如何根据列表的长度拆分字符向量

Question

我有这样一个字符向量：

a<-c("tanaman","cabai","banget","hama","sakit","tanaman","koramil","nogosari",
    "melaks","ecek","hama","tanaman","padi","ppl","ds","rambun") 

我想根据列表的长度将字符向量分割成列表，如下所示：

split.char<-list(c("tanaman", "cabai"),c("banget", "hama", 
"penyakit", "tanaman"),c("koramil", "nogosari", "melaks", "pengecekan", "hama",
 "tanaman"  , "padi", "ppl", "ds", "rambun"))  

我试图使用sapply(split.char, length)来定义列表split.char的长度

Length <- sapply(split.char, length)
for(i in Length){
  split(a, Length(i))
 } 

但是我没有得到想要的输出，我经常收到这样的警告消息：

1: In split.default(ok, Length) : data length is not a multiple of split variable
2: In split.default(ok, Length) : data length is not a multiple of split variable
3: In split.default(ok, Length) : data length is not a multiple of split variable

Answer 1

您可以尝试以下几种方法：

split(x=a, f=rep(seq_along(Length), Length))

f必须和x一样长(如果它的长度是x的一个或一个除法器，它将被回收)。

Answer 2

您可以使用relist，它将给'a‘与'split.char’类似的结构(包括length)。

relist(a, skeleton=split.char)
#[[1]]
#[1] "tanaman" "cabai"  

#[[2]]
#[1] "banget"  "hama"    "sakit"   "tanaman"

#[[3]]
#[1] "koramil"  "nogosari" "melaks"   "ecek"     "hama"     "tanaman" 
#[7] "padi"     "ppl"      "ds"       "rambun"