[R] biding rows while merging at the same time

Erik Iverson eriki at ccbr.umn.edu
Wed Nov 3 22:40:58 CET 2010


Just

merge(df1, df2, all = TRUE)

does it, yes?

Dimitri Liakhovitski wrote:
> Hello!
> 
> I have 2 data frames like this (well, actually, I have 200 of them):
> 
> df1<-data.frame(location=c("loc 1","loc 2","loc
> 3"),date=c("1/1/2010","1/1/2010","1/1/2010"), a=1:3,b=11:13,c=111:113)
> df2<-data.frame(location=c("loc 1","loc 2","loc
> 3"),date=c("2/1/2010","2/1/2010","2/1/2010"),
> a=4:6,c=114:116,d=c(1,11,111))
> (df1)
> (df2)
> 
> I am trying to just rbind them, which is impossible, because not every
> column is present in every data frame.
> I can't merge them -
> merge(df1,df2,by.x="location",by.y="location",all.x=T,all.y=T) -
> because it kinda cbinds them.
> What I need is something that looks like this:
> 
> location   date    a  b      c      d
> loc 1   1/1/2010  1  11   111   NA
> loc 2   1/1/2010  2  12   112   NA
> loc 3   1/1/2010  3  13   113   NA
> loc 1   2/1/2010  3  NA  114  1
> loc 2   2/1/2010  5  NA  115  11
> loc 3   2/1/2010  6  NA  116   111
> 
> Thanks a lot for your suggestions!
>



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