PlotWebByLevel | R Documentation |
A high-level function for plotting a food-web by vertically with the lowest trophic-level nodes at the bottom.
PlotWebByLevel(community, level='PreyAveragedTrophicLevel', max.nodes.per.row=20, round.levels.to.nearest=0.2, stagger=0.1, x.layout='wide', y.layout='compress', show.level.labels=TRUE, show.level.lines=FALSE, xaxt='n', yaxt='n', xlab='', ylab='', frame.plot=FALSE, ylim=NULL, ...)
community |
an object of class |
level |
either a function, a name that meets the criteria of the
|
max.nodes.per.row |
a number greater than 2. |
round.levels.to.nearest |
a number greater or equal to 0 and less than 1. |
stagger |
a number greater or equal to 0 and less than 1. Only used if
|
x.layout |
'skinny', 'narrow' or 'wide'. |
y.layout |
'stagger' or 'compress'. Only has an effect if
|
show.level.labels |
logical - if |
show.level.lines |
logical - if |
xaxt |
a character that specifies the type of the x axis. |
yaxt |
a character that specifies the type of the y axis. |
xlab |
title of the x axis. |
ylab |
title of the y axis. |
frame.plot |
logical - if |
ylim |
limits of the y axis |
... |
other values to |
If round.levels.to.nearest
is greater than 0, values in
level
are rounded to the nearest round.levels.to.nearest
.
Rounded values are used by the x.layout
and y.layout
engines.
If x.layout
is 'skinny' then nodes are spaced one x unit apart and
max.nodes.per.row
is ignored. If x.layout
is 'narrow',
nodes are spaced one x unit apart if fewer than max.nodes.per.row
on
that row, otherwise nodes are squashed in to the available x space. If
x.layout
is 'wide', nodes are spaced widely.
If y.layout
is 'compress', then nodes are always shown at the values in
level
. If y.layout
is 'stagger' and there are more than
max.nodes.per.row
on a level
then the plotted levels are
staggered by the values in stagger
.
Lawrence Hudson
Community
,
PlotBSpectrum
,
PlotCircularWeb
,
PlotNPS
,
PlotNPSDistribution
,
PlotNSpectrum
,
PlotRankNPS
,
PlotTLPS
# Compare prey-averaged and chain-averaged trophic level data(TL84) par(mfrow=c(1,2)) PlotWebByLevel(TL84, ylim=c(1,5.8), main='Prey-averaged') PlotWebByLevel(TL84, ylim=c(1,5.8), level='ChainAveragedTrophicLevel', main='Chain-averaged') # Compare the three different x layouts par(mfrow=c(1,3)) for(x.layout in c('skinny', 'narrow', 'wide')) { PlotWebByLevel(TL84, x.layout=x.layout, main=x.layout) } # Compare the effect of round levels before plotting # Different x-spacing of the four nodes around level 3 par(mfrow=c(1,2)) PlotWebByLevel(TL84, round.levels.to.nearest=0.2) PlotWebByLevel(TL84, round.levels.to.nearest=0) # Compare the effect of staggering levels # Primary producers are staggered in the second plot par(mfrow=c(1,2)) # No staggering - stagger and max.nodes.per.row are ignored PlotWebByLevel(TL84, y.layout='compress') # Stagger PlotWebByLevel(TL84, y.layout='stagger', stagger=0.1, max.nodes.per.row=20)
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