plot.npnorm: Plotting a Nonparametric or Semiparametric Normal Mixture

In nspmix: Nonparametric and Semiparametric Mixture Estimation

Plotting a Nonparametric or Semiparametric Normal Mixture

Description

Function plot.npnorm plots the normal mixture.

Usage

## S3 method for class 'npnorm'
plot(
  x,
  mix,
  beta,
  breaks = NULL,
  col = 2,
  len = 100,
  add = FALSE,
  border.col = NULL,
  border.lwd = 1,
  fill = "lightgrey",
  main,
  lwd = 2,
  lty = 1,
  xlab = "Data",
  ylab = "Density",
  components = c("proportions", "curves", "null"),
  lty.components = 2,
  lwd.components = 2,
  ...
)

Arguments

x	an object of class npnorm.
mix	an object of class disc, for a discrete distribution.
beta	the structural parameter.
breaks	the rough number bins used for plotting the histogram.
col	the color of the density curve to be plotted.
len	the number of points roughly used to plot the density curve over the interval of length 8 times the component standard deviation around each component mean.
add	if FALSE, creates a new plot; if TRUE, adds the plot to the existing one.
border.col	color for the border of histogram boxes.
border.lwd	line width for the border of histogram boxes.
fill	color to fill in the histogram boxes.
main, lwd, lty, xlab, ylab	arguments for graphical parameters (see par).
components	if proportions (default), also show the support points and mixing proportions (in proportional vertical lines); if curves, also show the component density curves; if null, components are not shown.
lty.components, lwd.components	line type and width for the component curves.
...	arguments passed on to function plot.

Author(s)

Yong Wang <[e-mail]>

References

Wang, Y. (2007). On fast computation of the non-parametric maximum likelihood estimate of a mixing distribution. Journal of the Royal Statistical Society, Ser. B, 69, 185-198.

See Also

nnls, cnm, cnmms, plot.nspmix.

Examples

mix = disc(pt=c(0,4), pr=c(0.3,0.7))  # a discrete distribution
x = rnpnorm(200, mix, sd=1)
plot(x, mix, beta=1)

nspmix documentation built on June 8, 2025, 12:29 p.m.