I'm happy to share a package I wrote for using physical units in Julia, Unitful.jl <https://www.github.com/ajkeller34/Unitful.jl>. Much credit and gratitude is due to Keno Fischer for the SIUnits.jl <https://www.github.com/keno/SIUnits.jl> package which served as my inspiration. This is a work in progress, but I think perhaps a serviceable one depending on what you're doing.
Like SIUnits.jl, this package encodes units in the type signature to avoid run-time performance penalties. From there, the implementations diverge. The package is targeted to Julia 0.5 / master, as there are some limitations with how promote_op is used in Julia 0.4 (#13803) <https://github.com/JuliaLang/julia/pull/13803>. I decided it wasn't worth targeting 0.4 if the behavior would be inconsistent. Some highlights include: - Non-SI units are treated on the same footing as SI units, with only a few exceptions (unit conversion method). Use whatever weird units you want. - Support for units like micron / (meter Kelvin), where some of the units could cancel out but you don't necessarily want them to. - Support for LinSpace and other Range types. Probably there are still some glitches to be found, though. - Support for rational exponents of units. - Some tests (see these for usage examples). Please see the documentation for a comprehensive discussion, including issues / to do list, as well as how to add your own units, etc. Comments and feedback are welcome. Best, Andrew Keller
