rdiagrammer

How to export images of diagrammer in R

I'm trying create image of diagrammer graph but it creates blank files instead. My data frame:

df <- data.frame(col1 = c("Cat", "Dog", "Bird"),
                 col2 = c("Feline", "Canis", "Avis"), 
                 stringsAsFactors = FALSE)

The rest of code:

png("C:\\tmp\\anim.png")
uniquenodes <- unique(c(df$col1, df$col2))
library(DiagrammeR)
nodes <- create_node_df(n=length(uniquenodes), nodes = seq(uniquenodes), type="number", label=uniquenodes)
edges <- create_edge_df(from=match(df$col1, uniquenodes), to=match(df$col2, uniquenodes), rel="related")

g <- create_graph(nodes_df=nodes, edges_df=edges)
render_graph(g)
dev.off()
Solution

  • First install DiagrammeRsvg and rsvg packages. At the end of code add thees lines: 

    export_graph(graph_name,
file_name = "pic.png",
file_type = "png")

    With this you can create not only png image and pdf also.