Message-ID: <0FA29A23-A587-463D-B545-3392117FA469@comcast.net>
Date: 2011-12-08T15:57:17Z
From: David Winsemius
Subject: Representation of scientific units
In-Reply-To: <E1RYerN-0003g8-7Z@mea>
On Dec 8, 2011, at 9:22 AM, Stephen Eglen wrote:
> Has anyone got a neat way in R to handle scientific units along with
> numeric
> vectors?
Not really. There is limited support for conversions as well. I have
wondered about this after addressing a similar question on Stack
Overflow:
http://stackoverflow.com/questions/7214781/converting-units-in-r/7215430#7215430
> e.g. in mathematica, there is a Units package to allow you to
> do the following:
>
> 85 Meter/Second * 10 Second
>
> answer: 850 Meter
As a program that was originally design to symbolic algebra it is not
surprising to find such methods in Mathematica. I have looked around
for examples of implementations in other languages and have found them
in LisP and in PERL
http://www.cs.utexas.edu/users/novak/units.html
http://search.cpan.org/~klortho/Physics-Unit-0.04/lib/Physics/Unit.pm
>
> (taken from http://library.wolfram.com/howtos/units/)
--
David Winsemius, MD
West Hartford, CT