Expand scale limits to make them symmetric around zero. Can be
passed as argument to parameter `limits`

of continuous scales from
packages 'ggplot2' or 'scales'. Can be also used to obtain an enclosing
symmetric range for numeric vectors.

## Arguments

- x
numeric The automatic limits when used as argument to a scale's

`limits`

formal parameter. Otherwise a numeric vector, possibly a range, for which to compute a symmetric enclosing range.