Nothing
library(grid)
grid.newpage()
# Initiate the boxes that we want to connect
start <- boxGrob("Top", x = .5, y = .8)
end <- boxGrob("Bottom", x = .5, y = .2)
side <- boxPropGrob("Side", "Left", "Right", prop = .3, x = .2, y = .8)
sub_side_left <- boxGrob("Left", x = attr(side, "coords")$left_x, y = .5)
sub_side_right <- boxGrob("Right", x = attr(side, "coords")$right_x, y = .5)
exclude <- boxGrob("Exclude:\n - Too sick\n - Prev. surgery", x = .8, y = .5, just = "left")
# Connect the boxes and print/plot them
connectGrob(start, end, "vertical")
connectGrob(start, side, "horizontal")
connectGrob(side, sub_side_left, "v", "l")
connectGrob(side, sub_side_right, "v", "r")
connectGrob(start, exclude, "L")
# Print the grobs
start
end
side
exclude
sub_side_left
sub_side_right
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