add comma every 3 digits in r

To add a comma every three digits in R, you can use the format() function. Here are the steps to accomplish this:

1. Step 1: Define your number or vector of numbers. Let's say you have a number x or a vector x containing multiple numbers.

2. Step 2: Use the format() function to format the number(s) with commas. The format() function takes the following arguments:

3. x: The number or vector of numbers you want to format.
4. big.mark: The character to be used as the thousands separator. In this case, we'll use a comma ,.
5. scientific: A logical value indicating whether to use scientific notation for very large or small numbers. Set this argument to FALSE to disable scientific notation.

Here is an example of how to use the format() function:

R formatted <- format(x, big.mark = ",", scientific = FALSE)

The formatted variable will now contain the numbers with commas added every three digits.

1. Step 3: Print or use the formatted number(s) as desired.

That's it! By following these steps, you can add a comma every three digits to a number or vector of numbers in R.