xMLparameters {Pi} | R Documentation

## Function to visualise cross-validation performance against tuning parameters

### Description

`xMLparameters` is supposed to visualise cross-validation performance against tuning parameters.

### Usage

    xMLparameters(
    data,
    nD = c("auto", "1D", "2D", "3D"),
    contour = TRUE,
    main = "Repeated cross-validation",
    xlab = NA,
    ylab = NA,
    zlab = NA,
    clab = "AUC (repeated CV)",
    nlevels = 50,
    colormap = c("lightblue-lightyellow-darkorange-darkred", "bwr", "jet",
    "gbr", "wyr",
    "br", "yr", "rainbow", "wb"),
    highlight = TRUE,
    x.label.cex = 0.8,
    x.label.srt = 30,
    theta.3D = 40,
    phi.3D = 25
    )

### Arguments

`data` | an object of the class "train" or "train.formula" (resulting from caret::train) used for 1D or 2D visualisation. Alternatively, it can be a data frame used for 2D or 3D visualisation
`nD` | an integer specifying the dimension of the visualisation. It can be one of '1D', '2D' and '3D' and 'auto' (if input data is a "train" object)
`contour` | logical to indicate whether coutour plot should be also included
`main` | a title for the plot
`xlab` | a title for the x axis
`ylab` | a title for the y axis
`zlab` | a title for the z axis
`clab` | a title for the colorbar
`nlevels` | the number of levels to partition the input matrix values. The same level has the same color mapped to
`colormap` | short name for the colormap. It can be one of "jet" (jet colormap), "bwr" (blue-white-red colormap), "gbr" (green-black-red colormap), "wyr" (white-yellow-red colormap), "br" (black-red colormap), "yr" (yellow-red colormap), "wb" (white-black colormap), and "rainbow" (rainbow colormap, that is, red-yellow-green-cyan-blue-magenta). Alternatively, any hyphen-separated HTML color names, e.g. "blue-black-yellow", "royalblue-white-sandybrown", "darkgreen-white-darkviolet". A list of standard color names can be found in http://html-color-codes.info/color-names
`highlight` | logical whether to highlight the point with the maximum value
`x.label.cex` | the x-axis label size
`x.label.srt` | the x-axis label angle (in degree from horizontal)
`theta.3D` | the azimuthal direction. By default, it is 40
`phi.3D` | the colatitude direction. By default, it is 20

### Value

invisible

### Note

none

### See Also

`xSparseMatrix`

### Examples

    RData.location <- "http://galahad.well.ox.ac.uk/bigdata"
    ## Not run:
    xMLparameters(df_fit, nD="2D")
    xMLparameters(df_fit, nD="3D", theta.3D=40, phi.3D=60)

    ## End(Not run)

[Package Pi version 2.4.0 Index]