sardata {sharx} | R Documentation |
Data Sets for the Study of the Species-Area Relationship
Description
Data sets for the study of the species-area relationship
Usage
data(sardata)
Format
A list of two data frames, see Details.
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
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.
Examples
## 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"))