Find SI prefix for unit
find_prefix(x, f = min, minexp = -Inf, maxexp = Inf, mu = TRUE)character with the SI prefix
a numeric
function that produces the number from x that is used to
determine the prefix, e.g. min or
median.
minimum (decimal) exponent to consider, e.g. -3 to suppress prefixes smaller than milli (m).
maximum (decimal) exponent to consider, e.g. 3 to suppress prefixes larger than kilo (k).
if TRUE, should a proper mu be used for micro, otherwise use
u as ASCII-compatible replacement
Claudia Beleites