I hope this helps.
> x <- data.frame(a=1:5, b=6:10, d=11:15)
> x
a b d
1 1 6 11
2 2 7 12
3 3 8 13
4 4 9 14
5 5 10 15
> # access row with name "a". This does not work.
> x$a
[1] 1 2 3 4 5
> # access column with name "d"
> x$d
[1] 11 12 13 14 15
> x$row.names
NULL
> attributes(x)
$names
[1]
-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Tony Plate
> Sent: Wednesday, September 13, 2006 11:02 AM
> To: Michael Gormley
> Cc: r-help@stat.math.ethz.ch
> Subject: Re: [R] Access Rows in a Data Frame by Row Name
>
> Matrix-style indexing works for both
Matrix-style indexing works for both columns and rows of data frames.
E.g.:
> x <- data.frame(a=1:5, b=6:10, d=11:15)
> x
a b d
1 1 6 11
2 2 7 12
3 3 8 13
4 4 9 14
5 5 10 15
> x[2:4,c(1,3)]
a d
2 2 12
3 3 13
4 4 14
>
Time spend reading the help document "An Introduction to R" wil
I have created a data frame using the read.table command. I want to be able to
access the rows by the row name, or a vector of row names. I know that you can
access columns by using the data.frame.name$col.name. Is there a way to access
row names in a similar manner?
[[alternative HTM
