Question

这是来自Converting ctree output into JSON Format (for D3 tree layout)

的后续问题

我有以下代码，使用System/libraries/Session/Session.php.生成（来自ctree，请参阅产生它的代码），我的目的是创建一个转换以下Json输出的递归函数：

Party

进入以下内容：

    {"nodeID":[1],"left":
          {"nodeID":[2],"weights":[50],"prediction":[1,0,0]},
          "right":
          {"nodeID":[3],"left":{
          "nodeID":[4],"left":
          {"nodeID":[5],"weights":[46],"prediction":[0,0.9783,0.0217]},"right":
          {"nodeID":[6],"weights":[8],"prediction":[0,0.5,0.5]}},"right":
          {"nodeID":[7],"weights":[46],"prediction":[0,0.0217,0.9783]}}}

让我创建以下精彩的{ "name": "1", "children": [ { "name": "3","children": [ { "name": "4","children":[ {"name":"5 weights:[46] prediction:[0,0.9783,0.0217]"}, {"name":"6 weights:[8] prediction[0,0.5,0.5]}" ] } {{"nodeID":"7 weights:[46]prediction[0,0.0217,0.9783]"} } ] }, { "name": "2 weights:[50] prediction[1,0,0]", } ] }输出：

背景：

我有以下代码创建一个Json输出，但不退出我需要的代码：

d3.js

我试图改变它，但似乎我有一些挑战，我只是无法解决：为了得到一个通用的解决方案，我需要一些递归函数，它创建一个嵌套的Json对象，每当有一个分裂（子）时，ctree也有不同的导航约定来自d3.js导航约定，其中ctree导航累计使用“右”和“左”，其中d3.js需要“儿童”导航“

任何有关这方面的帮助都会很精彩，我会坚持这一步退出一段时间：）

Answer 1

嗨，我刚刚看到帖子后开始进行R编码，这是我到目前为止实现的。

library(party)
irisct <- ctree(Species ~ .,data = iris)
plot(irisct)

get_ctree_parts <- function(x, ...)
{
  UseMethod("get_ctree_parts")
}

get_ctree_parts.BinaryTree <- function(x, ...)
{
  get_ctree_parts(attr(x, "tree"))
}

get_ctree_parts.SplittingNode <- function(x, ...)
{
  with(
    x,
    list(
      name       = toString(nodeID),
      children   = list(get_ctree_parts(x$left),get_ctree_parts(x$right))

    )
  )
}

get_ctree_parts.TerminalNode <- function(x, ...)
{
  with(
    x,
    list(
      name     = paste(nodeID,"weights",sum(weights),"prediaction",toString(paste("[",toString(prediction),"]",sep=" ")),sep = " ")

    )
  )
}

toJSON(get_ctree_parts(irisct))

Json输出：

{"name":["1"],"children":[
    {"name":["2 weights 50 prediaction [ 1, 0, 0 ]"]},
        {"name":["3"],"children":[
            {"name":["4"],"children":[
                {"name":["5 weights 46 prediaction [ 0, 0.978260869565217, 0.0217391304347826 ]"]},
                {"name":["6 weights 8 prediaction [ 0, 0.5, 0.5 ]"]}]
            },
            {"name":["7 weights 46 prediaction [ 0, 0.0217391304347826, 0.978260869565217 ]"]
            }]
        }]
}

如果您有任何问题，请尽我所能。

将Json R对象转换为适合d3.js树布局的格式

1 个答案: