Displaying edge information in Sankey tooltip

问题:

I've am using sankeyNetwork in the networkD3 package to create a visualisation

I would like to assign a name/ID to each edge, so that is appears in the tooltip. Can this be done with sankeyNetwork or any other function in the networkD3 package?

回答1:

This is not technically supported, but you can achieve it like this...

library(networkD3) library(htmlwidgets)  links <- data.frame(   src = c(0, 0, 1, 2),   target = c(2, 3, 2, 4),   value = 1,   name = c("first", "second", "third", "fourth") )  nodes <- data.frame(name = c("one", "two", "three", "four", "five"))  # save the result of sankeyNetwork in an object sn <- networkD3::sankeyNetwork(   Links = links,   Nodes = nodes,   Source = 'src',   Target = 'target',   Value = 'value',   NodeID = 'name' )  # add the names back into the links data because sankeyNetwork strips it out sn$x$links$name <- links$name  # add onRender JavaScript to set the title to the value of 'name' for each link sn <- htmlwidgets::onRender(   sn,   '   function(el, x) {   d3.selectAll(".link").select("title foreignObject body pre")   .text(function(d) { return d.name; });   }   ' )  # display the result sn 

文章来源: Displaying edge information in Sankey tooltip