[racket] Numbers with dimensions

Point taken.
So I've redesigned it somewhat, and now there are 2 calculation "modes":
- The normal mode is pretty much like Frink (probably the one you want),
which converts everything to base SI units. Conversion back to non base
units can be done afterwards.
- The "quoted" mode prevents a unit from being converted to SI base units.
It's useful if you want to add miles without having to convert back to
miles after the addition. It is also useful to read values from text files.
Such quoted units can still be converted to base units.

Quoted and normal units can be used together.

See several examples in the readme: https://github.com/Metaxal/measures

However, there is (yet?) no real notion of dimension and relations between
them.

All comments welcome.
Laurent


On Mon, Oct 28, 2013 at 7:54 AM, Konrad Hinsen
<konrad.hinsen at fastmail.net>wrote:

> Laurent writes:
>
>  > Indeed, the notion of dimension is not really what I was after. My
> intention was rather
>  > to provide a useful unit converter.
>
> Fair enough.
>
>  > If my current units are in N, and I multiply by square seconds, I
>  > think it's not always desirable for the measure to be automatically
>  > converted to m.kg.
>
> N/s^2 and m kg are the same unit, so there is nothing to convert. The
> normalized
> form in the SI system is m kg, so one could consider N/s^2 an alias for it.
>
> Konrad.
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>   Racket Users list:
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