"summary.qsreg" <-
function (x, ...) 
{
    digits <- 4
    c1 <- "Number of Observations:"
    c2 <- (x$N)
    c1 <- c(c1, "Effective degrees of freedom:")
    c2 <- c(c2, format(round(x$trace[x$ind.cv.ps], 1)))
    c1 <- c(c1, "Residual degrees of freedom:")
    c2 <- c(c2, format(round(x$N - x$trace[x$ind.cv.ps], 1)))
    c1 <- c(c1, "Log10(lambda)")
    c2 <- c(c2, format(round(log10(x$cv.grid[x$ind.cv.ps,1]), 2)))
    sum <- cbind(c1, c2)
    dimnames(sum) <- list(rep("", dim(sum)[1]), rep("", dim(sum)[2]))
    cat("Call:\n")
    dput(x$call)
    print(sum, quote = FALSE)
    invisible(x)
}