walleye: Walleye length at age

In alr4: Data to Accompany Applied Linear Regression 4th Edition

Description

These data give length and age for over 3000 walleye (a type of fish) captured in Butternut Lake, Wisconsin, in three periods with different management method in place.

Format

A data frame with 3198 observations on the following 3 variables.

age

Age of the fish, years

length

Length, mm

period

1 = pre 1990, 2 = 1991-1996, 3=1997-2000

Source

Michelle LeBeau

References

Weisberg, S. (2014). Applied Linear Regression, 4th edition. Hoboken NJ: Wiley.

Examples

head(walleye)

Example output

Loading required package: car
Loading required package: carData
Loading required package: effects
lattice theme set by effectsTheme()
See ?effectsTheme for details.
  age   length period
1   1 215.2540      1
2   1 193.2576      1
3   1 202.5781      1
4   1 201.4597      1
5   1 232.0309      1
6   1 191.0207      1

alr4 documentation built on May 2, 2019, 6:40 p.m.