Reference

String Functions

String handling and regex helpers.

1. endsWith()

   Check if a string ends with a specified suffix in R.

   endsWith(x, suffix)
2. format()

   Format R objects for pretty printing, controlling decimal places and alignment.

   format(x, trim = FALSE, digits = NULL, nsmall = 0, scientific = NA, ...)
3. formatC()

   Format numbers using C-style formatting in R.

   formatC(x, digits = 1, format = 'd', width = NULL, flag = '', mode = NULL, big.mark = '')
4. grep()

   Search for matches to a pattern within character strings, returning indices.

   grep(pattern, x, value = FALSE, ignore.case = FALSE, perl = FALSE, fixed = FALSE, useBytes = FALSE, invert = FALSE)
5. grepl()

   Search for matches to a pattern within character strings, returning a logical vector.

   grepl(pattern, x, ignore.case = FALSE, perl = FALSE, fixed = FALSE, useBytes = FALSE)
6. gsub()

   Replace all occurrences of a pattern in a character string using regex or fixed matching.

   gsub(pattern, replacement, x, ignore.case = FALSE, perl = FALSE, fixed = FALSE)
7. nchar()

   Get the length of a string in characters, bytes, or width units for display.

   nchar(x, type = "chars", keepNA = FALSE)
8. startsWith()

   Check if a string starts with a specified prefix in R.

   startsWith(x, prefix)
9. strsplit()

   Split a character string into substrings based on a delimiter or pattern.

   strsplit(x, split, fixed = FALSE, perl = FALSE, useBytes = FALSE)
10. sub()

    Replace the first occurrence of a pattern in a character string using regex or fixed matching.

    sub(pattern, replacement, x, ignore.case = FALSE, perl = FALSE, fixed = FALSE)
11. substring()

    Extract or replace substrings in a character vector using start and stop positions with flexible indexing.

    substring(text, first, last = .Machine$integer.max)
12. tolower()

    Convert character strings to lowercase in R.

    tolower(x)
13. toupper()

    Convert character strings to uppercase in R.

    toupper(x)
14. trimws()

    Remove leading and/or trailing whitespace from character strings. Essential for cleaning user input and text data before processing.

    trimws(x, which = c("both", "left", "right"), whitespace = "[[:space:]]")