Message-ID: <loom.20111117T010304-531@post.gmane.org>
Date: 2011-11-17T00:11:46Z
From: JulioSergio
Subject: Named rows in a table (data frame) read from a file
I read a table as follows:
> F1 <- read.table("Rtext3.txt")
> F1
Price Floor Area Rooms Age Cent.heat
a 52.00 111 830 5 6.2 no
b 54.75 128 710 5 7.5 no
c 57.50 101 1000 5 4.2 no
d 57.50 131 690 6 8.8 no
e 59.75 93 900 5 1.9 yes
As it is seen, the rows have a name. However I don't know how to access a
particular element from that name, for instance,
> attach(F1)
> Price
[1] 52.00 54.75 57.50 57.50 59.75
> Price[["a"]]
Error en Price[["a"]] : sub?ndice fuera de los l?mites
> Price$a
Error en Price$a : $ operator is invalid for atomic vectors
> Price['a']
[1] NA
> Price["a"]
[1] NA
If I cannot access particular elements of the frame components by the row names,
is there any use of having the rows named?
Thanks,
Sergio.