brk_labels: Create pretty breaks labels
In camille-s/camiller: Lots of convenience functions

Description Usage Arguments Value Examples

This function maps over a vector of labels, such as those returned by base::cut. It works well in formatting ggplot scales, and can optionally pass parameters to an underlying call to base::formatC. Any NA values will be retained.

brk_labels(
  x,
  format = NULL,
  custom = FALSE,
  mult_by = 1,
  round_digits = NULL,
  sep = " to ",
  ...
)

`x`	A character vector.
`format`	A function for formatting text, a string giving desired output format, or `NULL` (the default) for no formatting. Built-in shorthands are `"percent"`, `"dollar"`, and `"dollark"`, the last of which formats numbers like `$12.3k`. Alternatively, provide a character argument to be used by `base::formatC` and set `custom = TRUE`.
`custom`	Logical, whether to use custom formatting, triggering a call to `formatC` with the arguments supplied to `format` and `...`. Defaults `FALSE`.
`mult_by`	A number by which to multiply values in breaks. Defaults to 1, i.e. just the numbers input. Note that multiplication is carried out before rounding and formatting.
`round_digits`	If not `NULL` (the default), the number of digits to round to. Note that this takes place after multiplying by `mult_by`.
`sep`	A string by which to separate values in breaks.
`...`	Any additional arguments to pass on to the function given in `format`, or to `base::formatC` if `custom` is `TRUE`.

A character vector of formatted break labels.

percentage_brks <- c("[0.04,0.15]", "(0.15,0.25]", "(0.25,0.4]")
brk_labels(percentage_brks)
brk_labels(percentage_brks, format = "percent", mult_by = 100)

scientific_brks <- c("[-15500,0]", "(0,20000]", "(20000,25000]")
brk_labels(scientific_brks, format = "e", custom = TRUE, digits = 2)
brk_labels(scientific_brks, format = stringr::str_pad, side = "left", pad = "0", width = 3)