write_tikz: Export the staged tree or CEG graph to tikz

Description

Generate tikz code to draw the staged tree or CEG graph.

Usage

write_tikz(
  x,
  layout = NULL,
  file = "",
  col = NULL,
  ignore = x$name_unobserved,
  node_label = function(node) {
     ifelse(is.na(node$stage), "", node$stage)
 },
  edge_label = function(edge) {
     ifelse(is.na(edge$label), "", edge$label)
 },
  edge_label_options = function(edge) {
     return("sloped")
 },
  scale = 10,
  normalize_layout = TRUE,
  node_shape = "circle",
  node_inner_sep = "1mm",
  node_minimum_size = "0.3cm",
  node_draw_color = "black",
  node_thickness = "very thick",
  node_text_color = "black"
)
# S3 method for sevt
write_tikz(
  x,
  layout = NULL,
  file = "",
  col = NULL,
  ignore = x$name_unobserved,
  node_label = function(node) {
     ifelse(is.na(node$stage), "", node$stage)
 },
  edge_label = function(edge) {
     ifelse(is.na(edge$label), "", edge$label)
 },
  edge_label_options = function(edge) {
     return("sloped")
 },
  scale = 10,
  normalize_layout = TRUE,
  node_shape = "circle",
  node_inner_sep = "1mm",
  node_minimum_size = "0.3cm",
  node_draw_color = "black",
  node_thickness = "very thick",
  node_text_color = "black"
)

Arguments

x: an object of class sevt or ceg.
layout: the layout of the graph, given as matrix with two columns and as many rows as nodes in the staged tree. By default, a modified sugiyama layout is used. The layout matrix can be obtained with igraph layout functions.
file: A connection or a character string naming the file to print to. Passed to cat.
col: color specifications for the stages of the staged even tree. Same as plot.sevt and make_stages_col.
ignore: vector of stages which will be ignored and not plotted, by default the name of the unobserved stages stored in x$name_unobserved.
node_label: a function that produces nodes labels.
edge_label: a function that produces edge labels.
edge_label_options: a function that produces edge label options.
scale: for the tikzfigure.
normalize_layout: a logical value. If TRUE layout positions are scaled to the [0,1] interval.
node_shape: the shape to be used for nodes.
node_inner_sep: the inner sep parameter.
node_minimum_size: the minimum size parameter for the nodes.
node_draw_color: the color for line drawing the nodes.
node_thickness: the thickness of the lines.
node_text_color: the color for label in nodes.

Details

This function can be used to create a working tikz code that compile to a graph similar to the one obtained by plot.sevt(x, ...) or plot.ceg(x, ...).

References

Code partially inspired by the code in Exporting graphs to LaTeX, using igraph and TikZ http://igraph.wikidot.com/r-recipes#toc2