svmpath (version 0.970)

plot.svmpath: plot the svm solution at a step along the path

Description

produces a plot of the svm solution along the path, and optinally indicates support points

Usage

# S3 method for svmpath
plot(x, step, Size = 60, elbow.show = TRUE, support.show = TRUE, ...)

Arguments

x

the svmpath object

step

which step to plot; default is the last step. Use summary to see how many steps

Size

If the solution is non-linear, this is the gridsize for countour

elbow.show

Should the points on the elbow be indicated

support.show

Should the support points be indicated

…

additional arguments to plot, allowing one to change, for example, "main", "xlab" etc

Value

A list is returned silently, with the ingredients of the plot

Details

A two-dimensional plot is produced of the SVM solution. Makes sense only if X is two-dimensional. If not, the first two dimensions will be used

References

The paper http://www-stat.stanford.edu/~hastie/Papers/svmpath.pdf, as well as the talk http://www-stat.stanford.edu/~hastie/TALKS/svmpathtalk.pdf.

See Also

coef.svmpath, svmpath, predict.svmpath, print.svmpath,summary.svmpath

Examples

# NOT RUN {
data(svmpath)
attach(balanced.overlap)
fit <- svmpath(x,y,trace=TRUE,plot=FALSE)
plot(fit,step=2)
detach(2)
# }