| 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.
Groupmultiplex subterraneus unknownM1LeftM2LeftM3LeftForamenPboneLengthHeightRostrum89 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)