Label chopped intervals with arbitrary formatting

Usage

lbl_format(fmt, fmt1 = "%.3g", raw = FALSE)

Arguments

fmt

A format. Can be a string, passed into base::sprintf() or format() methods; or a one-argument formatting function.

fmt1

Format for breaks consisting of a single value.

raw

Logical. Always use raw breaks in labels, rather than e.g. quantiles or standard deviations?

Value

A vector of labels for chop, or a function that creates labels.

Details

These labels let you format breaks arbitrarily, using either a string (passed to sprintf()) or a function.

If fmt is a function, it must accept two arguments, representing the left and right endpoints of each interval.

If breaks are non-numeric, you can only use "%s" in a string fmt. breaks will be converted to character in this case.

lbl_format() is in the "questioning" stage. As an alternative, consider using lbl_dash() or lbl_intervals() with the fmt argument.

See also

Other labelling functions: lbl_dash(), lbl_discrete(), lbl_intervals(), lbl_manual(), lbl_seq()

Examples

tab(1:10, c(1,3, 3, 7),
      label = lbl_format("%.3g to %.3g"))
#>  1 to 3       3  3 to 7 7 to 10 
#>       2       1       3       4 
tab(1:10, c(1,3, 3, 7),
      label = lbl_format("%.3g to %.3g", "Exactly %.3g"))
#>    1 to 3 Exactly 3    3 to 7   7 to 10 
#>         2         1         3         4 

percent2 <- function (x, y) {
  sprintf("%.2f%% - %.2f%%", x*100, y*100)
}
tab(runif(100), c(0.25, 0.5, .75),
      labels = lbl_format(percent2))
#>  0.64% - 25.00% 25.00% - 50.00% 50.00% - 75.00% 75.00% - 98.41% 
#>              21              20              33              26