R NMF 包：如何提取样本分类？答案

【问题标题】：R NMF package: How to extract sample classifications?R NMF 包：如何提取样本分类？
【发布时间】：2017-04-03 21:50:05
【问题描述】：

在 NMF R 包中，可以使用consensusmap() 来可视化输出。这些图显示了哪些样本属于“共识”轨道中的哪些集群。

我想提取这个样本分类，以便得到这样的数据框：

Sample    Cluster
S1        1
S2        1
S3        2
S4        1
.         .
.         .
S100      2

在 ConsensusClusterPlus 包中，这很容易。您只需拉出 results$consensusClass。我找不到 NMF 包的类似解决方案。我试图查看原始绘图数据，但它太复杂而无法从中提取任何含义。

这里有一个问题的说明：我需要找出哪个“状态”属于哪个“共识”。

【问题讨论】：

标签： r cluster-analysis consensus nmf

【解决方案1】：

走整棵树并数数？

> v <- syntheticNMF(20, 3, 10)

> xx<-consensusmap(x) 

> str(xx)
List of 4
$ Rowv  :  ..--[dendrogram w/ 2 branches and 10 members at h = 1,  midpoint = 5.97, value = 3.4]
  ..  |--[dendrogram w/ 2 branches and 7 members at h = 1, midpoint = 3.69, value = 2.5]
  ..  |  |--[dendrogram w/ 2 branches and 4 members at h = 0, midpoint = 2.12, value = 1.6]
  ..  |  |  |--[dendrogram w/ 2 branches and 3 members at h = 0, midpoint = 1.25, value = 1.2]
  ..  |  |  |  |--[dendrogram w/ 2 branches and 2 members at h = 0, midpoint = 0.5, value = 0.8]
  ..  |  |  |  |  |--leaf "2" ( value.2 = 0.4 )
  ..  |  |  |  |  `--leaf "1" ( value.1 = 0.4 )
  ..  |  |  |  `--leaf "3" ( value.3 = 0.4 )
  ..  |  |  `--leaf "4" ( value.4 = 0.4 )
  ..  |  `--[dendrogram w/ 2 branches and 3 members at h = 0, midpoint = 1.25, value = 0.9]
  ..  |     |--[dendrogram w/ 2 branches and 2 members at h = 0, midpoint = 0.5, value = 0.6]
  ..  |     |  |--leaf "6" ( value.6 = 0.3 )
  ..  |     |  `--leaf "5" ( value.5 = 0.3 )
  ..  |     `--leaf "7" ( value.7 = 0.3 )
  ..  `--[dendrogram w/ 2 branches and 3 members at h = 0, midpoint = 1.25, value = 0.9]
  ..     |--[dendrogram w/ 2 branches and 2 members at h = 0, midpoint = 0.5, value = 0.6]
  ..     |  |--leaf "9" ( value.9 = 0.3 )
  ..     |  `--leaf "8" ( value.8 = 0.3 )
  ..     `--leaf "10" ( value.10 = 0.3 )
  $ rowInd: int [1:10] 2 1 3 4 6 5 7 9 8 10
  $ Colv  :  ..--[dendrogram w/ 2 branches and 10 members at h = 1, midpoint = 3.03, value = 3.4]
  ..  |--[dendrogram w/ 2 branches and 3 members at h = 0, midpoint = 0.75, value = 0.9]
  ..  |  |--leaf "10" ( value.10 = 0.3 )
  ..  |  `--[dendrogram w/ 2 branches and 2 members at h = 0, midpoint = 0.5, value = 0.6]
  ..  |     |--leaf "8" ( value.8 = 0.3 )
  ..  |     `--leaf "9" ( value.9 = 0.3 )
  ..  `--[dendrogram w/ 2 branches and 7 members at h = 1, midpoint = 2.31, value = 2.5]
  ..     |--[dendrogram w/ 2 branches and 3 members at h = 0, midpoint = 0.75, value = 0.9]
  ..     |  |--leaf "7" ( value.7 = 0.3 )
  ..     |  `--[dendrogram w/ 2 branches and 2 members at h = 0, midpoint = 0.5, value = 0.6]
  ..     |     |--leaf "5" ( value.5 = 0.3 )
  ..     |     `--leaf "6" ( value.6 = 0.3 )
  ..     `--[dendrogram w/ 2 branches and 4 members at h = 0, midpoint = 0.875, value = 1.6]
  ..        |--leaf "4" ( value.4 = 0.4 )
  ..        `--[dendrogram w/ 2 branches and 3 members at h = 0, midpoint = 0.75, value = 1.2]
  ..           |--leaf "3" ( value.3 = 0.4 )
  ..           `--[dendrogram w/ 2 branches and 2 members at h = 0, midpoint = 0.5, value = 0.8]
  ..              |--leaf "1" ( value.1 = 0.4 )
  ..              `--leaf "2" ( value.2 = 0.4 )
 $ colInd: int [1:10] 10 8 9 7 5 6 4 3 1 2


> lapply(cut(xx$Rowv,0.5)$lower, function(l) rapply(l, function(i) i))
[[1]]
[1] 2 1 3 4

[[2]]
[1] 6 5 7

[[3]]
[1]  9  8 10

【讨论】：

感谢您的建议。我不太了解这种树状结构，也无法在其中找到“共识”轨迹。在我的数据中，我什至没有看到你在你的数据中看到的“$ Colv”。我有案例/对照数据，我想查看案例或对照是否有过度代表的原型。

【解决方案2】：

NMF::predict(NMFfitX_object, what = "consensus")

如果您有一个 NMF.rank 类的对象，您可以通过以下方式访问包含的 rank = 3 的 NMFfitX 对象：

NMF.rank_object$fit$`3`

【讨论】：