View source: R/community_trophic_links.R
ResourcesByNode | R Documentation |
Functions that return the resources and consumers of nodes.
ResourcesByNode(community) ConsumersByNode(community) ResourcesAndConsumersByNode(community) ResourcesOfNodes(community, nodes) ConsumersOfNodes(community, nodes) TrophicLinksForNodes(community, nodes, node.properties=NULL, link.properties=NULL)
community |
an object of class |
nodes |
either the names or integer indices of nodes. |
node.properties |
passed to |
link.properties |
passed to |
ResourcesByNode
/ConsumersByNode
/
ResourcesAndConsumersByNode
all return a list of length
NumberOfNodes
; list elements are names of nodes that are
resources/consumers/resources and/or consumers.
If nodes
is of length one then ResourcesOfNodes
and
ConsumersOfNodes
return a vector of resources / consumers. If
nodes
contains more than one value, then a list of vectors is returned.
TrophicLinksForNodes
returns a data.frame
containing the columns
‘resource’ and 'consumer' and a row for each trophic link in-to and out-of
nodes
.
Either a vector
, a list
or a data.frame
Lawrence Hudson
TLPS
, PredationMatrix
,
NumberOfNodes
data(TL84) # A list containing a vector of resources for each node. ResourcesByNode(TL84) # A vector of resources of 'Umbra limi' ResourcesOfNodes(TL84, 'Umbra limi') # A vector of resources of 'Umbra limi' ResourcesOfNodes(TL84, 56) # A list containing vectors of resources for nodes 50:56 ResourcesOfNodes(TL84, 50:56) # A data.frame containin columns resource and consumer TrophicLinksForNodes(TL84, 'Umbra limi') # A data.frame containin columns resource, consumer, resource.M and consumer.M TrophicLinksForNodes(TL84, 'Umbra limi', node.properties='M')
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