gx.2dproj.plot: Function to Display a Saved 2-d Projection Object

Description

Displays the 2-d projection saved from gx.2dproj, optionally the row numbers of the input matrix or the row identifiers, if available, may be displayed instead of the default plotting symbol.

Usage

gx.2dproj.plot(save, rowids = NULL, main = "", pch = 3, cex = 0.8, col = 1, ...)

Arguments

save

the saved object from gx.2dproj.

rowids

to display the input matrix row numbers set rowids = TRUE. Setting rowids = FALSE replaces the row numbers with the row identifiers from the input matrix. The default rowids = NULL causes the default symbol, a ‘+’ to be plotted.

main

an alternative plot title to that in the saved object from gx.2dproj, see Details below.

pch

by default a ‘+’, pch = 3 will be plotted. See Note below for alternate plotting symbols.

cex

by default symbols and characters are plotted at cex = 0.8, a 20% reduction in font size.

col

by default symbols and charcaters are plotted in black, col = 1, specify col = 2 to obtain red (see display.lty for the default colour palette). See Note below for alternate colours.

…

further arguments to be passed to methods concerning the plot. For example, if it is required to make the plot title smaller, add cex.main = 0.9 to reduce the font size by 10%.

Details

If main is undefined the plot title from the saved object from gx.2dproj is displayed. If no plot title is required set main = " ", or if a user defined plot title is required it should be defined in main, e.g., main = "Plot Title Text".

The x- and y-axis labels are those in the saved object from gx.2dproj and indicate the type of 2-d projection in the display.

References

Reimann, C., Filzmoser, P., Garrett, R. and Dutter, R., 2008. Statistical Data Analysis Explained: Applied Environmental Statistics with R. John Wiley & Sons, Ltd., 362 p.

Venables, W.N. and Ripley, B.D., 2001. Modern Applied Statistics with S-Plus, 3rd Edition, Springer, 501 p.

Examples

Run this code

# NOT RUN {
## Make test data available
data(sind.mat2open)

## Display default 2-d projection
sind.save <- gx.2dproj(sind.mat2open, ifilr = TRUE)

## Display saved object with more informative title
gx.2dproj.plot(sind.save,
main = "Howarth & Sinding-Larsen\nStream Sediments, ilr Transformed Data")

## Display saved object with row identifiers in a smaller blue font
gx.2dproj.plot(sind.save,
main = "Howarth & Sinding-Larsen\nStream Sediments, ilr Transformed Data",
rowids = TRUE, cex = 0.7, col = 4)

## Display 2-d projection after trimming the 3 most extreme samples
sind.2dproj.trim3 <- gx.2dproj(sind.mat2open, ifilr = TRUE, row.omits = c(13,15,16))
gx.2dproj.plot(sind.save,
main = "Howarth & Sinding-Larsen\nStream Sediments, ilr Transformed Data",
rowids = FALSE, cex = 0.7, col = 4)

## Clean-up
rm(sind.save)
rm(sind.2dproj.trim3)
# }