在R中構建向量列表

Question

我想定義一個向量列表。矢量長度爲4和列表的長度爲N.

我想

​​

，但我得到的輸出

[[1]] 
[1] "" 

[[2]] 
[1] "" 

[[3]] 
[1] "" 

但我需要的輸出作爲

[[1]] 
[1] "" "" "" "" 

[[2]] 
[1] "" "" "" "" 

[[3]] 
[1] "" "" "" "" 

這怎麼辦？

感謝

Answer 1

N<-10 
lapply(1:N,function(x)rep(c("","","",""),N)) 

實際上，如果你不重複N次（即所有項目一樣），你可能需要：

lapply(1:N,function(x)c("","","","")) 

Answer 2

這類似於特洛伊的，但不同的不夠，我認爲這是值得發帖：

replicate(N, character(4), s=F) 

隨着N==3：

[[1]] 
[1] "" "" "" "" 

[[2]] 
[1] "" "" "" "" 

[[3]] 
[1] "" "" "" ""