leafshape dataset

Full Leaf Shape Data Set

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. data

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