Directed DAG edges

geom_dag_edges_link(mapping = NULL, data = NULL,
  arrow = grid::arrow(length = grid::unit(5, "pt"), type = "closed"),
  position = "identity", na.rm = TRUE, show.legend = NA,
  inherit.aes = TRUE, ...)

geom_dag_edges_arc(mapping = NULL, data = NULL, curvature = 0.5,
  arrow = grid::arrow(length = grid::unit(5, "pt"), type = "closed"),
  position = "identity", na.rm = TRUE, show.legend = NA,
  inherit.aes = TRUE, fold = FALSE, n = 100, lineend = "butt",
  linejoin = "round", linemitre = 1, label_colour = "black",
  label_alpha = 1, label_parse = FALSE, check_overlap = FALSE,
  angle_calc = "rot", force_flip = TRUE, label_dodge = NULL,
  label_push = NULL, ...)

geom_dag_edges_diagonal(mapping = NULL, data = NULL,
  position = "identity", arrow = grid::arrow(length = grid::unit(5,
  "pt"), type = "closed"), na.rm = TRUE, show.legend = NA,
  inherit.aes = TRUE, n = 100, lineend = "butt",
  linejoin = "round", linemitre = 1, label_colour = "black",
  label_alpha = 1, label_parse = FALSE, check_overlap = FALSE,
  angle_calc = "rot", force_flip = TRUE, label_dodge = NULL,
  label_push = NULL, ...)

geom_dag_edges_fan(mapping = NULL, data = NULL,
  position = "identity", arrow = grid::arrow(length = grid::unit(5,
  "pt"), type = "closed"), na.rm = TRUE, show.legend = NA,
  inherit.aes = TRUE, spread = 0.7, n = 100, lineend = "butt",
  linejoin = "round", linemitre = 1, label_colour = "black",
  label_alpha = 1, label_parse = FALSE, check_overlap = FALSE,
  angle_calc = "rot", force_flip = TRUE, label_dodge = NULL,
  label_push = NULL, ...)

Arguments

mapping

Set of aesthetic mappings created by aes() or aes_(). If specified and inherit.aes = TRUE (the default), it is combined with the default mapping at the top level of the plot. You must supply mapping if there is no plot mapping.

data

The data to be displayed in this layer. There are three options: If NULL, the default, the data is inherited from the plot data as specified in the call to ggplot(). A data.frame, or other object, will override the plot data. All objects will be fortified to produce a data frame. See fortify() for which variables will be created. A function will be called with a single argument, the plot data. The return value must be a data.frame., and will be used as the layer data.

arrow

specification for arrow heads, as created by arrow()

position

Position adjustment, either as a string, or the result of a call to a position adjustment function.

na.rm

If FALSE (the default), removes missing values with a warning. If TRUE silently removes missing values

show.legend

logical. Should this layer be included in the legends? NA, the default, includes if any aesthetics are mapped. FALSE never includes, and TRUE always includes. It can also be a named logical vector to finely select the aesthetics to display.

inherit.aes

If FALSE, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e.g. borders().

...

Other arguments passed to ggraph::geom_edge_*()

curvature

The bend of the curve. 1 approximates a halfcircle while 0 will give a straight line. Negative number will change the direction of the curve. Only used if layout circular = FALSE.

fold

Logical. Should arcs appear on the same side of the nodes despite different directions. Default to FALSE.

n

The number of points to create along the path.

lineend

Line end style (round, butt, square).

linejoin

Line join style (round, mitre, bevel).

linemitre

Line mitre limit (number greater than 1).

label_colour

The colour of the edge label. If NA it will use the colour of the edge.

label_alpha

The opacity of the edge label. If NA it will use the opacity of the edge.

label_parse

If TRUE, the labels will be parsed into expressions and displayed as described in grDevices::plotmath().

check_overlap

If TRUE, text that overlaps previous text in the same layer will not be plotted.

angle_calc

Either 'none', 'along', or 'across'. If 'none' the label will use the angle aesthetic of the geom. If 'along' The label will be written along the edge direction. If 'across' the label will be written across the edge direction.

force_flip

Logical. If angle_calc is either 'along' or 'across' should the label be flipped if it is on it's head. Default to TRUE.

label_dodge

A grid::unit() giving a fixed vertical shift to add to the label in case of angle_calc is either 'along' or 'across'

label_push

A grid::unit() giving a fixed horizontal shift to add to the label in case of angle_calc is either 'along' or 'across'

spread

Modify the width of the fans spread > 1 will create wider fans while the reverse will make them more narrow.

Aesthetics

geom_dag_edges_link, geom_dag_edges_arc, geom_dag_edges_diagonal, and geom_dag_edges_fan understand the following aesthetics. Bold aesthetics are required.

  • x

  • y

  • xend

  • yend

  • edge_colour

  • edge_width

  • edge_linetype

  • edge_alpha

  • start_cap

  • end_cap

  • label

  • label_pos

  • label_size

  • angle

  • hjust

  • vjust

  • family

  • fontface

  • lineheight

geom_dag_edges_arc and geom_dag_edges_diagonal also require circular, but this is automatically set.

geom_dag_edges_fan requires to and from, but these are also automatically set.

Examples

p <- dagify(y ~ x + z2 + w2 + w1, x ~ z1 + w1, z1 ~ w1 + v, z2 ~ w2 + v, L ~ w1 + w2) %>% ggplot(aes(x = x, y = y, xend = xend, yend = yend)) + geom_dag_node() + geom_dag_text() + theme_dag() p + geom_dag_edges_link()
p + geom_dag_edges_arc()
p + geom_dag_edges_diagonal()