Fit labels in nodes in DiagrammeR

Question

I need to plot directed network with 2-way edges and labels on nodes. Node names lengths are sometimes short, sometimes long. Data is dynamically generated so it's a kind of random every time.

Here is my example with data:

library(DiagrammeR)

# create data:
links=data.frame(
    source=c("AAAAAAAAAAAAAAAAAAAAAAAA","AAAAAAAAAAAAAAAAAAAAAAAA", "AAAAAAAAAAAAAAAAAAAAAAAA", "AAAAAAAAAAAAAAAAAAAAAAAA", "AAAAAAAAAAAAAAAAAAAAAAAA","J", "BBBBBBBBB",
             "BBBBBBBBBBBBBBBBBBBBB", "CCCCCCCCCCC", "CCCCCCCCCCC", "D","IIIIIIII"),
    target=c("BBBBBBBBBBBBBBBBBBBBB","BBBBBBBBBBBBBBBBBBBBB", "CCCCCCCCCCC", "D", 
             "J","AAAAAAAAAAAAAAAAAAAAAAAA","E", "F", "G", "H", "IIIIIIII","IIIIIIII")
)


labels <- unique(c(links$source,links$target))

nodes <- data.frame (id = labels, label = labels )

i_graph_1 <-
    DiagrammeR::create_graph() %>% 
    DiagrammeR::add_nodes_from_table(
        table = nodes,
        label_col = label) %>% 
    DiagrammeR::add_edges_from_table(
        table = links,
        from_col = source,
        to_col = target,
        from_to_map = id_external)%>% 
    select_nodes_by_id(nodes = 1:length(labels)) %>% 
    set_node_attrs_ws(
        node_attr = shape,
        value = "rectangle") %>% 
    clear_selection()

gr <- i_graph_1 %>% DiagrammeR::render_graph()

writeLines(
    export_svg(gr), "c:\\temp\\n1.svg"
    )

My result picture:

1. Is it possible to make A<->B, A<->J links bidirectional instead of 2 one-way links?
2. Is it possible to fit labels in nodes and not overlap nodes borders?

UPDATE:

If I use fixedsize = False, result is still not good. Nodes overlap.

i_graph_1 <-
    DiagrammeR::create_graph() %>% 
    DiagrammeR::add_nodes_from_table(
        table = nodes,
        label_col = label) %>% 
    DiagrammeR::add_edges_from_table(
        table = links,
        from_col = source,
        to_col = target,
        from_to_map = id_external)%>% 
    select_nodes_by_id(nodes = 1:length(labels)) %>% 
    set_node_attrs(node_attr = "fixedsize",values = FALSE) %>% 
    set_node_attrs_ws(
        node_attr = shape,
        value = "rectangle") %>% 
    clear_selection()

Answer 1

The key was to use graphviz attributes layout = dot, concentrate = true.

And node_attr = "fixedsize",values = FALSE.

library(DiagrammeR)

# create data:
links=data.frame(
    source=c("AAAAAAAAAAAAAAAAAAAAAAAA","AAAAAAAAAAAAAAAAAAAAAAAA", "AAAAAAAAAAAAAAAAAAAAAAAA", "AAAAAAAAAAAAAAAAAAAAAAAA", "AAAAAAAAAAAAAAAAAAAAAAAA","J", "BBBBBBBBB",
             "BBBBBBBBBBBBBBBBBBBBB", "CCCCCCCCCCC", "CCCCCCCCCCC", "D","IIIIIIII"),
    target=c("BBBBBBBBBBBBBBBBBBBBB","BBBBBBBBBBBBBBBBBBBBB", "CCCCCCCCCCC", "D", 
             "J","AAAAAAAAAAAAAAAAAAAAAAAA","E", "F", "G", "H", "IIIIIIII","IIIIIIII")
)

# Turn it into igraph object


labels <- unique(c(links$source,links$target))

nodes <- data.frame (id = labels, label = labels )

i_graph_1 <-
    DiagrammeR::create_graph() %>% 
    add_global_graph_attrs("layout", "dot", "graph") %>%
    add_global_graph_attrs("concentrate", "true", "graph") %>%
    DiagrammeR::add_nodes_from_table(
        table = nodes,
        label_col = label) %>% 
    DiagrammeR::add_edges_from_table(
        table = links,
        from_col = source,
        to_col = target,
        from_to_map = id_external)%>% 
    select_nodes_by_id(nodes = 1:length(labels)) %>% 
    set_node_attrs(node_attr = "fixedsize",values = FALSE) %>% 
    set_node_attrs_ws(
        node_attr = shape,
        value = "rectangle") %>% 
    clear_selection()


gr <- i_graph_1 %>% DiagrammeR::render_graph( )
gr

Here is the result: