我有一个data.frame看起来像这样:分割数据帧的行
df <- data.frame(col1=c("a","b","c","d"), col2=c("1","1;2;3","5","3;2;5;5;3"), col3=c("0","1;1;0","0","0;0;1;1;0"))
# col1 col2 col3
# 1 a 1 0
# 2 b 1;2;3 1;1;0
# 3 c 5 0
# 4 d 3;2;5;5;3 0;0;1;1;0
在换言之,一些行具有与级联值的列“;”。在读取data.frame之前,我不知道哪些列将包含连接的值,但我确实知道对于所有那些具有该值的行,它们将是相同的。我也知道,对于具有连续值的列的行,级联值的数目在所有这些列中是相同的(第2行在col2和col3中均具有3个值,并且第4行在这些列中具有5个值)
I想要创建一个新的data.frame,将这些连接值分割成不同的行。对于这些行,列中没有连接值的值应该由连接值的数量复制。
产生的data.frame将是:
df <- data.frame(col1=c("a","b","b","b","c","d","d","d","d","d"), col2=c("1","1","2","3","5","3","2","5","5","3"), col3=c("0","1","1","0","0","0","0","1","1","0"))
# col1 col2 col3
# 1 a 1 0
# 2 b 1 1
# 3 b 2 1
# 4 b 3 0
# 5 c 5 0
# 6 d 3 0
# 7 d 2 0
# 8 d 5 1
# 9 d 5 1
# 10 d 3 0