Otolith age of Atlantic croaker (Micropogonias undulatus) from two readers.
Format
A data frame of 317 observations on the following 2 variables:
- reader1
Age assigned by the first reader
- reader2
Age assigned by the second reader
Source
From Figure 2 in Chapter 1 (Atlantic Croaker) of the VMRC Final Report on Finfish Ageing, 1999 by the Center for Quantitative Fisheries Ecology at Old Dominion University. CSV file
Examples
data(Croaker1)
str(Croaker1)
#> 'data.frame': 317 obs. of 2 variables:
#> $ reader1: int 1 1 1 2 2 2 2 2 2 2 ...
#> $ reader2: int 1 1 1 2 2 2 2 2 2 2 ...
head(Croaker1)
#> reader1 reader2
#> 1 1 1
#> 2 1 1
#> 3 1 1
#> 4 2 2
#> 5 2 2
#> 6 2 2
plot(reader2~reader1,data=Croaker1)
xtabs(~reader1+reader2,data=Croaker1)
#> reader2
#> reader1 1 2 3 4 5 6 7 8 9 10
#> 1 3 0 0 0 0 0 0 0 0 0
#> 2 0 34 0 0 0 0 0 0 0 0
#> 3 0 1 29 0 0 0 0 0 0 0
#> 4 0 0 1 17 3 0 0 0 0 0
#> 5 0 0 0 1 58 4 0 0 0 0
#> 6 0 0 0 0 0 26 2 0 0 0
#> 7 0 0 0 0 0 5 52 0 0 0
#> 8 0 0 0 0 0 0 1 36 2 0
#> 9 0 0 0 0 0 0 0 1 39 0
#> 10 0 0 0 0 0 0 0 0 0 1
#> 11 0 0 0 0 0 0 0 0 0 1