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earth

plot.earth.models

Compare earth models by plotting them.

Description

Compare earth models by plotting them.

Usage

## S3 method for class 'earth.models'
plot(x = stop("no 'x' argument"), which = c(1:2),
    caption = "", jitter = 0,
    col.grsq = discrete.plot.cols(length(objects)), lty.grsq = 1,
    col.rsq = 0, lty.rsq = 5,
    col.vline = col.grsq, lty.vline = "12",
    col.npreds = 0,  lty.npreds  = 2,
    legend.text = NULL, do.par = NULL, trace = 0,
    ...)

Arguments

`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 caption `NULL` generate a caption from the `$call` component of the `earth` objects.
`jitter`	Jitter applied to GRSq and RSq values to minimize over-plotting. Default is `0`, meaning no jitter. A typical useful value is 0.01. For the col arguments below, 0 means do not plot the corresponding graph element. You can use vectors of colors.
`col.grsq`	Vector of colors for the GRSq plot. The default is `discrete.plot.cols(length(x))` which is vector of distinguishable colors, the first three of which are also distinguishable on a monochrome printer. You can examine the colors using `earth:::discrete.plot.cols()`.
`lty.grsq`	Line type for the GRSq plot. Default is `1`.
`col.rsq`	Vector of colors for the RSq plot. Default is `0`, meaning no RSq plot.
`lty.rsq`	Line type for the RSq plot. Default is `5`.
`col.vline`	A vertical line is drawn for each object to show which model size was chosen for that object. The color of the line is `col.vline`. Default is `col.grsq`.
`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.npreds`	Vector of colors 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`).
`lty.npreds`	Line type of the "number of predictors" plot (in the Model Selection plot). Default is `2`.
`legend.text,do.par,trace`	Please see `plotres`
`...`	Please see `plotres`

Note

This function ignores GLM and cross-validation components of the earth model, if any.

Examples

data(ozone1)
a1 <- earth(O3 ~ .,          data = ozone1, degree = 2)
a2 <- earth(O3 ~ .-wind,     data = ozone1, degree = 2)
a3 <- earth(O3 ~ .-humidity, data = ozone1, degree = 2)
plot.earth.models(list(a1,a2,a3), ylim=c(.65,.85))

earth

Multivariate Adaptive Regression Splines

v5.3.0

GPL-3

Authors

Stephen Milborrow. Derived from mda:mars by Trevor Hastie and Rob Tibshirani. Uses Alan Miller's Fortran utilities with Thomas Lumley's leaps wrapper.

Initial release

plot.earth.models

Description

Usage

Arguments

Note

See Also

Examples

earth

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