galapagos: Galapagos species data

In alr4: Data to Accompany Applied Linear Regression 4th Edition

Description

Johnson and Raven (1973) have presented data giving the number of species and related variables for 29 different islands in the Galapagos Archipelago.

Format

This data frame uses the island name as row labels and contains the following columns:

NS

Number of Species

ES

Number of endemic species (orrur only on that island)

Area

Surface area of island, hectares

Anear

Area of closest island, hectares

Dist

Distance to closest island, km

DistSC

Distance from Santa Cruz Island, km

Elevation

Elevation in m, missing values given as zero

EM

1 if elevation is observed, 0 if missing

Source

Johnson, M.P., and Raven, P.H. (1973). Species number and endemism: The Galapagos Archipelago revisited. Science, 179, 893-895.

References

Weisberg, S. (2014). Applied Linear Regression, 4th edition. Hoboken NJ: Wiley.

Examples

head(galapagos)

Example output

Loading required package: car
Loading required package: effects
Loading required package: carData

Attaching package: 'carData'

The following objects are masked from 'package:car':

    Guyer, UN, Vocab

lattice theme set by effectsTheme()
See ?effectsTheme for details.
             NS ES  Area  Anear Dist DistSC Elevation EM
Baltra       58 23 25.09   1.84  0.6    0.6        NA  0
Bartolome    31 21  1.24 572.33  0.6   26.3       109  1
Caldwell      3  3  0.21   0.78  2.8   58.7       114  1
Champion     25  9  0.10   0.18  1.9   47.4        46  1
Coamano       2  1  0.05 903.82  1.9    1.9        NA  0
Daphne_Major 18 11  0.34   1.84  8.0    8.0        NA  0

alr4 documentation built on May 2, 2019, 6:40 p.m.