Description Usage Arguments Author(s) See Also Examples
Generates a scatter plot of the input data of a svm
fit for
classification models by highlighting the classes and support
vectors. Optionally, draws a filled contour plot of the class regions.
1 2 3 
x 
An object of class 
data 
data to visualize. Should be the same used for fitting. 
formula 
formula selecting the visualized two dimensions. Only needed if more than two input variables are used. 
fill 
switch indicating whether a contour plot for the class regions should be added. 
grid 
granularity for the contour plot. 
slice 
a list of named values for the dimensions held constant (only needed if more than two variables are used). The defaults for unspecified dimensions are 0 (for numeric variables) and the first level (for factors). Factor levels can either be specified as factors or character vectors of length 1. 
symbolPalette 
Color palette used for the class the data points and support vectors belong to. 
svSymbol 
Symbol used for support vectors. 
dataSymbol 
Symbol used for data points (other than support vectors). 
... 
additional graphics parameters passed to

David Meyer
[email protected]
1 2 3 4 5 6 7 8 9 10 11 12 13 14  ## a simple example
data(cats, package = "MASS")
m < svm(Sex~., data = cats)
plot(m, cats)
## more than two variables: fix 2 dimensions
data(iris)
m2 < svm(Species~., data = iris)
plot(m2, iris, Petal.Width ~ Petal.Length,
slice = list(Sepal.Width = 3, Sepal.Length = 4))
## plot with custom symbols and colors
plot(m, cats, svSymbol = 1, dataSymbol = 2, symbolPalette = rainbow(4),
color.palette = terrain.colors)

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