plot.grpreg {grpreg}R Documentation

plot coefficients from a "grpreg" object

Description

Produces a plot of the coefficient paths for a fitted "grpreg" object.

Usage

## S3 method for class 'grpreg':
plot(x, color=TRUE, alpha=1, type="l", pch=1:p, lty=1,
xlab=expression(lambda), ylab=expression(hat(beta)), legend.loc, ...) 

Arguments

x Fitted "grpreg" model.
color TRUE for color plots, FALSE for black and white. Defaults to TRUE; overridden by col if both are specified.
alpha Controls alpha-blending. Default is alpha=1.
type Type of plot. Default is a line plot. See matplot for details.
lty Line type. Defaults to solid. See See matplot for details.
pch Plotting character. Defaults to no plotted characters. See matplot for details.
xlab Horizontal axis label.
ylab Vertical axis label.
legend.loc Where should the legend go? If left unspecified, no legend is drawn. See legend for details.
... Other graphical parameters to matplot

Author(s)

Patrick Breheny <patrick.breheny@uky.edu>

References

Breheny, P. and Huang, J. (2009) Penalized methods for bi-level variable selection. Statistics and its interface, 2: 369–380.

See Also

grpreg

Examples

data(birthwt.grpreg)
X <- as.matrix(birthwt.grpreg[,-1:-2])
y <- birthwt.grpreg$bwt
group <- c(1,1,1,2,2,2,3,3,4,5,5,6,7,8,8,8)
fit <- grpreg(X,y,group,penalty="gMCP",lambda.min=.5)
plot(fit)
plot(fit,color=FALSE)
plot(fit,color=TRUE,legend.loc="topleft")

[Package grpreg version 1.1 Index]