R: Growth curves of pigs in a 3x3 factorial experiment

dietox {geepack} | R Documentation

## Growth curves of pigs in a 3x3 factorial experiment

### Description

The `dietox` data frame has 861 rows and 7 columns.

### Usage

    data(dietox)

### Format

This data frame contains the following columns:

Weight

  a numeric vector

Feed

  a numeric vector

Time

  a numeric vector

Pig

  a numeric vector

Evit

  a numeric vector

Cu

  a numeric vector

Litter

  a numeric vector

### Source

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

### Examples

    data(dietox)
    dietox$Cu     <- as.factor(dietox$Cu)
    gee01 <- geeglm (Weight ~ Time + Cu + Cu * Time, id =Pig, data = dietox,
             family=gaussian,corstr="ex")

    mf <- formula(Weight~Cu*(Time+I(Time^2)+I(Time^3)))
    gee1 <- geeglm(mf, data=dietox, id=Pig, family=poisson("identity"),corstr="ar1")
    summary(gee1)
    anova(gee1)

[Package geepack version 1.2-1 Index]