SASxport (version 1.7.0)

Alfalfa: Example SAS data set

Description

Alfalfa data from Brian Yandell's book Practical Data Analysis for Designed Experiments.

Usage

data(Alfalfa)

Format

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

Details

Population "MAX" has slightly higher harvest volumes (HARV1 and HARV2) than population "min". (Surprise! Shock! Awe!)

References

Yandell, Brian S. Practical data analysis for designed experiments. Vol. 39. Crcd Press, 1997.

Examples

# NOT RUN {
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)
# }