WWheat {SASmixed}R Documentation

Winter wheat

Description

The WWheat data frame has 60 rows and 3 columns.

Format

This data frame contains the following columns:

Variety
an ordered factor with 10 levels
Yield
a numeric vector of yields
Moisture
a numeric vector of soil moisture contents

Details

Source

Littel, R. C., Milliken, G. A., Stroup, W. W., and Wolfinger, R. D. (1996), SAS System for Mixed Models, SAS Institute (Data Set 7.2).

Examples

library(SASmixed)
options(
  contrasts = c(unordered = "contr.SAS", ordered = "contr.poly"))
data(WWheat)