R: Add a Grid Graphical Object

grid.add {grid}

R Documentation

Add a Grid Graphical Object

Description

Add a grob to a gTree or a descendant of a gTree.

Usage

grid.add(gPath, child, strict = FALSE, grep = FALSE,
         global = FALSE, allDevices = FALSE, redraw = TRUE)

addGrob(gTree, child, gPath = NULL, strict = FALSE, grep = FALSE,
        global = FALSE, warn = TRUE)

setChildren(x, children)

Arguments

`gTree, x`	A gTree object.
`gPath`	A gPath object. For `grid.add` this specifies a gTree on the display list. For `addGrob` this specifies a descendant of the specified gTree.
`child`	A grob object.
`children`	A gList object.
`strict`	A boolean indicating whether the gPath must be matched exactly.
`grep`	A boolean indicating whether the `gPath` should be treated as a regular expression. Values are recycled across elements of the `gPath` (e.g., `c(TRUE, FALSE)` means that every odd element of the `gPath` will be treated as a regular expression).
`global`	A boolean indicating whether the function should affect just the first match of the `gPath`, or whether all matches should be affected.
`warn`	A logical to indicate whether failing to find the specified gPath should trigger an error.
`allDevices`	A boolean indicating whether all open devices should be searched for matches, or just the current device. NOT YET IMPLEMENTED.
`redraw`	A logical value to indicate whether to redraw the grob.

Details

addGrob copies the specified grob and returns a modified grob.

grid.add destructively modifies a grob on the display list. If redraw is TRUE it then redraws everything to reflect the change.

setChildren is a basic function for setting all children of a gTree at once (instead of repeated calls to addGrob).

Value

addGrob returns a grob object; grid.add returns NULL.

Author(s)

Paul Murrell