Display of fahrenheit units doesn't use degree symbol (º)

[Aariq]

Units for celsius display as ºC but units for degrees fahrenheit don't use the degree symbol. It would be nice if fahrenheit used the degree symbol also.

library(units)
#> udunits database from /usr/local/share/udunits/udunits2.xml
#both display as ºC
set_units(10, celsius)
#> 10 [°C]
set_units(10, "degC")
#> 10 [°C]

#neither display as ºF
set_units(10, fahrenheit)
#> 10 [fahrenheit]
set_units(10, "degF")
#> 10 [degF]

^{Created on 2023-01-30 with reprex v2.0.2}

[Enchufa2]

We don't do anything special for either of them. By default, we ask udunits2 for the symbol here, and then fall back to using the name. The thing is...

units:::ud_get_symbol("degC")
#> [1] "°C"
units:::ud_get_symbol("degF")
#> character(0)

udunits2 doesn't return any symbol for Fahrenheit. Not sure why, but this should be fixed upstream.

As a workaround, this works:

units::set_units(10, "°F")
#> 10 [°F]

[Aariq]

Ah, thanks. I had tried this with "ºF" (which is option + 0 on a macOS), but apparently that's not the same character!

> utf8ToInt("º")
[1] 186
> utf8ToInt("°")
[1] 176

[Enchufa2]

Reported upstream: Unidata/UDUNITS-2#115