如何访问R中树形图的属性 [英] How to access attributes of a dendrogram in R

问题描述

这是我与创建一个树状图

From a dendrogram which i created with

hc<-hclust(kk)
hcd<-as.dendrogram(hc)

我挑了个支行

k=hcd[[2]][[2]][[2]][[2]][[2]][[2]][[2]][1]

当我只是有显示K，这给：

When i simply have k displayed, this gives:

> k
[[1]]
[[1]][[1]]
[1] 243
attr(,"label")
[1] "NAfrica_002"
attr(,"members")
[1] 1
attr(,"height")
[1] 0
attr(,"leaf")
[1] TRUE

[[1]][[2]]
[1] 257
attr(,"label")
[1] "NAfrica_016"
attr(,"members")
[1] 1
attr(,"height")
[1] 0
attr(,"leaf")
[1] TRUE

attr(,"members")
[1] 2
attr(,"midpoint")
[1] 0.5
attr(,"height")
[1] 37

我

如何访问，例如，中点属性，或者标签的第二个属性？

How can i access, for example, the "midpoint" attribute, or the second of the "label" attributes?

（我希望我在这里使用正确的术语）

(I hope i use the correct terminology here)

我曾尝试之类的东西。

k$midpoint
attr(k,"midpoint")

但都返回'NULL'。

but both returned 'NULL'.

对不起，问题编号为2：我怎么可以在属性之后添加一个标签属性中点

Sorry for question number 2: how could i add a "label" attribute after the attribute "midpoint"?

推荐答案

您 K 仍埋一层太深了。该属性已经设置列表 K 的第一个元素。

Your k is still buried one layer too deep. The attributes have been set on the first element of the list k.

 attributes(k[[1]]) # Display attributes
 attributes(k[[1]])$label # Access attributes
 attributes(k[[1]])$label <- 'new' # Change attribute

另外，你可以使用 ATTR ：

attr(k[[1]],'label') # Display attribute

这篇关于如何访问R中树形图的属性的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！