plotmix_3d: Plot the density or intensity of a normal mixture in 3d over...

In sppmix: Modeling Spatial Poisson and Related Point Processes

Description

When a normmix object is given, this function calculates the mixture density over a fine grid for the given window. When an intensity_surface object is given, the function multiplies the density with the surface lambda, and returns the Poisson mixture intensity function over the grid. Used for plotting.

For examples see

http://faculty.missouri.edu/~micheasa/sppmix/sppmix_all_examples.html#plotmix_3d

Usage

plotmix_3d(dens_image, title1 = "3d Surface (Density or Intensity)",
  zlims = NULL, grayscale = FALSE)

Arguments

dens_image	An image as an object of class im.
title1	A title for the 3d plot.
zlims	The limits of the z axis. Defaults to [0,1.1*max(dens_image)].
grayscale	Plot in gray scale. Default is FALSE (use colors).

Author(s)

Jiaxun Chen, Sakis Micheas, Yuchen Wang

See Also

rnormmix, dnormmix

Examples

truemix <- rnormmix(m = 5, sig0 = .1, df = 5, xlim= c(0, 3), ylim = c(0, 3))
normdens=dnormmix(truemix, xlim= c(0, 3), ylim = c(0, 3))
plotmix_3d(normdens)
plotmix_3d(normdens, title1="Density of a normal mixture")
#use the demo_mix and demo_truemix3comp objects; the windows are found in the
#corresponding demo demo_intsurf and demo_intsurf3comp
demo_intsurf$window
normdens1=dnormmix(demo_mix, xlim= c(0, 1), ylim = c(0, 1))
plotmix_3d(normdens1, title1="Density of a normal mixture, 2 components")
#change the window
normdens1=dnormmix(demo_mix, xlim= c(-1, 1.5), ylim = c(-1, 1.5))
plotmix_3d(normdens1, title1="Density of a normal mixture, 2 components")
demo_intsurf3comp$window
normdens2=dnormmix(demo_truemix3comp, xlim= c(-1, 1), ylim = c(-2, 3))
plotmix_3d(normdens2, title1="Density of a normal mixture, 3 components")

sppmix documentation built on Jan. 13, 2021, 10:04 p.m.