使用ctree显示每个节点的体积，以R表示 [英] show volume in each node using ctree , plot in R

问题描述

任何人都可以告诉我如何在每个节点中增加音量，而不是最后一个节点音量

can any one please show me how to add volume in each of the nodes , instead of the final node volume

t <- ctree(is_return ~ a + b + c)    
plot(t, type="simple")

我的树看起来像

如何修改该图，使其在每个圆节点上显示N =，而不仅仅是黑色或最后一个节点.

how can I modified that plot where it would show N= on every circle nodes , not only the black or the final node.

谢谢

推荐答案

该想法是指定用于绘制内部节点的面板功能.

The idea is to specify a panel functions for plotting inner nodes.

我生成一些数据，然后生成树

I generate some data, and the tree

lls <- data.frame(N = gl(3, 50, labels = c("A", "B", "C")), 
                  a = rnorm(150) + rep(c(1, 0,150)),
                  b = runif(150))
pond= sample(1:5,150,replace=TRUE)
tt <- ctree(formula=N~a+b, data=lls,weights = pond)

自定义内部绘图功能.我画一个圆圈，写一些权重.

The custom inner plot function. I draw a circle where i write the some of weights.

innerWeights <- function(node){
  grid.circle(gp = gpar(fill = "White", col = 1))
  mainlab <- paste( node$psplit$variableName, "\n(n = ")
  mainlab <- paste(mainlab, sum(node$weights),")" , sep = "")
  grid.text(mainlab,gp = gpar(col='red'))
}

我画了树

plot(tt, type='simple', inner_panel = innerWeights)

PS:结果取决于随机生成的数据，因此您可能不会获得相同的图.

PS: the results depends on a random generated data, so you will not probably get the same plot.

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