如何在R中使用networkD3不显示SankeyDiagram中的节点或链接中的值

Question

在下面的sankeydiagram示例中，有没有办法在悬停时隐藏图表中显示的“值”-无论是节点还是链接。我基本上是使用sankey图表来显示一个样式化的流程图，我希望这些值根本不会显示给用户

URL <- paste0('https://cdn.rawgit.com/christophergandrud/networkD3/master/JSONdata/energy.json')
energy <- jsonlite::fromJSON(URL)

sankeyNetwork(Links = energy$links, Nodes = energy$nodes, Source = 'source',
              Target = 'target', Value = 'value', NodeID = 'name',
              units = 'TWh', fontSize = 12, nodeWidth = 30)

需要说明的是，在下面的屏幕截图中，我仍然希望看到风电并网，但不希望显示289KWH

​

Answer 1

您可以生成希望在工具提示中显示的任何文本，并将其添加到htmlwidgets对象中，然后使用一些自定义的JavaScript将工具提示文本设置为...

library(jsonlite)
library(networkD3)
library(htmlwidgets)

URL <- paste0('https://cdn.rawgit.com/christophergandrud/networkD3/master/JSONdata/energy.json')
energy <- jsonlite::fromJSON(URL)

# generate the text you want to display
energy$links$name <-
  paste0(energy$nodes$name[energy$links$source + 1],
         " -> ", energy$nodes$name[energy$links$target + 1])

sn <- sankeyNetwork(Links = energy$links, Nodes = energy$nodes, Source = 'source',
              Target = 'target', Value = 'value', NodeID = 'name',
              units = 'TWh', fontSize = 12, nodeWidth = 30)

# add the names back into the links data because sankeyNetwork strips it out
sn$x$links$name <- energy$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

​

​