microtus {Flury} | R Documentation |
Microtus multiplex and M. subterraneus are difficult to distinguish morphologically. Here we have 43 known multiplex, 46 known subterraneus and a further 199 unidentified species.
data(microtus)
A data frame with 288 observations with a factor indicating the species and observations on a further 8 variables.
Group
multiplex
subterraneus
unknown
M1Left
M2Left
M3Left
Foramen
Pbone
Length
Height
Rostrum
89 species have been identified by means of chromosomal analysis.
Airoldi, J.-P., B. Flury, M. Salvioni (1996) dQuote{Discrimination between two species of Microtus using both classified and unclassified observations} Journal of Theoretical Biology 177:247-262
Flury, B.D. (1997) A First Course in Multivariate Statistics, New York: Springer
data(microtus) ## Not run: pairs(microtus[,-1], lower.panel = function(x, y){ points(x, y, pch = unclass(microtus[,1]), col = as.numeric(microtus[,1]))}, main = "Pairwise scatter plots for Microtus data") ## End(Not run)