Functions in R allow you to encapsulate reusable code, making your scripts more organized, readable, and efficient. By writing your own functions, you can perform repetitive tasks without rewriting code.<\/p>\n\n\n\n
A function in R is defined using the Explanation:<\/strong><\/p>\n\n\n\n If you don\u2019t use You can set default values for arguments:<\/p>\n\n\n\n A function can contain multiple statements:<\/p>\n\n\n\n Output:<\/strong> A list containing mean, max, and min values.<\/p>\n\n\n\n Functions can call other functions:<\/p>\n\n\n\n Writing functions in R is a powerful way to automate tasks, organize your code, and perform complex calculations efficiently. By mastering function creation, you can streamline your data analysis workflow and make your scripts modular, reusable, and professional.<\/p>\n\n\nfunction()<\/code> keyword:<\/p>\n\n\n\nmy_function <- function(arg1, arg2) {
# Code to execute
result <- arg1 + arg2
return(result)
}<\/pre>\n\n\n\n\n
my_function<\/code> is the name of the function.<\/li>\n\n\n\narg1<\/code>, arg2<\/code> are input arguments.<\/li>\n\n\n\nreturn()<\/code> specifies the output value of the function.<\/li>\n<\/ul>\n\n\n\nCalling a Function<\/strong><\/h3>\n\n\n\n
my_function(5, 3) # Returns 8<\/pre>\n\n\n\n
2. Functions Without Return Statement<\/strong><\/h1>\n\n\n\n
return()<\/code>, R automatically returns the last evaluated expression:<\/p>\n\n\n\nadd_numbers <- function(a, b) {
a + b
}add_numbers(4, 7) # Returns 11<\/pre>\n\n\n\n3. Functions with Default Arguments<\/strong><\/h1>\n\n\n\n
greet <- function(name = \"User\") {
paste(\"Hello,\", name)
}greet(\"Alice\") # Returns \"Hello, Alice\"
greet() # Returns \"Hello, User\"<\/pre>\n\n\n\n4. Functions with Multiple Operations<\/strong><\/h1>\n\n\n\n
calculate_stats <- function(x) {
mean_value <- mean(x)
max_value <- max(x)
min_value <- min(x)
return(list(mean = mean_value, max = max_value, min = min_value))
}calculate_stats(c(5, 10, 15, 20))<\/pre>\n\n\n\n5. Using Functions Inside Other Functions<\/strong><\/h1>\n\n\n\n
square <- function(x) { x^2 }
sum_of_squares <- function(a, b) {
square(a) + square(b)
}sum_of_squares(3, 4) # Returns 25<\/pre>\n\n\n\n6. Advantages of Writing Functions<\/strong><\/h1>\n\n\n\n
\n
Conclusion<\/strong><\/h1>\n\n\n\n