At 08:00 PM 4/12/2009, Tom La Bone wrote:
Back in 2005 I had been doing most of my work in Mathcad for over 10 years. For a number of reasons I decided to switch over to R. After much effort and help from you folks I am finally "thinking" in R rather than thinking in Mathcad and trying to translating to R. Anyway, the only task I still use Mathcad for is calculations that involve physical quantities and units. For example, in Mathcad I can add 1 kilometer to 1 mile and get the right answer in the units of length I choose. Likewise, if I try to add 1 kilometer to 1 kilogram I get properly chastised. Is there a way in R to assign quantities and units to numbers and have R keep track of them like Mathcad does?
Yes, but it's a lot of work: Create objects with units as an attribute. Perhaps someone else can tell you if such a set of definitions already exists. ================================================================ Robert A. LaBudde, PhD, PAS, Dpl. ACAFS e-mail: r...@lcfltd.com Least Cost Formulations, Ltd. URL: http://lcfltd.com/ 824 Timberlake Drive Tel: 757-467-0954 Virginia Beach, VA 23464-3239 Fax: 757-467-2947 "Vere scire est per causas scire" ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
