapply

rCopy code# Apply a function to each element using lapply
squared_list <- lapply(num_list, function(x) x^2)
print(squared_list)

# Use sapply to simplify the output to a matrix
squared_matrix <- sapply(num_list, function(x) x^2)
print(squared_matrix)

Step 4: Use map from purrr

rCopy code# Use map to apply a function and return a list
squared_map <- map(num_list, ~ .x^2)
print(squared_map)