过渡的桑基图

Question

我正在尝试从下面的堆栈溢出问题中复制代码和问题

添加一些样本数据

head(links) #Data.frame

Source   Target  Weight 
 Fb        Google  20 
 Fb         Fb      2
 BBC        Google 21
 Microsoft  BBC    16 

head(nodes) 
Fb
BBC
Google
Microsoft

构建 sankey 转换流的代码

sankeyNetwork(Links = links, 
              Nodes = nodes, 
              Source = "Source",
              Target = "Target", 
              Value = "value", 
              fontSize = 12, 
              nodeWidth = 30)

上面提到的堆栈溢出帖子提到源和目标应该在 0 处建立索引。但是，如果我尝试相同的语法，我的源和目标中会出现 NA。什么可能导致此错误？

Answer 1

此代码生成了底部的图。请参阅我的评论以了解您的代码更改的说明。而且，这里有一个很棒的资源：several methods with R to create Sankey (river) plots.

library(networkD3)  

# change to numeric index starting at 0.  I assigned Fb to zero, and so on
links <- data.frame(Source = c(0, 0, 1, 2),
                     Target = c(3, 0, 3, 1),
                     Weight = c(20, 2, 21, 16))

# a nodes dataframe (or dataframe element of a list, as in the help) is needed
nodes <- data.frame(name = c("Fb", "Google", "BBC", "MS"))

sankeyNetwork(Links = links, 
              Nodes = nodes, 
              Source = "Source",
              Target = "Target", 
              Value = "Weight",   # changed from "value"
              fontSize = 12, 
              nodeWidth = 30)

Answer 2

您可以像这样将链接数据框中的源和目标变量转换为节点数据框中的节点索引...

links <- read.table(header = T, text = "
Source   Target  Weight
Fb        Google  20
Fb         Fb      2
BBC        Google 21
Microsoft  BBC    16
")

nodes <- read.table(header = T, text = "
name
Fb
BBC
Google
Microsoft
")

# set the Source and Target values to the index of the node (zero-indexed) in
# the nodes data frame
links$Source <- match(links$Source, nodes$name) - 1
links$Target <- match(links$Target, nodes$name) - 1

print(links)
print(nodes)

# use the name of the column in the links data frame that contains the values
# for the value you pass to the Value parameter (e.g. "Weight" not "value")
library(networkD3)
sankeyNetwork(Links = links, Nodes = nodes, Source = "Source", 
              Target = "Target", Value = "Weight",
              fontSize = 12, nodeWidth = 30)

过渡的桑基图

Sankey Diagram for transitions

r

sankey-diagram

networkd3