New function orditkplot
with its support functions for interactive
ordination plots. The function will open a new Tcl/Tk window where
points are fixed at their ordination scores, but their labels can be
moved to better position with mouse or edited. The plot can be
exported in various graphics formats or saved in the R session
for further manipulation or re-created with R commands.
The function was transferred from vegan where it has been since 2008 (CRAN release 1.11-0).
The function adds a conditional dependency on tcltk package.
ordiplot3d
failed if input was a scores matrix instead of being a
list-style object.
rgl.isomap
could fail mysteriously with some extra arguments
(e.g. with type = "p"
).
ordiplot3d
can now set the exact aspect ratio in ordination
plots. Earlier we had a kluge that gave approximately correct
ratio. The package now depends on scatterplot3d version 0.3-40.ordirgl
failed when cex
was a variable instead of a number.
orglcluster
did not obey display
argument but always showed
"sites"
.
orglellipse
gained a new option kind = "ehull"
to draw ellipsoid
hulls or minimum volume ellipsoids that enclose all points of a
group
. The option is based on ellipsoidhull()
function
(cluster package).
ordirgl
allows suppressing display of environmental variables in
constrained ordination with envfit = NA
.
orglspider
was not exported.orditree3d
(based on scatterplot3d) and ordirgltree
(based
on rgl) draw a cluster dendrogram over a 2D ordination or any
other plane, for instance a map.
orglcluster
is similar to vegan ordicluster
and adds a
cluster dendrogam to an ordirgl
plot.
orglellipse
is similar to vegan ordiellipse
and adds
standard deviation, standard error or confidence ellipsoids to an
ordirgl
plot.
orglspantree
is similar to vegan lines.spantree
and adds a
minimum spanning tree to an ordirgl
plot.
Users have improved control of colours of plotted items. The
col
our can be a vector for points or text items plotted, or for
groups
of items drawn in the graph (orglellipse
, orglsegments
,
orglspider
). If the functions draws lines connecting points, the
line colour is a mixture of col
ours of connected points
(orditree3d
, ordirgltree
, orglcluster
, orglspantree
,
rgl.isomap
).
ordirgl
uses now small spheres instead of points with better
visual impact.
ordiplot3d
gained a scores
function making easier to add 2D
items with vegan ordiellipse
, ordihull
, ordispider
,
ordisegments
etc.