si_prefix: Lookup SI prefix
In jrnold/fivemat: Formatting Numbers for Display

Description Usage Arguments Value Methods (by class) Examples

Lookup an SI prefix by name, by exponent (power of 10), or by value. For exponents or values, the best SI prefix is returned.

si_prefix(x)

## S3 method for class 'character'
si_prefix(x)

## S3 method for class 'integer'
si_prefix(x)

## S3 method for class 'numeric'
si_prefix(x)

x

A vector

A named character vector where values are the SI prefix exponents and names are the SI prefix names, from SI_PREFIXES.

character: x are the names of the prefixes. The prefix mu can be referred to with its unicode value, "\u03BC", or "mu". Empty or missing values map to no strings. Invalid values return NA.
integer: x are the exponents of the SI prefixes, -24, -21, ..., -3, 0, 3, ..., 21, 24.
numeric: x are numeric values.

# lookup by name
si_prefix(c("k", "T", "mu", "\u03BC", "", NA))
# lookup by exponent with integers
si_prefix(c(-2L, -1L, 0L, 5L))
# lookup by value with numeric vectors
si_prefix(c(-1100, 5, 1.5e8))