| plot.cobs {cobs} | R Documentation |
The plot method for cobs objects.
If there was lambda selection, it provides two plots by default.
## S3 method for class 'cobs':
plot(x, which = if(x$select.lambda) 1:2 else 2,
show.k = TRUE,
col = par("col"), l.col = c("red","pink"), k.col = gray(c(0.6, 0.8)),
lwd = 2, cex = 0.4,
xlab = deparse(x$call[[2]]),
ylab = deparse(x$call[[3]]),
main = paste(deparse(x$call, width.cut = 100), collapse="\n"),
subtit= c("choosing lambda", "data & spline curve") , ...)
x |
object of class cobs. |
which |
integer vector specifying which plots should be drawn; |
show.k |
logical indicating if the “effective
dimensionality” k should also be shown. Only applicable when
which contains 1. |
col, l.col, k.col |
colors for plotting; k.col only
applies when show.k is true in the first plot (which
== 1) where l.col[2] and k.col[2] are only used as well,
for denoting “doubtful” points; col is only used for
the 2nd plot (which == 2). |
lwd, cex |
line width and point size for the 2nd plot
(i.e. which == 2). |
xlab, ylab, main |
axis annotation; see also axis. |
subtit |
a vector of length 2, specifying a sub title for each
plot (according to which). |
... |
further arguments passed and to internal
plot methods. |
plot(.) produces two side-by-side plots in case there was a
search for the optimal lambda(which = 1:2), and only the
(second) data plus spline curve plot otherwise (which = 2).
Martin Maechler
There are several other methods for COBS objects, see, e.g.
summary.cobs or predict.cobs.
cobs for examples.
example(cobs)
plot(Sbs)
plot(fitted(Sbs), resid(Sbs),
main = "Tukey-Anscombe plot for cobs()",
sub = deparse(Sbs$call))