[R] combining dataframes into single df with all columns

[Rui Barradas]

Hello,

Sorry, there's a bug in my first reply. Corrected:


fun <- function(x, y){
	df3 <- cbind(x, y[setdiff(names(y), names(x))])
	df3[order(names(df3))]
}
fun(df1, df2)

Rui Barradas

Em 07-02-2013 19:16, Rui Barradas escreveu:
> Hello,
>
> The following function will give what you seem to want.
>
>
> fun <- function(x, y){
>      df3 <- x
>      df3 <- cbind(df3, df2[setdiff(names(y), names(x))])
>      df3[order(names(df3))]
> }
>
> fun(df1, df3)
>
>
>
> Hope this helps,
>
> Rui Barradas
>
> Em 07-02-2013 18:36, Anika Masters escreveu:
>> #I have 2 dataframes df1 & df2.  Each has a subset of all possible
>> column names.
>> #How do I combine the 2 tables so that they contain all column names?
>>
>> data1 <- c('2','3', '6', '8' , '9')
>> data2 <- c('1', '2', '3', '6')
>> df1 <- data.frame(matrix(data=NA, nrow=1, ncol=length(data1),
>> dimnames=list(NULL, paste('col', data1, sep='') ) ) )
>> df2 <- data.frame(matrix(data=data2, nrow=1, ncol=length(data2),
>> dimnames=list(NULL, paste('col', data2, sep='') ) ) )
>>
>> e.g.
>> data1 <- c('2','3', '6', '8' , '9')
>> data2 <- c('1', '2', '3', '6')
>> df1 <- data.frame(matrix(data=NA, nrow=1, ncol=length(data1),
>> dimnames=list(NULL, paste('col', data1, sep='') ) ) )
>> df2 <- data.frame(matrix(data=data2, nrow=1, ncol=length(data2),
>> dimnames=list(NULL, paste('col', data2, sep='') ) ) )
>>
>> #I want:
>> names3 <- sort( unique(c(names(df1), names(df2) ) ) )
>> df3 <- data.frame(matrix(data=c('1','2','3','6','8','9'), nrow=1,
>> ncol=length(names3), dimnames=list(NULL, names3 ) ) )
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.