rvisnetwork

How to change colour of selected node or edge when using the visNetwork package in R?

A similar question has been asked here, but I cant seem to adapt it to my code. What I'm trying to do is change the colour of the nodes and edges using the visNetwork package in R. I want to apply this colour change when either

1: the mouse is hovering over a node/edge and

2: when a node or edge is clicked on.

Below is some code to create a very simple network.

# Load required packages
library(visNetwork)

# Create example data
nodes <- data.frame(id = 1:3, label = c("Node 1", "Node 2", "Node 3"))
edges <- data.frame(from = c(1, 1, 2), to = c(2, 3, 3), value = c(10, 20, 30))

# Create visNetwork object with customized node and edge colors
visNetwork(nodes, edges) |>  
  visNodes(color = list(background = "red", 
           border = "black")) |> 
  visEdges(color = "blue", smooth = FALSE)|>
  visOptions(highlightNearest = list(enabled = T, hover = T),
                                    nodesIdSelection = T)

At the moment, I have the nodes coloured red and when hovering over/clicking the node with the mouse, it automatically changes colour to a blue. I would like to control that colour somehow. Also, when selecting an edge, it just seems to make the edge thicker but keeps the same colour. I want to try and change the edge colour when selecting it.

I have tried playing with the visOptions, visEdges, and visNodes arguments, but I just can't seem to figure it out.

Solution

  • From ?visEdges (or ?visNodes), argument color:

    Named list or String. Default to named list. Color information of the edge in every situation. Can be 'rgba(120,32,14,1)', '#97C2FC' (hexa notation on 7 char without transparency) or 'red'.

    • "color" : String. Default to '#848484. The color of the edge when it is not selected or hovered over (assuming hover is enabled in the interaction module).
    • "highlight " : String. Default to '#848484'. The color the edge when it is selected.
    • "hover" : String. Default to '#848484'. The color the edge when the mouse hovers over it (assuming hover is enabled in the interaction module).
    • ...
    # Load required packages
library(visNetwork)

# Create example data
nodes <- data.frame(id = 1:3, label = c("Node 1", "Node 2", "Node 3"))
edges <- data.frame(from = c(1, 1, 2), to = c(2, 3, 3), value = c(10, 20, 30))

# Create visNetwork object with customized node and edge colors
visNetwork(nodes, edges) |>  
  visNodes(color = list(background = "red", border = "black", highlight = "yellow",
                        hover = "yellow")) |> 
  visEdges(color = list(color = "blue", highlight = "yellow", 
                        hover = "yellow"), smooth = FALSE)|>
  visOptions(highlightNearest = list(enabled = T, hover = T),
             nodesIdSelection = T)