R: Plot Tuning Object

plot.tune {e1071} | R Documentation

## Plot Tuning Object

### Description

Visualizes the results of parameter tuning.

### Usage

    ## S3 method for class 'tune'
    plot(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 = hsv_palette(),
              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 colors 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.

### Author(s)

David Meyer (based on C/C++-code by Chih-Chung Chang and Chih-Jen Lin)
David.Meyer@R-project.org

### See Also

`tune`

### Examples

      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)

[Package e1071 version 1.7-4 Index]