Description Usage Format Details Source References Examples
Alfalfa data from Brian Yandell's book Practical Data Analysis for Designed Experiments.
1 |
A data frame with 40 observations on the following 6 variables.
POP
Population, a factor with levels MAX
and min
SAMPLE
Sample ID (0:5)
REP
Replicate (always 1)
SEEDWT
Seed weight
HARV1
Harvest 1 volume
HARV2
Harvest 2 volume
Population "MAX" has slightly higher harvest volumes (HARV1
and
HARV2
) than population "min". (Surprise! Shock! Awe!)
http://pages.stat.wisc.edu/~yandell/pda/data/Alfalfa/alfalfa.dat.
Yandell, Brian S. Practical data analysis for designed experiments. Vol. 39. Crcd Press, 1997.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | data(Alfalfa)
# go were the data is...
here <- getwd()
setwd(system.file("extdata",package="SASxport"))
# Description of the file contents
lookup.xport("Alfalfa.xpt")
# Load the file contents
Alfalfa <- read.xport("Alfalfa.xpt")
head(Alfalfa)
# return home
setwd(here)
# Just for fun, plot the data
par(mfrow=c(1,2))
plot( HARV1 ~ POP, data=Alfalfa)
plot( HARV2 ~ POP, data=Alfalfa)
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