参数意味着行数不同：2,4,3,5

Question

我正在尝试从我的列表中创建一个数据框：

 > stemmoutput

[[1]]
[1] "tanaman" "cabai"  

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

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

[[4]]
[1] "tani"    "hama"    "sakit"   "tanaman"

[[5]]
[1] "tani"    "hama"    "sakit"   "tanaman"  NA

我在使用data.frame(stemmoutput)时遇到问题，我不断收到此错误消息。

Error in data.frame(c("tanaman", "cabai"), c("banget", "hama", "sakit",  : 
arguments imply differing number of rows: 2, 4, 3, 5

Answer 1

两种合理的方法：

data.frame(word = do.call(c, stemoutput),
           group = rep(1:length(stemoutput), 
                       sapply(stemoutput, length)))

require(reshape2)
melt(stemoutput)

它只是组标签。