小编tak*_*asy的帖子

我想按数据框中定义的特定组对树状图的分​​支进行着色。

library(reshape2)
library(factoextra) # clustering visualization 
library(dendextend)
#iris dataset
#defining colors
colori = rep(NA, length=length(iris$Species))
colori[which(iris$Species=="setosa")] = "red"
colori[which(iris$Species=="versicolor")] = "blue"
colori[which(iris$Species=="virginica")] = "yellow"

iris_dist <- dist(iris[ ,1:4],)
hc1_iris <- hclust(iris_dist,method = "average")
col_dendro_iris <- color_branches(as.dendrogram(hc1_iris),groupLabels =T, clusters = iris$Species,col=colori)

col_dendro_iris_plot <- plot(col_dendro_iris,main = "Dendrogram of normalized BLS\ncolored by manmade groups",labels = NULL,xlab = NULL)

这只会把树枝染成红色。为什么？我该如何解决这个问题

编辑：当我这样做时它有效

pca_iris <- PCA(iris[ ,1:4])
colori = rep(NA, length=length(iris$Species))
colori[which(iris$Species=="versicolor")] = "red"
colori[which(iris$Species=="virginica")] = "yellow"
colori[which(iris$Species=="setosa")] = "blue"
# species <- iris$Species
iris_gr <- …