addlogo-methods
From pixmap v0.4-11
by Friedrich Leisch
Methods for Adding a Pixmap Logo to a Plot
This method allows the addition of a re-scaled pixmap to an existing
plot, possibly as a logo, optionally preserving aspect. It may be
used interactively with locator
, and is positioned in the
coordinate system of the plot region. Since the logo is displayed
using image
, it does not yet seem possible to use the function
outside this region.
- Keywords
- methods
Usage
addlogo(x, ...) "addlogo"(x, px, py, asp = NULL)
Arguments
- x
- an object of class
pixmap
- px
- a vector of two x coordinates, or a list with two named
elements x and y, such as that returned by
locator
. - py
- if px is not a list, a vector of two y coordinates
- asp
- if omitted or NULL (default), output respects both y coordinates, if a number greater than zero, aspect is preserved in proportion to the difference between x coordinates, multiplied by asp, and only the first y coordinate is respected.
- ...
- potentially further arguments passed to and from methods.
Value
Examples
x <- read.pnm(system.file("pictures/logo.ppm", package="pixmap")[1])
plot(x)
for (i in 1:7)
addlogo(x, px=c(0, (101/77)*11), py=c((i-1)*11, i*11), asp=1)
Community examples
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