Gabor Grothendieck schrieb:
What version of R are you using?
"R version 2.8.1 (2008-12-22)" (running Windows)
I get this:
do.call(cbind, mylist)
df1.pos df1.data df2.pos df2.data df3.pos df3.data
1 A 2 A 6 A 9
2 B 6 B 2 B 3
3 C 3 C 9 C 6
4 D 1 D 7 D 2
5 E 9 E 5 E 1
R.version.string
[1] "R version 2.8.1 Patched (2008-12-26 r47350)"
In which case
ALL <- do.call(cbind, mylist)
ALL <- ALL[regexpr("data", names(ALL)) > 0]
names(ALL) <- sub("[.].*", "", names(ALL))
ALL
df1 df2 df3
1 2 6 9
2 6 2 3
3 3 9 6
4 1 7 2
5 9 5 1
On Wed, Jan 21, 2009 at 3:19 AM, Antje <niederlein-rs...@yahoo.de> wrote:
Hi there,
I have a list of dataframes (generated by reading multiple files) and all
dataframes are comparable in dimension and column names. They also have a
common column, which, I'd like to use for merging. To give a simple example
of what I have:
df1 <- data.frame(c(LETTERS[1:5]), c(2,6,3,1,9))
names(df1) <- c("pos", "data")
df3 <- df2 <- df1
df2$data <- c(6,2,9,7,5)
df3$data <- c(9,3,6,2,1)
mylist <- list(df1,df2,df3)
names(mylist) <- c("df1","df2","df3")
mylist
$df1
pos data
1 A 2
2 B 6
3 C 3
4 D 1
5 E 9
$df2
pos data
1 A 6
2 B 2
3 C 9
4 D 7
5 E 5
$df3
pos data
1 A 9
2 B 3
3 C 6
4 D 2
5 E 1
If I use do.call("cbind"), I'll end up with something like this
pos data pos data pos data
1 A 2 A 6 A 9
2 B 6 B 2 B 3
3 C 3 C 9 C 6
4 D 1 D 7 D 2
5 E 9 E 5 E 1
but now, I don't know anymore which data comes from which dataframe... and I
have the column "pos" multiple times...
Instead I'd like to have it like this:
pos df1 df2 df3
1 A 2 6 9
2 B 6 2 3
3 C 3 9 6
4 D 1 7 2
5 E 9 5 1
How, can I realize it? (The list, I'm working with has not just 3 data
frames like given in my example, so I need to automize it)
Antje
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