Render a unit string for display

Formats a unit from the controlled vocabulary as a human-readable label using SI negative exponents, for use in table headers, user interfaces, and prose. The canonical unit strings stored in lux_spectrum$unit are deliberately ASCII ("umol/m2/s/nm") so they remain stable identifiers; this function is the display counterpart.

Usage

unit_label(unit)

Arguments

unit

A single unit string from the controlled vocabulary. See lux_spectrum for the valid values.

Value

A length-1 character vector holding the rendered label, e.g. \(\mu mol\,m^{-2}\,s^{-1}\,nm^{-1}\) for "umol/m2/s/nm".

See also

unit_expression for the plotmath equivalent used in plot axis labels.

Examples

unit_label("umol/m2/s/nm")
#> [1] "µmol m⁻² s⁻¹ nm⁻¹"
unit_label("W/m2/sr/nm")
#> [1] "W m⁻² sr⁻¹ nm⁻¹"