plot.PP3: Two types of plot for a PP3 object.

In PP3: Three-Dimensional Exploratory Projection Pursuit

Description

Either plot projected data (if number is specified) or histogram of projection indices over all random starts

Usage

## S3 method for class 'PP3'
plot(x, number, main, nbig = 10, colvec = 1, lab = NULL, ...)

Arguments

x	PP3 object that you wish to plot.
number	If missing, then the plot information concerning all of the project indices over all random starts (using function ix3sizeplot) or, if specified, plots the projected data associated with the number random start outcome (using function pdataplot.
main	Argument for main title.
nbig	If plotting information on all indices, this argument controls the number of the largest projection indices and their identification number.
colvec	If plotting the projected data, you can supply a vector of colour indices to colour each observation in the plot
lab	As for colvec, but permits a text label for each observation.
...	Other arguments to supply to the plot.

Details

This function can produce two types of plot. The first type, if the number argument is not supplied, produces a histogram of projection index values (in black) and superimposes the pseudo-index value density estimate, and median, upper quartile, 0.9 quantile and maximum values as vertical dotted lines.

If the number argument is specified, it should be one of the projection random start numbers and then the projected data associated with that maximised projection index is plotted. The points in the plot can be coloured (using colvec) or a text label supplied (using lab) argument.

Value

No specific value.

Author(s)

G. P. Nason

References

Friedman, J.H. and Tukey, J.W. (1974) A projection pursuit algorithm for exploratory data analysis. IEEE Trans. Comput., 23, 881-890.

Jones, M.C. and Sibson, R. (1987) What is projection pursuit? (with discussion) J. R. Statist. Soc. A, 150, 1-36.

Nason, G. P. (1995) Three-dimensional projection pursuit. J. R. Statist. Soc. C, 44, 411-430.

Nason, G. P. (2001) Robust projection indices. J. R. Statist. Soc. B, 63, 551-567.

See Also

ix3sizeplot, pdataplot, PP3many

Examples

#
# See example in help for \code{\link{PP3many}}
#

PP3 documentation built on May 2, 2019, 8:57 a.m.