echinacea {aster}

Life History Data on Echinacea angustifolia

Description

Data on life history traits for the narrow-leaved purple coneflower Echinacea angustifolia

Usage

data(echinacea)

Format

A data frame with records for 570 plants observed over three years.

ld02

Indicator of being alive in 2002.

ld03

Ditto for 2003.

ld04

Ditto for 2004.

fl02

Indicator of flowering 2002.

fl03

Ditto for 2003.

fl04

Ditto for 2004.

hdct02

Count of number of flower heads in 2002.

hdct03

Ditto for 2003.

hdct04

Ditto for 2004.

pop

the remnant population of origin of the plant (all plants were grown together, pop encodes ancestry).

ewloc

east-west location in plot.

nsloc

north-south location in plot.

Source

Stuart Wagenius, https://www.chicagobotanic.org/research/staff/wagenius

References

These data are analyzed in the following.

Geyer, C. J., Wagenius, S., and Shaw, R. G. (2007) Aster Models for Life History Analysis. Biometrika, 94, 415–426. doi:10.1093/biomet/asm030.

Examples

library(aster)
data(echinacea)
vars <- c("ld02", "ld03", "ld04", "fl02", "fl03", "fl04",
    "hdct02", "hdct03", "hdct04")
redata <- reshape(echinacea, varying = list(vars), direction = "long",
    timevar = "varb", times = as.factor(vars), v.names = "resp")
names(echinacea)
dim(echinacea)
names(redata)
dim(redata)