DiagrammeR examples

Refs:

library(DiagrammeR)

Some complex eg to show several types of tools:

grViz("
  digraph boxes_and_circles {
  
    # a 'graph' statement
    graph [overlap = true, fontsize = 10]
  
    # several 'node' statements
    node [shape = box,
          fontname = Helvetica]
    A; B; C; D; E; F
  
    node [shape = circle,
          fixedsize = true,
          width = 0.9] // sets as circles
    2; 3; 4; 5; 6; 7

    node [shape = oval,
          fixedsize = true,
          peripheries = 2,
          width = 0.9,
          fontname = 'Courier New',
          style=filled,
          fillcolor = red]
    8

    node [label =<<table border='0' cellborder='1' cellpadding='3' bgcolor='white'>
                    <tr><td bgcolor='black' align='center' colspan='2'><font color='white'>header</font> </td></tr>
                    <tr><td align='left' port='r2'>&#40;2&#41; &#188; &bull;</td>
                        <td bgcolor='grey' align='right'>$</td>
                    </tr>
                  </table>>
          ] // sets as circles
    1

    # several 'edge' statements
    A->1 B->2 B->3 B->4 C->A
    1->D E->A 2->4 1->5 1->F
    E->6 [label='x &#x2208; 3']
    4->6 [label='&#946;&#x2082;=0.85']
    5->7 [penwidth = 5]
    6->7 [style=dotted,label='dotted']
    3->8 [headport = 'e', tailport = 'e', color=blue]
  }
")

The greek letters (Cf. here:

Α Β Γ Δ Ε Ζ Η Θ Ι Κ
Λ Μ Ν Ξ Ο Π Ρ Σ Τ Υ Φ Χ Ψ Ω α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ &sigmaf; σ τ υ φ χ ψ ω &thetasym &upsih; ϖ

Superscripts and Subscripts are the block U+2070 to U+209F

More symbols: http://csbruce.com/software/utf-8.html. To translate, eg, u+2208 is ∈.

This is a eg for a probabilistic graphical model description:

grViz("
  digraph dot {

    graph [compound = true, nodesep = .5, ranksep = .25,
           color = crimson, label='Polynomial Regression Model'
           /*, rankdir='LR', style=filled, fillcolor = blue*/
          ]

    subgraph cluster1 {
      node [shape = diamond, 
            color = black]
      xi

      node [shape = circle,
            style = filled,
            fillcolor = grey] 
      ti
      
      edge [color = black] 
      xi -> ti

      label='N'
    }  
  
    node [shape = circle]
    w

    node [shape = diamond,
          color = black,
          label = '&alpha;']
    alpha

    node [shape = diamond,
          color = black,
          label = '&sigma;&#x00B2;']
    sigma

    edge [color = black]
    alpha -> w
    w -> ti
    sigma -> ti 

  }
  ",
engine = "dot")

where diamonds describe deterministic parameters; shaded circles describe observed values; and boxes describe multiple variables (in this case \(x_1 \ldots x_n\) and \(t_1 \ldots t_n\)).

DiagrammeR examples

May, 2015