barley {vis}R Documentation

barley yields, ten locations in Minnesotta, 1931 and 1932

Description

Data frame with components: yield, variety, year, and site, giving barley yields (bushels/acre) in 1931 and 1932 for 10 varieties of barley grown at 6 sites.

Usage

data(barley)

Format

A data frame with 120 observations on the following 4 variables.

yield
a numeric vector
variety
an ordered factor with levels Svansota < No. 462 < Manchuria < No. 475 < Velvet < Peatland < Glabron < No. 457 < Wisconsin No. 38 < Trebi
year
an ordered factor with levels 1932 < 1931
site
an ordered factor with levels Grand Rapids < Duluth < University Farm < Morris < Crookston < Waseca

Details

Cleveland (1993) suggests the years 1931 and 1932 have been exchanged for Morris.

Source

All of the data sets from Cleveland (1993) can be obtained from Statlib by email or ftp. Send the message "send visualizing.data from S" to statlib@lib.stat.cmu.edu, or access lib.stat.cmu.edu by ftp, log in as statlib, and retrieve the file S/visualizing.data. trellis.datasets S-PLUS Language Reference S-Plus, trellis.datasets

References

Cleveland, William S. (1993). Visualizing Data. Hobart Press, Summit, New Jersey.

Examples

data(barley)

[Package vis version 1.0 Index]