Growth curves of pigs in a 3x3 factorial experiment
The dietox data frame has 861 rows and 7 columns.
dietox
This data frame contains the following columns:
Weight in Kg
Cumulated feed intake in Kg
Time (in weeks) in the experiment
Factor; id of each pig
Factor; vitamin E dose; see 'details'.
Factor, copper dose; see 'details'
Start weight in experiment, i.e. weight at week 1.
Factor, id of litter of each pig
Data contains weight of slaughter pigs measured weekly for 12 weeks. Data also contains the startweight (i.e. the weight at week 1). The treatments are 3 different levels of Evit = vitamin E (dose: 0, 100, 200 mg dl-alpha-tocopheryl acetat /kg feed) in combination with 3 different levels of Cu=copper (dose: 0, 35, 175 mg/kg feed) in the feed. The cumulated feed intake is also recorded. The pigs are littermates.
Lauridsen, C., Højsgaard, S.,Sørensen, M.T. C. (1999) Influence of Dietary Rapeseed Oli, Vitamin E, and Copper on Performance and Antioxidant and Oxidative Status of Pigs. J. Anim. Sci.77:906-916
data(dietox)
head(dietox)
## Not run:
if (require(ggplot2)){
qplot(Time, Weight, data=dietox, col=Pig) + geom_line() +
theme(legend.position = "none") + facet_grid(Evit~Cu)
} else {
coplot(Weight ~ Time | Evit * Cu, data=dietox)
}
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.