Plot the cross-validation curve from a class `cvobj` object

Plots the cross-validation curve, and upper and lower standard deviation curves, as a function of the `lambda` values used.

# S3 method for cvobj
plot(x, sign.lambda = 1, log.lambda = TRUE, ...)

Arguments

x	A `"cvobj"` object.
sign.lambda	Either plot against `log(lambda)` (default) or its negative if `sign.lambda = -1`.
log.lambda	If `TRUE` (default), x-axis is `log(lambda)` instead of `lambda` (`log.lambda = FALSE`).
...	Other graphical parameters to plot.

Value

A plot is produced, and nothing is returned.