Miscellaneous piecepackr utility functions

get_embedded_font returns which font is actually embedded by cairo_pdf. cleave converts a delimiter separated string into a vector. inch(x) is equivalent to unit(x, "in"). is_color_invisible tells whether the color is transparent (and hence need not be drawn).

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

 to_x(90, 1)
#> [1] 6.123234e-17
 to_y(180, 0.5)
#> [1] 6.123234e-17
 to_t(0, -1)
#> [1] -90
 to_r(0.5, 0)
#> [1] 0.5

 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"

 if (require("grid")) {
     grid.rect(width=inch(1), height=inch(3), gp=gpar(fill="blue"))
 }

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