Fig7.3n <- function()
{
#  postscript(file = "Fig7.3.ps", horiz = F, height = 7, width = 4.5)
  par(mfcol = c(3, 2), mar = c(2, 2, 2, 1), mgp = c(5, 0.4, 0))
  rs <- c(57, 14, 55, 51, 30, 0, 53, 44, 34, 53, 49, 2)
  x <- (1:128)/128
  f1 <- 2 * sin(2 * pi * x)
  f2 <- c(rep(0, 32), rep(4, 64), rep(0, 32))
  .Random.seed <- rs
  y1 <- f1 + rnorm(128)
  y1wd <- wd(y1, filter.number = 5)
  plot(x, y1, cex = 0.55)
  lines(x, wr(threshold(y1wd, policy = "manual", type = "hard", levels = 
			0:6, value = 1.75)))
  mtext("Threshold = 1.75", side = 3, line = 0.1, cex = 0.6)
  plot(x, y1, cex = 0.55)
  lines(x, wr(threshold(y1wd, policy = "manual", type = "hard", levels = 
			0:6, value = 2.75)))
  mtext("Threshold = 2.75", side = 3, line = 0.1, cex = 0.6)
  plot(x, y1, cex = 0.55)
  lines(x, wr(threshold(y1wd, policy = "manual", type = "hard", levels = 
			0:6, value = 3.75)))
  mtext("Threshold = 3.75", side = 3, line = 0.1, cex = 0.6)
  .Random.seed <- rs
  y2 <- f2 + rnorm(128)
  y2wd <- wd(y2, filter.number = 5)
  plot(x, y2, cex = 0.55)
  lines(x, wr(threshold(y2wd, policy = "manual", type = "hard", levels = 
			0:6, value = 1.75)))
  mtext("Threshold = 1.75", side = 3, line = 0.1, cex = 0.6)
  plot(x, y2, cex = 0.55)
  lines(x, wr(threshold(y2wd, policy = "manual", type = "hard", levels = 
			0:6, value = 2.75)))
  mtext("Threshold = 2.75", side = 3, line = 0.1, cex = 0.6)
  plot(x, y2, cex = 0.55)
  lines(x, wr(threshold(y2wd, policy = "manual", type = "hard", levels = 
			0:6, value = 3.75)))
  mtext("Threshold = 3.75", side = 3, line = 0.1, cex = 0.6)
#  graphics.off()
  NULL
}