lamb {asreml} | R Documentation

## Footrot counts on lambs.

### Description

Counts of two footshape classes on 2513 lambs.

### Usage

    lamb

### Format

A data frame with 12 columns and 68 rows:

cyr

  Cross year, an integer vector with values 1 and 2

Grp

  A factor with 5 levels

Sex

  A factor with 2 levels

Sire

  A factor with 18 levels

xxx

  A numeric vector

tot

  Binomial totals for each sex, sire, group combination

l5

  Incidence of footshape class 2

l4

  Incidence of footshape class 1

ls

  Incidence of scald disease

lr

  Incidence of rot disease

prop

  Footshape class 2 (`l5`) as a proportion

fail

  Footshape class 2 failure counts (`1-l5`)

### Details

The feet of 2513 lambs born in 1980 and 1981 from 5 mating groups were scored in two footshape classes: 1) all four feet are normal, and 2) one foot is deformed. Two indicator variables were also recorded for the presence of the disease conditions scald and rot. The data is grouped into 68 sex, sire and mating group combinations.

### References

Gilmour AR, Anderson RD, Rae AL (1985). “The Analysis of Binomial Data by a Generalized Linear Mixed Model.” Biometrika, 72, 593–599.

[Package asreml version 4.1.0.176 Index]