Hello,
It must be something else. Mandatory row names have nothing to do with a
column header.
I've put the data example in a tab separated file and the strange
behavior was not reproduced.
> read.delim("test.txt", row.names=NULL, fill=TRUE)
start stop Symbol Insert.sequence Clone.End.Pair FISH
1 203048 67173930 ABC8-43024000D23 TI:993812543 TI:993834585 NA
2 255176 87869359 ABC8-43034700N15 TI:995224581 TI:995237913 NA
3 1022033 1060472 ABC27-1253C21 TI:2094436044 TI:2094696079 NA
4 1022033 1061172 ABC23-1388A1 TI:2120730727 TI:2121592459 NA
With read.table, I tried with and without header=TRUE. No "success".
Rui Barradas
Em 04-06-2012 19:30, Bert Gunter escreveu:
Actually, I think it's ?data.frame that he should read.
The salient points are that:
1. All data frames must have unique row names. If not provided, they
are produced. Row numbers **are** row names.
2. The return value of read methods are data frames.
-- Bert
On Mon, Jun 4, 2012 at 11:05 AM, David L Carlson<dcarl...@tamu.edu> wrote:
Try help("read.delim") - always a good strategy before using a function for
the first time:
In it, you will find: "Using row.names = NULL forces row numbering. Missing
or NULL row.names generate row names that are considered to be 'automatic'
(and not preserved by as.matrix)."
----------------------------------------------
David L Carlson
Associate Professor of Anthropology
Texas A&M University
College Station, TX 77843-4352
-----Original Message-----
From: r-help-boun...@r-project.org [mailto:r-help-bounces@r-
project.org] On Behalf Of Ed Siefker
Sent: Monday, June 04, 2012 12:47 PM
To: r-help@r-project.org
Subject: [R] Why do I have a column called row.names?
I'm trying to read in a tab separated table with read.delim().
I don't particularly care what the row names are.
My data file looks like this:
start stop Symbol Insert sequence Clone End Pair FISH
203048 67173930 ABC8-43024000D23 TI:993812543
TI:993834585
255176 87869359 ABC8-43034700N15 TI:995224581
TI:995237913
1022033 1060472 ABC27-1253C21 TI:2094436044 TI:2094696079
1022033 1061172 ABC23-1388A1 TI:2120730727 TI:2121592459
I have to do something with row.names because my first column has
duplicate entries. So I read in the file like this:
BACS<-read.delim("testdata.txt", row.names=NULL, fill=TRUE)
head(BACS)
row.names start stop Symbol Insert.sequence
Clone.End.Pair
1 203048 67173930 ABC8-43024000D23 NA TI:993812543
TI:993834585
2 255176 87869359 ABC8-43034700N15 NA TI:995224581
TI:995237913
3 1022033 1060472 ABC27-1253C21 NA TI:2094436044
TI:2094696079
4 1022033 1061172 ABC23-1388A1 NA TI:2120730727
TI:2121592459
FISH
1 NA
2 NA
3 NA
4 NA
Why is there a column named "row.names"? I've tried a few different
ways of invoking this, but I always get the first column named
row.names,
and the rest of the columns shifted by one.
Obviously I could fix this by using row.names<-, but I'd like to
understand
why this happens. Any insight?
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______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@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.
