goulden.latin {agridat} | R Documentation |
Latin square experiment for testing fungicide
Description
Latin square experiment for testing fungicide
Usage
data("goulden.latin")
Format
A data frame with 25 observations on the following 4 variables.
trt
treatment factor, 5 levels
yield
yield
row
row
col
column
Details
Five treatments were tested to control stem rust in wheat. Treatment codes and descriptions: A = Dusted before rains. B = Dusted after rains. C = Dusted once each week. D = Drifting, once each week. E = Not dusted.
Source
Cyrus H. Goulden (1952). Methods of Statistical Analysis, 2nd ed. Page 216.
Examples
## Not run:
library(agridat)
library(agridat)
data(goulden.latin)
dat <- goulden.latin
libs(desplot)
desplot(dat, yield ~ col*row,
text=trt, cex=1, # aspect unknown
main="goulden.latin")
# Matches Goulden.
m1 <- lm(yield~ trt + factor(row) + factor(col), data=dat)
anova(m1)
## End(Not run)
[Package agridat version 1.23 Index]