Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!
Get Started for Free

Croaker1

Ages of Atlantic Croaker assigned from otoliths by two readers.


Description

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

Topic(s)

  • Age Comparison

  • Age Precision

  • Age Bias

  • Ageing Error

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.

Examples

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

FSAdata

Data to Support Fish Stock Assessment ('FSA') Package

v0.3.8
GPL (>= 2)
Authors
Derek Ogle [aut, cre] (<https://orcid.org/0000-0002-0370-9299>)
Initial release
2019-05-17

We don't support your browser anymore

Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.