Convert between angular frequency and frequency

[jamesgardner1421]

Is this the intended behaviour when converting units involving angles?

julia> ω = 1u"rad*s^-1"
1 rad s^-1

julia> uconvert(u"s^-1", ω)
1 s^-1

I believe the correct result should be 1/2π s^-1. If the conversion is not intended, perhaps a DimensionError should be thrown instead?

[derikk]

This occurs because radians are defined in pkgdefaults.jl as dimensionless and numerically equal to 1:

Unitful.jl/src/pkgdefaults.jl

Line 66 in b44c335

@unit rad "rad" Radian 1 true

If you want revolutions per second, you can instead convert to rps:

julia> ω = 1u"rad/s"
1 rad s⁻¹

julia> uconvert(u"rps", ω)
0.15915494309189535 rps

Alternatively, converting to Hz2π will get you the same numerical result.

julia> uconvert(u"Hz2π", ω)
0.15915494309189535 Hz2π

[jamesgardner1421]

Ah ok, that makes sense, thanks!

[cmichelenstrofer]

@jamesgardner1421 checkout DimensionfulAngles.jl and in particular this Equivalence.