Export a UMG as Graphviz DOT code

Generates a directed-graph description in the Graphviz DOT language. Node shape encodes support and inferential role, fill encodes observability, plates become cluster subgraphs (nested clusters for nested plates), and the four edge kinds are rendered with distinct arrowheads and line styles. The output can be rendered by any Graphviz engine or by umg_render_dot().

Usage

umg_to_dot(model, file = NULL, rankdir = c("TB", "LR"), theme = umg_theme())

Arguments

model

An object of class umg.

file

Optional path; when supplied, the DOT code is written there and the path returned invisibly.

rankdir

Graphviz layout direction: "TB" (default) or "LR".

theme

A umg_theme controlling fills.

Value

A character vector of DOT code (invisibly when file is supplied).

Examples

cat(umg_to_dot(umg_factor("F", paste0("y", 1:3))), sep = "\n")
#> digraph UMG {
#>   graph [rankdir=TB, compound=true];
#>   node [fontname="sans"];
#>   subgraph "cluster_person" {
#>     label="i = 1, ..., N"; style=rounded; color="gray30";
#>       "F" [label="F_i", shape=circle, style=filled, fillcolor="white"];
#>       "y1" [label="y1_i", shape=circle, style=filled, fillcolor="gray85"];
#>       "y2" [label="y2_i", shape=circle, style=filled, fillcolor="gray85"];
#>       "y3" [label="y3_i", shape=circle, style=filled, fillcolor="gray85"];
#>   }
#>   "F" -> "y1" [arrowhead=normal, label="1"];
#>   "F" -> "y2" [arrowhead=normal, label="lambda_{2}"];
#>   "F" -> "y3" [arrowhead=normal, label="lambda_{3}"];
#> }