symmetric_limits: Expand a range to make it symmetric
Description
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.
Usage
symmetric_limits(x)
Value
A numeric vector of length two with the new limits, which are always
such that the absolute value of upper and lower limits is the same.
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.