Full Leaf Shape Data Set

Description

Leaf length, width and petiole measurements taken at various sites worldwide. The leafshape17 data frame is the subset that has data for North Queensland sites.

Usage

data(leafshape)
data(leafshape17)

Format

This data frame contains the following columns:

bladelen

leaf length (in mm)

petiole

a numeric vector

bladewid

leaf width (in mm)

latitude

latitude

logwid

natural logarithm of width

logpet

logarithm of petiole

loglen

logarithm of length

arch

leaf architecture (0 = plagiotropic, 1 = orthotropic

location

a factor with levels Sabah, Panama, Costa Rica, N Queensland, S Queensland, Tasmania

Source

King, D.A. and Maindonald, J.H. 1999. Tree architecture in relation to leaf dimensions and tree stature in temperate and tropical rain forests. Journal of Ecology 87: 1012-1024.

Examples

library(MASS)
leaf17.lda <- lda(arch ~ logwid+loglen, data=leafshape17)
leaf17.hat <- predict(leaf17.lda)
leaf17.lda
 table(leafshape17$arch, leaf17.hat$class)
pause()

tab <- table(leafshape17$arch, leaf17.hat$class)
 sum(tab[row(tab)==col(tab)])/sum(tab)
leaf17cv.lda <- lda(arch ~ logwid+loglen, data=leafshape17, CV=TRUE)
tab <- table(leafshape17$arch, leaf17cv.lda$class)
pause()

leaf17.glm <- glm(arch ~ logwid + loglen, family=binomial, data=leafshape17)
 options(digits=3)
summary(leaf17.glm)$coef
pause()

leaf17.one <- cv.binary(leaf17.glm)
table(leafshape17$arch, round(leaf17.one$internal))     # Resubstitution
pause()

table(leafshape17$arch, round(leaf17.one$cv))           # Cross-validation