DiagrammeROutput and renderDiagrammeR just produce text output with render_graph

[jebyrnes]

I've been trying to use DiagrammeR to put some graphs into a shiny app. While the Graphviz renderers work, just using native DiagrammeR syntax merely produces raw digraph output. So, the following code:

library(shiny)
library(DiagrammeR)


ui <-  pageWithSidebar(
  headerPanel("Test"),
  sidebarPanel(
  
  ),
  mainPanel(
    DiagrammeROutput("plotMatrix")
  )
)


server <- function(input,output){
  output$plotMatrix <- renderDiagrammeR({
    create_graph() %>%
      add_balanced_tree(
        k = 2, h = 3) %>%
      render_graph()
  })
}


shinyApp(ui, server)

renders no graph, but instead the text

digraph {

graph [layout = "neato",
       outputorder = "edgesfirst",
       bgcolor = "white"]

node [fontname = "Helvetica",
      fontsize = "10",
      shape = "circle",
      fixedsize = "true",
      width = "0.5",
      style = "filled",
      fillcolor = "aliceblue",
      color = "gray70",
      fontcolor = "gray50"]

edge [fontname = "Helvetica",
     fontsize = "8",
     len = "1.5",
     color = "gray80",
     arrowsize = "0.5"]

  "1" [label = "1", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "2" [label = "2", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "3" [label = "3", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "4" [label = "4", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "5" [label = "5", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "6" [label = "6", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "7" [label = "7", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "8" [label = "8", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "9" [label = "9", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "10" [label = "10", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "11" [label = "11", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "12" [label = "12", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "13" [label = "13", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "14" [label = "14", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "15" [label = "15", fillcolor = "#F0F8FF", fontcolor = "#000000"] 
  "1"->"2" 

[rich-iannone]

The renderDiagrammeR() function requires a fix for this (to recognize that a dgr_graph is being used as the expr). However, could you try using the generate_dot() function in place of render_graph()?

[mmalkus]

I ran into the same issue, using generate_dot does not solve it, I get the following error instead:
$ operator is invalid for atomic vectors

UPDATE What does work is just change DiagrammeROutput with grVizOutput and renderDiagrammeR with renderGrViz