gtable_filter {gtable}R Documentation

Filter cells by name.

Description

Filter cells by name.

Usage

gtable_filter(x, pattern, fixed = FALSE, trim = TRUE)

Arguments

x

a gtable object

pattern

character string containing a regular expression (or character string for fixed = TRUE) to be matched in the given character vector. Coerced by as.character to a character string if possible. If a character vector of length 2 or more is supplied, the first element is used with a warning. Missing values are allowed except for regexpr and gregexpr.

fixed

logical. If TRUE, pattern is a string to be matched as is. Overrides all conflicting arguments.

trim

if TRUE, gtable_trim will be used to trim off any empty cells.

Examples

library(grid)
gt <- gtable(unit(rep(5, 3), c("cm")), unit(5, "cm"))
rect <- rectGrob(gp = gpar(fill = "black"))
circ <- circleGrob(gp = gpar(fill = "red"))

gt <- gtable_add_grob(gt, rect, 1, 1, name = "rect")
gt <- gtable_add_grob(gt, circ, 1, 3, name = "circ")

plot(gtable_filter(gt, "rect"))
plot(gtable_filter(gt, "rect", trim = FALSE))
plot(gtable_filter(gt, "circ"))
plot(gtable_filter(gt, "circ", trim = FALSE))
[Package gtable version 0.2.0 Index]