Mating preference in 9 populations of three-spined sticklebacks.
     
    
    
    
    A data frame with 9 observations of one variable.
- preference.index
 
a numeric vector
 
 
 
    
    Source
    McKinnon, J. S., S. Mori, B.K. Blackman, L. David, D.M. Kingsley, L.
Jamieson, J. Chou, and D. Schluter. 2004. Evidence for ecology's role in
speciation. Nature 429: 294-298.
     
    
    
    Examples
    
SticklebackPreference
#>   preference.index
#> 1            -32.0
#> 2            -29.8
#> 3            -40.6
#> 4            -90.8
#> 5            -29.2
#> 6            -28.8
#> 7            -78.4
#> 8            -59.2
#> 9            -74.3
histogram(~ preference.index, SticklebackPreference)
dotplot(~ preference.index, SticklebackPreference)