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#' method plot cv.relaxed
#' @importFrom shape colorlegend
#' @param se.bands Should shading be produced to show standard-error bands;
#' default is \code{TRUE}
#' @rdname plot.cv.glmnet
#' @export
plot.cv.relaxed <- function (x, se.bands=TRUE,...)
{
xr=x$relaxed
oldpar = par(mar = c(4, 4, 3, 4))
on.exit(par(oldpar))
statlist=xr$statlist
gamma=xr$gamma
ngamma=length(gamma)
ylim=range(unlist(lapply(statlist,"[[","cvm")))
if(se.bands){
cvup=lapply(statlist,"[[","cvup")
cvlo=lapply(statlist,"[[","cvlo")
ylim=range(ylim,unlist(cvup),unlist(cvlo))
}
xlim=log(range(unlist(lapply(statlist,"[[","lambda")))+0.00001)
cvcolors = rainbow(ngamma, start = .1, end = 1)
with(statlist[[ngamma]],plot(log(lambda), cvm, type = "n", xlab = expression(Log(lambda)),
ylab = x$name,ylim=ylim,xlim=xlim))
if(se.bands){
for (i in seq(ngamma))
with(statlist[[i]],polygon(c(log(lambda),rev(log(lambda))),c(cvup,rev(cvlo)),
col="floralwhite",border="antiquewhite"))
}
for (i in seq(ngamma))
with(statlist[[i]],lines(log(lambda), cvm, lwd = 2, col = cvcolors[i]))
mins=log(c(xr$lambda.min,xr$lambda.1se))
abline(v=mins,lty=3)
dof= statlist[[1]]$nzero
lambda=statlist[[1]]$lambda
axis(side = 3, at = log(lambda), labels = paste(dof),
tick = FALSE, line = 0)
# dof=c(x$nzero.min,x$nzero.1se)
# axis(3, at = mins, labels = format(dof), tick=FALSE, line = 0,cex.axis=.9)
colorlegend(posy = c(0.2, 0.8), posx = c(0.93, 0.945)-.03, col = rainbow(ngamma,
start = 0.1, end = 1), zlim = c(0, 1), zval = gamma , main = expression(gamma),digit=2)
invisible()
}
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