add fork between three nodes, in the y-direction

forky(
  from = NULL,
  to0,
  to1,
  length = NULL,
  pos = NULL,
  label_from = NULL,
  label_to0 = NULL,
  label_to1 = NULL,
  pos_from = NULL,
  pos_to0 = NULL,
  pos_to1 = pos_to0,
  label_from_pos = NULL,
  label_to0_pos = label_from_pos,
  label_to1_pos = label_to0_pos,
  label_from_gap = NULL,
  label_to0_gap = label_from_gap,
  label_to1_gap = label_to0_gap,
  label_from_x = NULL,
  label_to0_x = NULL,
  label_to1_x = NULL,
  label_from_y = NULL,
  label_to0_y = NULL,
  label_to1_y = label_to0_y,
  arr_width = NULL,
  name_from = deparse(substitute(from)),
  name_to0 = deparse(substitute(to0)),
  name_to1 = deparse(substitute(to1)),
  ...
)

Arguments

from	start node
to0	the left end node
to1	the right end node
length	single numeric specifying length, positive will result in a fork from bottom to top, negative from top to bottom. Optional parameter replacing `from`
pos	a decimal between 0 and 1 giving the position between `from`, and the closest of `to0` and `to1` at which to split the fork.
label_from	label to draw on the flow out of `from`
label_to0	label to draw on the flow into `to0`
label_to1	label to draw on the flow into `to1`
pos_from	a decimal between 0 and 1 giving the position to start the flow out of `from`, where 0 = left and 1 = right
pos_to0	a decimal between 0 and 1 giving the position to attach the flow to node `to0`, where 0 = left and 1 = right
pos_to1	a decimal between 0 and 1 giving the position to attach the flow to node `to1`, where 0 = left and 1 = right
label_from_pos	a decimal between 0 and 1 giving the position along the flow out of `from` to draw `label_from`, where 0 = start and 1 = end
label_to0_pos	a decimal between 0 and 1 giving the position along the flow into `to0` to draw `label_to0`, where 0 = start and 1 = end
label_to1_pos	a decimal between 0 and 1 giving the position along the flow into `to1` to draw `label_to1`, where 0 = start and 1 = end
label_from_gap	distance from the flow out of `from` at which to draw `label_from` default = 0.05
label_to0_gap	distance from the flow into `to0` at which to draw `label_to0` default = 0.05
label_to1_gap	distance from the flow into `to1` at which to draw `label_to1` default = 0.05
label_from_x	x co-ordinate of `label_from` position, overrides use of `label_from_pos` and / or `label_from_gap`
label_to0_x	x co-ordinate of `label_to0` position, overrides use of `label_to0_pos` and / or `label_to0_gap`
label_to1_x	x co-ordinate of `label_to1` position, overrides use of `label_to1_pos` and / or `label_to1_gap`
label_from_y	y co-ordinate of `label_from` position, overrides use of `label_from_pos` and / or `label_from_gap`
label_to0_y	y co-ordinate of `label_to0` position, overrides use of `label_to0_pos` and / or `label_to0_gap`
label_to1_y	y co-ordinate of `label_to1` position, overrides use of `label_to1_pos` and / or `label_to1_gap`
arr_width	width of arrow, defaults to same as `flow()`
name_from	internal argument used for informative error messages
name_to0	internal argument used for informative error messages
name_to1	internal argument used for informative error messages
...	additional formatting arguments to `flow()`

Value

returns the start and end points of the flow