Miscellaneous piecepackr utility functions

cleave() converts a delimiter separated string into a vector. inch(x) is equivalent to grid::unit(x, "in"). is_color_invisible() tells whether the color is transparent (and hence need not be drawn).

Usage

is_color_invisible(col)

inch(inches)

cleave(s, sep = ",", float = FALSE, color = FALSE)

file2grob(file, distort = TRUE)

Arguments

col: Color
inches: Number representing number of inches
s: String to convert
sep: Delimiter (defaults to ",")
float: If TRUE cast to numeric
color: if TRUE convert empty strings to "transparent"
file: Filename of image
distort: Logical value of whether one should preserve the aspect ratio or distort to fit the area it is drawn in

Examples

 cleave("0.5,0.2,0.4,0.5", float=TRUE)
#> [1] 0.5 0.2 0.4 0.5
 cleave("black,darkred,#050EAA,,", color=TRUE)
#> [1] "black"       "darkred"     "#050EAA"     "transparent" "transparent"

 is_color_invisible("transparent")
#> [1] TRUE
 is_color_invisible(NA)
#> [1] TRUE
 is_color_invisible("blue")
#> [1] FALSE
 is_color_invisible("#05AE9C")
#> [1] FALSE

 if (requireNamespace("grid", quietly = TRUE)) {
     identical(inch(1), grid::unit(1, "inch"))
 }
#> [1] TRUE