| plot.earth.models {earth} | R Documentation |
Compare ‘earth’ models by plotting them.
plot.earth.models(x = stop("no 'x' arg"), which = c(1:2),
caption = "", rlim = c(0,1), jitter = 0,
col.grsq = discrete.plot.cols(length(x)),
col.rsq = 0, col.npreds = 0, col.cum = NULL,
col.vline = "grey", lty.vline = 3, col.legend = 1,
legend.pos = NULL, legend.text = NULL, do.par = TRUE,
main = "Model Comparison", ...)
x |
A list of one or more earth objects,
or a single earth object.
This is the only required argument.
(This argument is called 'x' for consistency with the generic plot).
|
which |
Which plots to plot: 1 model, 2 cumulative distribution of residuals.
Default is 1:2, meaning both.
|
caption |
Overall caption. Values:"string" string"" (default) no captionNULL generate a caption from the $call component of the earth objects.
|
rlim |
Two element vector c(min,max) specifying min and max
values on the y axis of the RSq/GRSq plot.
Default is c(0,1).
The special value min= -1 means the minimum y axis value
is the smallest GRSq or RSq, excluding the intercept.
The special value max= -1 means the maximum y axis value
is the largest GRSq or RSq.
|
jitter |
Jitter applied to GRSq and RSq values to minimise over-plotting.
Default is 0, meaning no jitter.
A typical useful value is 0.01.
|
|
For all the col arguments, 0 means do not plot the corresponding graph element. You can use vectors of colours for the col arguments. |
col.grsq |
Vector of colours for the GRSq plot.
The default is discrete.plot.cols(length(x)) which is vector
of distinguishable colours, the first three of which are also distinguishable on
a monochrome printer.
You can examine the colours using earth:::discrete.plot.cols().
|
col.rsq |
Vector of colours for the RSq plot.
Default is 0, meaning no RSq plot.
|
col.npreds |
Vector of colours for the ‘number of predictors’ plot within the model selection plot.
Default is 0, meaning no ‘number of predictors’ plot.
The special value NULL means borrow col.grsq
(or col.rsq if col.grsq is NULL).
|
col.cum |
Vector of colours for the cumulative distribution plot.
The special value NULL (default) means borrow col.grsq
(or col.rsq if col.grsq is NULL).
|
col.vline |
A vertical line is drawn for each object
to show which model size was chosen for that object.
The colour of the line is col.vline.
Default is "grey".
|
lty.vline |
Line type of vertical lines (a vertical line is drawn to show the selected model for each object).
Can be a vector.
Default is 3.
|
col.legend |
Default is 1, meaning draw a legend.
Use 0 for no legend.
The legend is drawn in the cumulative distribution graph,
if that graph is plotted.
Else the legend is drawn in the model comparison chart.
|
legend.pos |
The special value NULL (default) means position the legend automatically.
Else specify c(x,y) in user coords.
|
legend.text |
Vector of strings to use as legend text.
The special value NULL (default) means generate the legend text automatically
from call$formula.The following settings are related to par() and are included so you can override the defaults.
|
do.par |
Call par() for global settings as appropriate.
Default is TRUE,
which sets mfrow, mar=c(4,4,2,3), mgp=c(1.6,0.6,0), cex=0.7.
Set to FALSE if you want to append figures to an existing plot.
|
main |
Title of each plot.
Default is NULL, meaning generate figure headings automatically.
|
... |
Extra arguments passed to plotting functions. |
earth,
plot.earth,
plot.earth.models,
plotmo
data(ozone1) a1 <- earth(O3 ~ ., data = ozone1, degree = 2) a2 <- earth(O3 ~ .-wind, data = ozone1, degree = 2, nk = 31) a3 <- earth(O3 ~ .-humidity, data = ozone1, degree = 2, nk = 31) plot.earth.models(list(a1,a2,a3), rlim=c(.6,.8))