MassExtinctions: Mass Extinction Frequency

In abd: The Analysis of Biological Data

Description

The frequency of mass extinctions in the fossil record.

Usage

data(MassExtinctions)

Format

A data frame with 21 observations on the following 2 variables.

num.extinctions

a numeric vector

count

a numeric vector

Source

Raup, D.M. and J.J. Sepkoski, Jr. 1982. Mass extinctions in the marine fossil record. Science 215: 1501-1503.

References

http://www.sciencemag.org/cgi/content/abstract/sci;215/4539/1501

Examples

data(MassExtinctions)
MassExtinctions

Example output

Loading required package: nlme
Loading required package: lattice
Loading required package: grid
Loading required package: mosaic
Registered S3 method overwritten by 'mosaic':
  method                           from   
  fortify.SpatialPolygonsDataFrame ggplot2

The 'mosaic' package masks several functions from core packages in order to add 
additional features.  The original behavior of these functions should not be affected by this.

Attaching package: ‘mosaic’

The following objects are masked from ‘package:dplyr’:

    count, do, tally

The following object is masked from ‘package:Matrix’:

    mean

The following object is masked from ‘package:ggplot2’:

    stat

The following objects are masked from ‘package:stats’:

    binom.test, cor, cor.test, cov, fivenum, IQR, median, prop.test,
    quantile, sd, t.test, var

The following objects are masked from ‘package:base’:

    max, mean, min, prod, range, sample, sum

   num.extinctions count
1                0     0
2                1    13
3                2    15
4                3    16
5                4     7
6                5    10
7                6     4
8                7     2
9                8     1
10               9     2
11              10     1
12              11     1
13              12     0
14              13     0
15              14     1
16              15     0
17              16     2
18              17     0
19              18     0
20              19     0
21              20     1

abd documentation built on May 2, 2019, 4:46 p.m.