rgr: gx.2dproj.plot – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

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.

Note

The available symbols are:
pch: 0 = square, 1 = circle, 2 = triangle, 3 = plus, 4 = X,
5 = diamond, 6 = upside-down triangle, 7 = square with X,
8 = asterisk, 9 = diamond with plus, 10 = circle with plus,
11 = double triangles, 12 = square with plus,
13 = circle with X, 14 = square with upside-down triangle.
Symbols 15 to 18 are solid in the colour specified:
15 = square, 16 = circle, 17 = triangle, 18 = diamond.

The available colours from the default ‘palette’ are:
Col: 0 = none, 1 = black, 2 = red, 3 = green, 4 = dark blue,
5 = turquoise, 6 = pink, 7 = yellow, 8 = grey, 9 = black.

Author(s)

Robert G. Garrett

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

## 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)

rgr

Applied Geochemistry EDA

v1.1.15

GPL-2

Authors