$rotation
screeplot(my.pca, npcs=3, type=lines)
biplot(my.pca)
In the R console...
?read.table -- getting the data into a data.frame
?prcomp
OR
?princomp -- for the PCA (see 'center' and 'scale' options)
?biplot -- for the biplot
?screeplot -- for a scree plot
HTH,
Dave Hewitt
-sig-ecology listserv that was just
announced. Join us:
https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
--
Dave Hewitt
Research Fishery Biologist
USGS Klamath Falls Field Station (OR)
--and--
Student
VIMS, College of William Mary (VA)
http://www.vims.edu/fish
Is there the equivalent of the ESA in Canada, would anyone know,
please? And any references for the history of ecology as it developed in
Canada?
CSEE might be in the ballpark -- http://ecoevo.ca/en/index.htm
Dave Hewitt
VIMS, Gloucester, VA USA
in to a situation where you can go back and use repeated
samples to check on detectability, you're in the world of occupancy models.
For an intro, see:
http://www.uvm.edu/envnr/vtcfwru/spreadsheets/occupancy/occupancy.htm
Dave Hewitt
VIMS, Gloucester Point, VA
At 01:58 PM 1/14/2008 +0100, you wrote
in
getting a good model, not testing.
I've always found Ben Bolker's flow chart for models helpful - pg. 397
(http://www.zoo.ufl.edu/bolker/emdbook/).
Dave Hewitt
VIMS, Gloucester Point, VA
At 03:38 PM 1/12/2008 -0400, you wrote:
Hello Ecolog - I was wondering if anyone had any advice
Georgia
Carrollton, GA 30118-3100
Phone: 678-839-4061
Fax: 678-839-4071
http://www.westga.edu/~pnovackg
~
Dave Hewitt
VIMS, Gloucester Point, VA
in with
the lowest percentages.
Figure 2 (pg. 5) is pretty interesting... only 50-64% of faculty at
specifically religious schools express strong spirituality. Huh?
Dave Hewitt
At 11:04 PM 8/21/2007 -0500, Malcolm McCallum wrote:
Check out the Chronicle of Higher Education, seems like
appreciated.
Thanks
Sara E. Viernum
Clifford J. Webb
All persons, living or dead, are purely coincidental.
K. Vonnegut
-
Dave Hewitt
Fisheries Science/Crustacean Ecology
Virginia Institute of Marine Science
College of William
