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e1071 (version 1.3-16)

plot.tune: Plot tuning object

Description

Visualizes the results of parameter tuning.

Usage

plot.tune(x, type = c("contour", "perspective"), theta = 60,
          col = "lightblue", main = NULL, xlab = NULL, ylab = NULL,
          swapxy = FALSE, transform.x = NULL, transform.y = NULL,
          transform.z = NULL, color.palette = topo.colors,
          nlevels = 20, ...)

Arguments

x
an object of class tune
type
choose whether a contour plot or a perspective plot is used if two parameters are to be visualized. Ignored if only one parameter has been tuned.
theta
angle of azimuthal direction.
col
the color(s) of the surface facets. Transparent colours are ignored.
main
main title
xlab, ylab
titles for the axes. N.B. These must be character strings; expressions are not accepted. Numbers will be coerced to character strings.
swapxy
if TRUE, the parameter axes are swaped (only used in case of two parameters).
transform.x, transform.y, transform.z
functions to transform the parameters (x and y) and the error measures (z). Ignored if NULL.
color.palette
color palette used in contour plot.
nlevels
number of levels used in contour plot.
...
Further graphics parameters.

See Also

tune

Examples

Run this code
data(iris)
  obj <- tune.svm(Species~., data = iris, sampling = "fix",
                  gamma = 2^c(-8,-4,0,4), cost = 2^c(-8,-4,-2,0))
  plot(obj, transform.x = log2, transform.y = log2)
  plot(obj, type = "perspective", theta = 120, phi = 45)

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