"plotSpecCar" <-
function (x, add = FALSE, ci = 0.95, log = "dB", xlab = "frequency", 
    ylab = NULL, type = "l", main = NULL, sub = NULL,...) 
{
    if (is.null(ylab)) 
        ylab <- if (log == "dB") 
            "spectrum (dB)"
        else "spectrum"
    if (is.logical(log)) 
        log <- if (log) 
            "yes"
        else "no"
    if (missing(log) && getOption("ts.S.compat")) 
        log <- "dB"
    log <- match.arg(log)
    ylog <- ""
    if (log == "dB") 
        x$spec <- 10 * log10(x$spec)
    if (log == "yes") 
        ylog <- "y"
    if (add) {
        matplot(x$freq, x$spec, type = type, add = TRUE, ...)
    }
    else {
        matplot(x$freq, x$spec, xlab = xlab, ylab = ylab, type = type, log = ylog)
#        if (ci <= 0 || !is.numeric(x$df) || log == "no") {
#            ci.text <- ""
#        }
#        else {
#            conf.lim <- spec.ci(x, coverage = ci)
#            if (log == "dB") {
#                conf.lim <- 10 * log10(conf.lim)
#                conf.y <- max(x$spec) - conf.lim[2]
#                conf.x <- max(x$freq) - x$bandwidth
#                lines(rep(conf.x, 2), conf.y + conf.lim)
#                lines(conf.x + c(-0.5, 0.5) * x$bandwidth, rep(conf.y, 
#                  2))
#                ci.text <- paste(", ", round(100 * ci, 2), "% C.I. is (", 
#                  paste(format(conf.lim, digits = 3), collapse = ","), 
#                  ")dB", sep = "")
#            }
#            else {
#                ci.text <- ""
#                conf.y <- max(x$spec)/conf.lim[2]
#                conf.x <- max(x$freq) - x$bandwidth
#                lines(rep(conf.x, 2), conf.y * conf.lim)
#                lines(conf.x + c(-0.5, 0.5) * x$bandwidth, rep(conf.y, 
#                  2))
#            }
#        }
          if (is.null(main)) 
            main <- paste(x$method, sep = "\n")
        if (is.null(sub) && is.numeric(x$bandwidth)) 
            sub <- paste("bandwidth = ", format(x$bandwidth,                 digits = 3), sep = "")
          title(main = main,sub=sub)
      }
    invisible(x)
}
