[英]R- merge 3 or more dataframes
I have read data from 3 different files into 3 different dataframes. 我已将数据从3个不同的文件读取到3个不同的数据帧中。 I have tried merge function but doesnot seem to give me the desired output.
我尝试了合并功能,但似乎没有给我想要的输出。 My dataframes are:
我的数据帧是:
df1: DF1:
someName someMOD someID
A T754(P),M691(O),S692(P),S694(P),S739(P),S740(P),S759(P),S762(P) 1
B S495(P) 2
C S162(P),Q159(D) 3
D S45(P),C47(C),S48(P),S26(P) 4
E S18(P) 5
df2: DF2:
someName someMOD someID
C S162(P),Q159(D) 3
D S45(P),C47(C),S48(P),S26(P) 4
F S182(P) 6
E S18(P) 5
Z Q100(P) 9
A T754(P),M691(O),S694(P),S739(P),S740(P) 1
df3: DF3:
someName someMOD someID
A T754(P),M691(O),S692(P),S694(P),S739(P),S740(P),S759(P) 1
B S495(P) 2
D S45(P),C47(C),S48(P),S26(P) 4
E S18(P) 5
F S182(P) 6
L Z182(P) 8
C S162(P),Q159(D) 3
I would like an output like the following which is merged by someID column: 我想要类似someID列合并的以下输出:
Any help is really appreciated.Thanks. 非常感谢您的任何帮助。
Use Reduce
to merge multiple data frames together. 使用
Reduce
将多个数据帧合并在一起。 One annoying thing about Reduce
is that it passes the underlying function exactly 2 arguments, so you have to work around that. Reduce
一件令人讨厌的事情是,它恰好传递了基础函数2个参数,因此您必须解决该问题。
mymerge <- function(x, y)
merge(x, y, by=c("someName", "someID"), all=TRUE))
Reduce(mymerge, list(df1, df2, df3))
library(data.table) 库(data.table)
dt1 <- data.table(df1, key="someName,someID")
dt2 <- data.table(df2, key="someName,someID")
dt3 <- data.table(df3, key="someName,someID")
DT <- dt1[dt2[dt3]]
Have you tried this function : 您是否尝试过此功能:
http://rss.acs.unt.edu/Rdoc/library/gtools/html/smartbind.html http://rss.acs.unt.edu/Rdoc/library/gtools/html/smartbind.html
See this code in the link: 请参阅链接中的以下代码:
out <- smartbind( list(df1, df2, ...))
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