grid.text2: Grid Text with a Background

In Kmisc: Kevin Miscellaneous

Description

This function produces text as does grid.text, but also generates a background rectangle through grid.rect. Helpful for plotting e.g. overlaying correlation statistics on a plot, where you'd like the element to stand out a little more.

Usage

grid.text2(label, x = unit(0.5, "npc"), y = unit(0.5, "npc"),
  just = "centre", hjust = NULL, vjust = NULL, check.overlap = FALSE,
  default.units = "npc", name = NULL, gp = gpar(col = "black", fill =
  "grey92", lineend = "butt", linejoin = "round"), draw = TRUE, vp = NULL,
  widthAdj = unit(0.05, "npc"), heightAdj = unit(0.05, "npc"))

Arguments

label	A character or expression vector. Other objects are coerced by as.graphicsAnnot.
x	A numeric vector or unit object specifying x-values.
y	A numeric vector or unit object specifying y-values.
just	The justification of the text relative to its (x, y) location. If there are two values, the first value specifies horizontal justification and the second value specifies vertical justification. Possible string values are: "left", "right", "centre", "center", "bottom", and "top". For numeric values, 0 means left alignment and 1 means right alignment.
hjust	A numeric vector specifying horizontal justification. If specified, overrides the just setting.
vjust	A numeric vector specifying vertical justification. If specified, overrides the just setting.
check.overlap	A logical value to indicate whether to check for and omit overlapping text.
default.units	A string indicating the default units to use if x or y are only given as numeric vectors.
name	A character identifier.
gp	An object of class gpar, typically the output from a call to the function gpar. This is basically a list of graphical parameter settings.
draw	A logical value indiciating whether graphics output should be produced.
vp	A Grid viewport object (or NULL).
widthAdj	A width adjustment parameter, to help control how much horizontal padding there should be between the text and the background rectangle.
heightAdj	A height adjustment parameter, to help control how much vertical padding there should be between the text and the background rectangle.

See Also

grid.text and grid.rect

Examples

x <- rnorm(10)
y <- rnorm(10)
if (require(lattice)) xyplot( y ~ x,
        panel = function(x, y, ...) {
          panel.xyplot(x, y, ...)
          grid.text2("some text\nwith a nice\nbackground")
          grid.text2( expression( sum(x[i], i==1, n)^2 ), x=0.8, y=0.8 )
          grid.text2( paste("sum of rnorm(10): ", sum(rnorm(10)) ), x=0.2, y=0.2, just="left" )
          grid.text2( "horizontal justifications work too", x=0.95, y=0.35, just="right" )
        })
## will work for multi-panel plots as well

Example output

Loading required package: lattice

Kmisc documentation built on May 29, 2017, 1:43 p.m.