cheddar (version 0.1-639)

TLPS: Trophic-link properties

Description

Returns a data.frame of first-class and computed trophic-link properties.

Usage

TLPS(community, node.properties=NULL, link.properties=NULL)

Value

A data.frame with NumberOfTrophicLinks rows.

Arguments

community

an object of class Community.

node.properties

the names of the node properties to return. Should meet the criteria of the properties parameter of NPS.

link.properties

the names of link properties. These can be names of first-class properties (returned by TrophicLinkPropertyNames) and names of functions that take a Community object as the only parameter and return either a vector of length NumberOfTrophicLinks or a matrix or data.frame with NumberOfTrophicLinks rows.

Author

Lawrence Hudson

Details

This function is named TLPS for Trophic Link PropertieS. It returns a data.frame containing the columns 'resource' and 'consumer' and any requested properties.

See Also

TrophicLinkPropertyNames, TLP, NumberOfTrophicLinks, NPS, Log10RCMRatio, ThreeNodeChains, TrophicChains

Examples

data(TL84)

# Just resource and consumer
head(TLPS(TL84))

# resource, consumer, resource.M and consumer.M
head(TLPS(TL84, node.properties='M'))

# Log10RCMRatio returns log10-transformed resource.M / consumer.M
head(TLPS(TL84, node.properties='M', link.properties='Log10RCMRatio'))

# Skipwith Pond has link.evidence and link.life.stage first-class properties
data(SkipwithPond)
head(TLPS(SkipwithPond))

# resource, consumer and link.evidence
head(TLPS(SkipwithPond, link.properties='link.evidence'))

# Skipwith Pond has diet.fraction first-class property
data(Benguela)
head(TLPS(Benguela))