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).
I did read that, and I still don't understand why I have a column
called row.names.
I used row.names = NULL in order to get numbered row names, which was
successful:
row.names(BACS)
[1] 1 2 3 4
I don't see what this has to do with an extraneous column name. Can you be
more explicit as to what
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,
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
04, 2012 1:16 PM
To: dcarl...@tamu.edu
Subject: Re: [R] Why do I have a column called row.names?
I did read that, and I still don't understand why I have a column
called row.names.
I used row.names = NULL in order to get numbered row names, which was
successful:
row.names(BACS)
[1] 1 2
To jump into the fray, he really needs to read the Details section of
?read.table and arguably, the source code for read.table().
It is not that the resultant data frame has row names, but that an additional
first *column name* called 'row.names' is created, which does not exist in the
source
On 6/4/2012 12:12 PM, Marc Schwartz wrote:
To jump into the fray, he really needs to read the Details section of
?read.table and arguably, the source code for read.table().
It is not that the resultant data frame has row names, but that an
additional first *column name* called 'row.names' is
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