agridat (version 1.8.1)

gomez.seedrate: Rice yield at six different densities

Description

Rice yield at six different densities

source

Gomez, K.A. and Gomez, A.A.. 1984, Statistical Procedures for Agricultural Research. Wiley-Interscience. Page 26. Used with permission of Kwanchai Gomez.

Details

Rice yield at six different densities.

Examples

dat <- gomez.seedrate

require(lattice)
#xyplot(yield ~ rate, data=dat, group=rep)
bwplot(yield ~ rate, data=dat, horizontal=FALSE)
# Quadratic response
m1 <- lm(yield ~ poly(rate,2), dat)