基於R重複的數據,如果我有一個2列數據幀:查找指數和字符串一起
meta <- c(1,2,2,3,4,4,4,5)
value <- c("a","b","c","d","e","f","g","h")
df <- data.frame(meta,value)
df
meta value
1 1 a
2 2 b
3 2 c
4 3 d
5 4 e
6 4 f
7 4 g
8 5 h
我怎麼會去反覆用分隔符(如||)「值」組合「元」,使得所得到的數據幀看起來像:
meta value
1 1 a
2 2 b||c
3 3 d
4 4 e||f||g
5 5 h
謝謝!
+1骨料 – A5C1D2H2I1M1N2O1R2T1 2012-07-19 02:58:15