PlotWagonWheel: Plot wagon wheel

Description

Plot a nodes as concentric circles around a focal node.

Usage

PlotWagonWheel(community,
               focus,
               clockwise=TRUE,
               origin.degrees=0,
               frame.plot=FALSE,
               main=NULL,
               ...)

Arguments

community: an object of class Community.
focus: the node to be placed at the centre of the plot - a node name or integer index.
clockwise: logical - if TRUE nodes are plotted in a clockwise order.
origin.degrees: the angle in degrees at which the first node in community will be placed.
frame.plot: logical.
main: the plot's title.
...: other values to PlotNPS.

Author

Lawrence Hudson

Details

The node given in focus is plotted at the centre of the wagon wheel. Other nodes in the community are plotted in concentric circles that are one, two, three etc trophic links away from the focus. Isolated nodes - those with no resources or consumers, other than possibly themselves - are not shown.

Examples

Run this code

data(TL84)
# Ploesoma sp. is the focal species
PlotWagonWheel(TL84, 'Ploesoma sp.')

# Show nodes as numbers
PlotWagonWheel(TL84, 'Ploesoma sp.', show.nodes.as='labels')

# 'Daphnia pulex' is the focus, nodes ordered by degree (total number of
# trophic links), lines partially transparent
PlotWagonWheel(OrderCommunity(TL84, 'Degree'), 'Daphnia pulex',
               show.nodes.as='labels', link.col=rgb(0.8,0.8,0.8,0.5))