sardata: Data Sets for the Study of the Species-Area Relationship
In psolymos/sharx: Models and Data Sets for the Study of Species-Area Relationships

Description Usage Format Details References Examples

Data sets for the study of the species-area relationship

1	data(sardata)

A list of two data frames, see Details.

The element sardata$islands is a data frame with variables:

study: Factor, levels are the study identifiers.
id: Numeric, island identifiers according to the original references.
S: Numeric, number of species according to the original references.
A: Numeric, area of the island in square kilometres, according to the original references.

The element sardata$studies is a data frame with variables:

study: Factor, levels are the study identifiers.
taxon.group: Factor, taxonomic group.
island.type: Factor, island type.
latitude: Numeric, middle band of latitude for the study calculated as (min + max) / 2, where min is the latitude close to the Equator, max is the latitude close to the poles.
extent: Numeric, latitudinal extent of the study.
location: Character, location of the study.

References are in the files sardata.txt and sardata.bib in the sharx library of R, labelled by study identifiers. See examples on how to recall the files from the console.

## data structure
data(sardata)
str(sardata$islands)
str(sardata$studies)
## references
file.show(system.file(package = "sharx", "sardata.txt"))
file.show(system.file(package = "sharx", "sardata.bib"))