Plot Nonparametric or Semiparametric EM Output

Takes an object of class npEM and returns a set of plots of the density estimates for each block and each component. There is one plot per block, with all the components displayed on each block so it is possible to see the mixture structure for each block.

Usage

# S3 method for class 'npEM'
plot(x, blocks = NULL, hist=TRUE, addlegend = TRUE,
      scale=TRUE, title=NULL, breaks="Sturges", ylim=NULL, dens.col,
      newplot = TRUE, pos.legend = "topright", cex.legend = 1, ...)         
# S3 method for class 'spEM'
plot(x, blocks = NULL, hist=TRUE, addlegend = TRUE,
      scale=TRUE, title=NULL, breaks="Sturges", ylim=NULL, dens.col,
      newplot = TRUE, pos.legend = "topright", cex.legend = 1, ...)

Arguments

x

An object of class npEM such as the output of the npEM function

blocks

Blocks (of repeated measures coordinates) to plot; not relevant for univariate case. Default is to plot all blocks.

hist

If TRUE, superimpose density estimate plots on a histogram of the data

addlegend

If TRUE, adds legend to the plot.

scale

If TRUE, scale each density estimate by its corresponding estimated mixing proportion, so that the total area under all densities equals 1 and the densities plotted may be added to produce an estimate of the mixture density. When FALSE, each density curve has area 1 in the plot.

title

Alternative vector of main titles for plots (recycled as many times as needed)

breaks

Passed directly to the hist function

ylim

ylim parameter to use for all plots, if desired. If not given, each plot uses its own ylim that ensures that no part of the plot will go past the top of the plotting area.

dens.col

Color values to use for the individual component density functions, repeated as necessary. Default value is 2:(m+1).

newplot

If TRUE, creates a new plot.

pos.legend

Single argument specifying the position of the legend. See `Details' section of legend.

cex.legend

Character expansion factor for legend.

...

Any remaining arguments are passed to the hist and lines functions.

Value

plot.npEM returns a list with two elements:

x

List of matrices. The \(j\)th column of the \(i\)th matrix is the vector of \(x\)-values for the \(j\)th density in the \(i\)th plot.

y

\(y\)-values, given in the same form as the \(x\)-values.

See also

npEM, density.npEM, spEMsymloc, plotseq.npEM

Examples

## Examine and plot water-level task data set.

## First, try a 3-component solution where no two coordinates are
## assumed i.d.
data(Waterdata)
set.seed(100)
if (FALSE) { # \dontrun{
a <- npEM(Waterdata[,3:10], 3, bw=4)
par(mfrow=c(2,4))
plot(a) # This produces 8 plots, one for each coordinate
} # }

if (FALSE) { # \dontrun{
## Next, same thing but pairing clock angles that are directly opposite one
## another (1:00 with 7:00, 2:00 with 8:00, etc.)
b <- npEM(Waterdata[,3:10], 3, blockid=c(4,3,2,1,3,4,1,2), bw=4)
par(mfrow=c(2,2))
plot(b) # Now only 4 plots, one for each block
} # }