Question

包文档?FromDataFrameNetwork说明了如何指定方向

这可以是攀爬（从父母到孩子）或下降（从孩子到父母）

Q1。为什么direction = "descen"不起作用：

library(data.tree)
data(acme)

x = ToDataFrameNetwork(acme, direction = "climb")
head(x)
# from                       to
# 1  Acme Inc.               Accounting
# 2  Acme Inc.                 Research
# 3  Acme Inc.                       IT
# 4 Accounting             New Software
# 5 Accounting New Accounting Standards
# 6   Research         New Product Line

x = ToDataFrameNetwork(acme, direction = "descen")
# Error in ToDataFrameNetwork(acme, direction = "descen") : 
#         direction descen unknown. Must be either climb or descen.

#of course i can manually make it from child to parent:
x_the_other_way = x[ , c('to', 'from')]
head(x_the_other_way)
#                       to       from
# 1               Accounting  Acme Inc.
# 2                 Research  Acme Inc.
# 3                       IT  Acme Inc.
# 4             New Software Accounting
# 5 New Accounting Standards Accounting
# 6         New Product Line   Research

Q2。如何在将数据帧网络转换为树时指定方向？

xN <- FromDataFrameNetwork(x, direction = "climb")
# Error in FromDataFrameNetwork(x, direction = "climb") : 
#         unused argument (direction = "climb")

关于Q2的更新：算法将找出方向;用户不需要指定。我想它可能会根据“只有一个根”来判断它

xN = FromDataFrameNetwork(x)
xN_the_other_way = FromDataFrameNetwork(x_the_other_way)

xN
# levelName
# 1  Acme Inc.                       
# 2   ¦--Accounting                  
# 3   ¦   ¦--New Software            
# 4   ¦   °--New Accounting Standards
# 5   ¦--Research                    
# 6   ¦   ¦--New Product Line        
# 7   ¦   °--New Labs                
# 8   °--IT                          
# 9       ¦--Outsource               
# 10      ¦--Go agile                
# 11      °--Switch to R  

xN_the_other_way
# levelName
# 1  Acme Inc.                       
# 2   ¦--Accounting                  
# 3   ¦   ¦--New Software            
# 4   ¦   °--New Accounting Standards
# 5   ¦--Research                    
# 6   ¦   ¦--New Product Line        
# 7   ¦   °--New Labs                
# 8   °--IT                          
# 9       ¦--Outsource               
# 10      ¦--Go agile                
# 11      °--Switch to R

谢谢 -

Answer 1

ToDataFrameNetwork的帮助说：

?ToDataFrameNetwork
direction   when converting to a network, should the edges point from root to children ("climb") or from child to parent ("descend")?

因此，您必须指定climb或descend。

（错误消息中有拼写错误，已在github中修复，尚未在CRAN上修复）。

关于第二个问题：是的，前两列中提供的网络必须是树，即它只能包含一个根。因此，算法很容易找出网络的指定方向。

R data.tree包：如何指定方向（父对子，或其他方式）

1 个答案: