chaetocnema: Chaetocnema dataset

In localdepth: Local Depth

Description

The Chaetocnema dataset includes anatomical measures of 74 males of fleabeetles, of three different genera: Ch. Concinna (A, 21 cases), Ch. Heikertingeri (B, 31 cases) and Ch. Heptapotamica (C, 22 cases).

Usage

data(chaetocnema)

Format

Data frame with 74 observations on the following 8 variables.

X10

width of the first joint of the first tarsus in microns (the sum of measurements for both tarsi)

X12

the same for the second joint

X14

the maximal width of the aedeagus in the fore-part in microns

X18

the front angle of the aedeagus (1 unit = 7.5 degrees)

X40

the maximal width of the head between the external edges of the eyes in 0.01mm

X48

the aedeagus width from the side in microns

species

species of the fleabeetles. A factor with levels A: Ch. Concinna, B: Ch. Heikertingeri, C: Ch. Heptapotamica

area

colletion area of specimens. A factor with levels A: Environs of Uljianovsk, B: Khvalynsk, the Volga, C: Pern, D: Environs of Leningrad, E: the Ukraine, F: Ashkhabd, Turkmenistan, G: France, H: Ustj-Zilma, I: Gabra, Abkhazia, L: Ussuri district, M: Yakutsk district, N: Khabarovsk, O: Germany, P: Environs of Lake Issyk-Kul, Kirghizia, Q: Alma-ata, Kazachstan, R: Environs of Frunza, Kirghizia

Details

The aedeagus is the median lobe of the male genital capsule that is surrounded by the phallobase and through which the sperm duct traverses.

Source

A.A. Lubischew (1962) On the use of discriminant functions in taxonomy. Biometrics, 18:4, 455-477.

References

Hand, D.J., et al. (1994) A Handbook of Small Data Sets, London: Chapman & Hall, 254-255.

See Also

The dataset is also present in lubisch.

Examples

## Not run: 
data(chaetocnema)
lab <- chaetocnema[,7]
chaetocnema <- chaetocnema[,4:5]
set.seed(1234)
chaetosd <- apply(chaetocnema, 2, sd)
chaetocnema <- chaetocnema+cbind(rnorm(nrow(chaetocnema), 0,
  chaetosd[1]/100), rnorm(nrow(chaetocnema), 0, chaetosd[2]/100))


gx <- seq(min(chaetocnema[,1]), max(chaetocnema[,1]), length=60)
gy <- seq(min(chaetocnema[,2]), max(chaetocnema[,2]), length=60)
y <- as.matrix(expand.grid(gx, gy))

tauvolume <- quantile.localdepth(chaetocnema, probs=0.20, use='volume')
system.time(depthcontours <- localdepth(x=chaetocnema, y=y,
  tau=tauvolume, use='volume', method='simplicial'))
system.time(depthcontoursapprox <- localdepth(x=chaetocnema, y=y,
  tau=tauvolume, use='volume', method='simplicial', type='approx'))

par(mfrow=c(2,2))
plot(chaetocnema, pch=as.character(lab), main='Exact Simplicial Depth')
contour(x=gx, y=gy, z=matrix(depthcontours$depth/depthcontours$max.depth,
  nrow=length(gx), ncol=length(gy)), add=TRUE)

plot(chaetocnema, pch=as.character(lab), main='Approx Simplicial Depth')
contour(x=gx, y=gy,
z=matrix(depthcontoursapprox$depth/depthcontoursapprox$max.depth,
  nrow=length(gx), ncol=length(gy)), add=TRUE)

plot(chaetocnema, pch=as.character(lab), main='Exact Simplicial Local Depth, Tau=0.2')
contour(x=gx, y=gy, z=matrix(depthcontours$localdepth/depthcontours$max.localdepth,
  nrow=length(gx), ncol=length(gy)), add=TRUE)

plot(chaetocnema, pch=as.character(lab), main='Approx Simplicial Local Depth, Tau=0.2')
contour(x=gx, y=gy, z=matrix(depthcontoursapprox$localdepth/depthcontoursapprox$max.localdepth,
  nrow=length(gx), ncol=length(gy)), add=TRUE)

## End(Not run)

localdepth documentation built on May 29, 2017, 10:39 p.m.