R: Plot the MAP partition, or add one to an existing plot
mapT
R Documentation
Plot the MAP partition, or add one to an existing plot
Description
Plot the maximum a' posteriori (MAP) tree from a "tgp"-class
object, or add one on top of an existing plot. Like plot.tgp,
projections and slices of trees can be plotted as specified
"tgp"-class object which is the output of one
the model functions with tree support (e.g. btgpllm)
proj
1-or-2-Vector describing the dimensions to be shown in a
projection. The argument is ignored for 1-d data, i.e., if x$d
== 1. For 2-d data, no projection needs to be specified— the
default argument (proj = NULL) will result in a 2-d plot.
1-d projections of 2-d or higher trees are are
supported, e.g., proj = c(2) would show the second variable
projection. For 3-d data or higher, proj=NULL defaults to
proj = c(1,2) which plots a 2-d projection of the trees
for the first two variables. Slices have priority over projections—
see next argument (slice)— when non-null arguments are
provided for both.
slice
list object with x and z fields, which
are vectors of equal length describing the slice to be plotted, i.e.,
which z-values of the treed partitions in the x$d - 2 inputs
x$X and x$XX should be fixed to in order to obtain a
2-d visualization.
For example, for 4-d data, slice = list(x=(2,4), z=c(0.2, 1.5) will
result in a 2-d plot of the first and third dimensions which have
the second and fourth slice fixed at 0.5 and 1.5. The default is
NULL, yielding to the proj argument. Argument is
ignored for 1-d data, i.e., if x$d == 1
add
Specify whether the to add partitions to an existing plot
(add = TRUE) or to make a new plot showing the data
out$X along with the partitions (default add = FALSE)
lwd
Plotting argument specifying the width of the lines used
to depict the partitions
...
Additional arguments to plot used when add = FALSE
Value
The only output of this function is a beautiful region-representation
of the MAP tree.
Note
For examples, see vignette("tgp") and the examples provided
in the documentation for the tgp.design function