grid.DLapply
Modify the Grid Display List
Call a function on each element of the current display list.
- Keywords
- dplot
Usage
grid.DLapply(FUN, ...)
Arguments
- FUN
A function; the first argument to this function is passed each element of the display list.
- …
Further arguments to pass to
FUN
.
Details
This function is insanely dangerous (for the grid display list).
Two token efforts are made to try to avoid ending up with complete garbage on the display list:
The display list is only replaced once all new elements have been generated (so an error during generation does not result in a half-finished display list).
All new elements must be either
NULL
or inherit from the class of the element that they are replacing.
Value
The side effect of these functions is usually to modify the grid display list.
See Also
Grid.
Examples
library(grid)
# NOT RUN {
grid.newpage()
grid.rect(width=.4, height=.4, x=.25, y=.75, gp=gpar(fill="black"), name="r1")
grid.rect(width=.4, height=.4, x=.5, y=.5, gp=gpar(fill="grey"), name="r2")
grid.rect(width=.4, height=.4, x=.75, y=.25, gp=gpar(fill="white"), name="r3")
grid.DLapply(function(x) { if (is.grob(x)) x$gp <- gpar(); x })
grid.refresh()
# }
Community examples
Looks like there are no examples yet.