R: Plotting the 2-d partitions of classification methods

drawparti {klaR} | R Documentation

## Plotting the 2-d partitions of classification methods

### Description

Plot showing the classification of observations based on classification methods (e.g. `lda`, `qda`) for two variables. Moreover, the classification borders are displayed and the apparent error rates are given in each title.

### Usage

    drawparti(grouping, x, y, method = "lda", prec = 100, xlab = NULL,
        ylab = NULL, col.correct = "black", col.wrong = "red",
        col.mean = "black", col.contour = "darkgrey",
        gs = as.character(grouping), pch.mean = 19, cex.mean = 1.3,
        print.err = 0.7, legend.err = FALSE, legend.bg = "white",
        imageplot = TRUE, image.colors = cm.colors(nc),
        plot.control = list(), ...)

### Arguments

`grouping` | factor specifying the class for each observation.
`x` | first explanatory vector.
`y` | second explanatory vector.
`method` | the method the classification is based on, currently supported are: `lda`, `qda`, `rpart`, `naiveBayes`, `rda`, `sknn` and `svmlight`

.

`prec` | precision used to draw the classification borders (the higher the more precise; default: 100).
`xlab` | a title for the x axis.
`ylab` | a title for the y axis.
`col.correct` | color for correct classified objects.
`col.wrong` | color for wrong classified objects.
`col.mean` | color for class means (only for methods `lda` and `qda`).
`col.contour` | color of the contour lines (if `imageplot = FALSE`).
`gs` | group symbol (plot character), must have the same length as `grouping`.
`pch.mean` | plot character for class means (only for methods `lda` and `qda`).
`cex.mean` | character expansion for class means (only for methods `lda` and `qda`).
`print.err` | character expansion for text specifying the apparent error rate. If `print.err = 0`, nothing is printed.
`legend.err` | logical; whether to plot the apparent error rate above the plot (if `FALSE`), or into a legend into the upper right corner of the plot (if `TRUE`). This argument is ignored, if `print.err = 0`, i.e. if no error rate is printed.
`legend.bg` | Backgound colour to use for the legend.
`imageplot` | logical; whether to use an `image` plot or `contour` lines.
`image.colors` | colors used for the `imageplot`, if TRUE.
`plot.control` | A list containing further arguments passed to the underlying plot functions.
`...` | Further arguments passed to the classification `method`.

### Author(s)

Karsten Luebke, karsten.luebke@fom.de, Uwe Ligges, Irina Czogiel

### See Also

`partimat`

[Package klaR version 0.6-12 Index]