CODEWITHSUNDEEP
r
celianou
celianou

Reputation: 207

Get the number of lines of code in a R script

I would like to know if there is a way to count the number of lines in a R script.

Ignoring lines of comment.

I didn't find a solution on the Internet. But maybe I missed something.

Upvotes: 1

Views: 1502

Answers (3)

Andrey Kolyadin
Andrey Kolyadin

Reputation: 1321

Example sctipt tester.R with 8 lines, one commented:

x <- 3
x+1

x+2

#x+4

x*x

Function to count lines without comments:

foo <- function(path) {
  rln <- read_lines(path)
  rln <- rln[-grep(x = trimws(rln) , pattern = '^#')]
  rln <- rln[ trimws(rln) != '']
  return(length(rln))
}

Test run:

> foo('tester.R')
[1] 7

Upvotes: 2

Bechir Barkallah
Bechir Barkallah

Reputation: 341

You could try this :

library(magrittr)
library(stringr)
library(readr)

number_of_lines_of_code <- function(file_path){
 file <- readr::read_file(file_path)
 file_lines <- file %>% stringr::str_split("\n") 
 first_character_of_lines <- file_lines %>%
  lapply(function(line)stringr::str_replace_all(line," ",""))  %>% 
  lapply(function(line)stringr::str_sub(line,1,1)) %>%
  unlist
 sum(first_character_of_lines != "#" & first_character_of_lines != "\r")
}

number_of_lines_of_code("your/file/path.R")

Upvotes: 2

Roland
Roland

Reputation: 132969

That doesn't seem like very useful information, but you can do this:

script <- "#assign
a <- 1

b <- 2
"

nrow(read.table(text = script, sep = "°"))
[1] 2

I use ° as the separator, because it's an unlikely character in most R scripts. Adjust that as needed.

Of course, this could be done much more efficiently outside of R.

Upvotes: -1

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