filled.legend <-
  function (x = seq(0, 1, length.out = nrow(z)), y = seq(0, 1, 
    length.out = ncol(z)), z, xlim = range(x, finite = TRUE), 
    ylim = range(y, finite = TRUE), zlim = range(z, finite = TRUE), 
    levels = pretty(zlim, nlevels), nlevels = 20, color.palette = cm.colors, 
    col = color.palette(length(levels) - 1), plot.title, plot.axes, 
    key.title, key.axes, asp = NA, xaxs = "i", yaxs = "i", las = 1, 
    axes = TRUE, frame.plot = axes, ...) 
{
  # modification of filled.contour by Carey McGilliard and Bridget Ferris
  # designed to just plot the legend
    if (missing(z)) {
        if (!missing(x)) {
            if (is.list(x)) {
                z <- x$z
                y <- x$y
                x <- x$x
            }
            else {
                z <- x
                x <- seq.int(0, 1, length.out = nrow(z))
            }
        }
        else stop("no 'z' matrix specified")
    }
    else if (is.list(x)) {
        y <- x$y
        x <- x$x
    }
    if (any(diff(x) <= 0) || any(diff(y) <= 0)) 
        stop("increasing 'x' and 'y' values expected")
  #  mar.orig <- (par.orig <- par(c("mar", "las", "mfrow")))$mar
  #  on.exit(par(par.orig))
  #  w <- (3 + mar.orig[2L]) * par("csi") * 2.54
    #layout(matrix(c(2, 1), ncol = 2L), widths = c(1, lcm(w)))
  #  par(las = las)
  #  mar <- mar.orig
  #  mar[4L] <- mar[2L]
  #  mar[2L] <- 1
  #  par(mar = mar)
   # plot.new()
    plot.window(xlim = c(0, 1), ylim = range(levels), xaxs = "i", 
        yaxs = "i")
    rect(0, levels[-length(levels)], 1, levels[-1L], col = col)
    if (missing(key.axes)) {
        if (axes) 
            axis(4)
    }
    else key.axes
    box()
}
    #
#    if (!missing(key.title)) 
#        key.title
#    mar <- mar.orig
#    mar[4L] <- 1
#    par(mar = mar)
#    plot.new()
#    plot.window(xlim, ylim, "", xaxs = xaxs, yaxs = yaxs, asp = asp)
#    if (!is.matrix(z) || nrow(z) <= 1L || ncol(z) <= 1L) 
#        stop("no proper 'z' matrix specified")
#    if (!is.double(z)) 
#        storage.mode(z) <- "double"
#    .Internal(filledcontour(as.double(x), as.double(y), z, as.double(levels), 
#        col = col))
#    if (missing(plot.axes)) {
#        if (axes) {
#            title(main = "", xlab = "", ylab = "")
#            Axis(x, side = 1)
#            Axis(y, side = 2)
#        }
#    }
#    else plot.axes
#    if (frame.plot) 
#        box()
#    if (missing(plot.title)) 
#        title(...)
#    else plot.title
#    invisible()
#}