[R] index after rbind

[Spencer Graves]

 > df1 <- data.frame(a=1:2)
 > df2 <- rbind(df1, df1)
 > df2
    a
1  1
2  2
11 1
22 2
 > rownames(df2) <- 1:4

hope this helps. spencer graves

Ann Hess wrote:
> I am using rbind to concatenate two dataframes, but after the rbind I get
> a strange "double" index.
> 
> I am using rbind a number of times to make one large dataset.  Is there a
> way to prevent the "double" index?  Or is there some other way to
> concatenate the data (it looks like merge only works by columns)?
> 
> Here is an example of the "double" index.
> 
> 
>>numbers<-(1:5)
>>letters<-matrix(c("a","b","c","d","e"),5,1)
>>data<-data.frame(letters,numbers)
>>doubledata<-rbind(data,data)
>>doubledata
> 
>    letters numbers
> 1        a       1
> 2        b       2
> 3        c       3
> 4        d       4
> 5        e       5
> 11       a       1
> 22       b       2
> 33       c       3
> 44       d       4
> 55       e       5
> 
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