Skip to contents

Position of a named point in a LaTeX grob

Source: R/latex-grob.R
grobMark.Rd

Returns the position of a \mark{name} written in the LaTeX, as grid units that can be passed straight to other grid functions, for example to point an arrow at part of a formula.

Usage

grobMark(grob, name)

Arguments

grob

A grob from latex_grob().

name

The name given to \mark{}.

Value

A list with x and y, each a grid::unit(). Rotation (rot) is not taken into account.

See also

latex_grob

Examples

# \donttest{
  g <- latex_grob(r"($a\mark{eq}^2 = b + c^2$)",
                  x = grid::unit(0.5, "npc"),
                  y = grid::unit(0.5, "npc"))
  grid::grid.newpage(); grid::grid.draw(g)
  mk <- grobMark(g, "eq")
  grid::grid.points(mk$x, mk$y, pch = 19,
                    gp = grid::gpar(col = "red"))

# }