Learn R Programming
FSAdata (version 0.3.3)

Croaker1: Ages of Atlantic Croaker assigned from otoliths by two readers.

Description

Otolith age of Atlantic croaker (Micropogonias undulatus) from two readers.

Arguments

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.

Topic(s)

  • Age Comparison
  • Age Precision
  • Age Bias
  • Ageing Error

Examples

Run this code
data(Croaker1)
str(Croaker1)
head(Croaker1)
plot(reader2~reader1,data=Croaker1)
xtabs(~reader1+reader2,data=Croaker1)

Run the code above in your browser using DataLab