Character used between every 3 digits to separate thousands.
The default (NULL) retrieves the setting from the
number options.
accuracy
A number to round to. Use (e.g.) 0.01 to show 2 decimal
places of precision. If NULL, the default, uses a heuristic that should
ensure breaks have the minimum number of digits needed to show the
difference between adjacent values.
Applied to rescaled data.
min_length
A numeric. Minimum number of characters
of the string with the formatted value.