How to loop through arrays of different lengths in R language?

In R language, you can use loop structures to process arrays of different lengths. One common way is through a for loop, where you can iterate through each element in an array. For example, if you have an array x with a length of n, you can use a for loop to iterate through each element.

x <- c(1, 2, 3, 4, 5)
n <- length(x)
for(i in 1:n) {
  print(x[i])
}

2. While loop: You can use a while loop to traverse through each element in an array by incrementing the index. For example, suppose we have an array ‘x’ with a length of ‘n’, we can traverse through each element in the array using the following method:

x <- c(1, 2, 3, 4, 5)
n <- length(x)
i <- 1
while(i <= n) {
  print(x[i])
  i <- i + 1
}

Function ‘apply’: The apply function can be used to apply a function to each element in an array. This function can be applied to the entire array or to specific dimensions. For example, if we have a 2×3 array x, we can iterate through each element in the array using the following method:

x <- matrix(1:6, nrow = 2)
apply(x, 1, function(y) {
  for(i in 1:length(y)) {
    print(y[i])
  }
})

These are several common ways of looping through arrays. Depending on specific needs and data structures, you can choose the suitable looping method to handle arrays of different sizes.