To anyone who can help:
I have two brief questions concerning sapply. Following below is the
code for my example. The two problems are described at the end of the
code:
site <- rep(2:6, each = 12)
tillage <- rep(c(1,-1), each = 6, times = 5)
carbon <- c(18.23, 16.06, 17.81, 16.07, 17.26, 17.08,
14.92, 15.88, 12.11, 14.23, 16.99, 13.57,
20.34, 20.3, 18.78, 19.91, 18.43, 20.8,
18.98, 19.24, 18.18, 16.69, 19.72, 18.35,
36.83, 32.85, 30.21, 31.58, 34.35, 31.4,
27.72, 29.9, 25.97, 27.63, 28.13, 27.68,
23.11, 24.32, 21.87, 29.18, 26.52, 23.25,
24.16, 17.62, 19.62, 20.5, 21.01, 25.62,
25.73, 23.42, 25.17, 23.76, 23.27, 23.37,
20.89, 19.93, 19.24, 19.4, 22.09, 18.96)
junk <- interaction(tillage, site)
nr.carbon <- sapply(split(carbon, junk), function(x) mean(x))
-1.2 1.2 -1.3 1.3 -1.4 1.4 -1.5 1.5
14.61667 17.08500 18.52667 19.76000 27.83833 32.87000 21.42167 24.70833
-1.6 1.6
20.08500 24.12000
PROBLEM 1 -- How do I sort nr.carbon such that 1.2 comes before -1.2,
1.3 comes before -1.3, etc.
PROBLEM 2 -- How do I get rid of the pesky names automatically assigned
by sapply so that I only have the data in nr.carbon?
Thanks in advance to those who reply!
--------------------------------------
Philip Turk
Assistant Professor of Applied Statistics
Department of Mathematical Sciences
University of Alaska Anchorage
CAS #154N, 3211 Providence Drive
Anchorage, Alaska 99508
Phone: 907-786-1163
Fax: 907-786-6162
Email: afpjt at uaa.alaska.edu
Web Page: http://afpjt.uaa.alaska.edu