On 2011-02-21 07:17, Francois Rousseu wrote:
I guess I will just get over my laziness and use the rep function instead! But
my goal was more to point out the weird names attribution behaviour.
Maybe not all that weird. Do str(x) between your names<-
assignments:
x <- 1:10
str(x)
names(x)[] <- 'A'
str(x) # note that x now has a 'names' attribute
names(x)[] <- 'A'
str(x) # now the names attribute can be modified
Perhaps not intuitive, but not overly strange.
Peter Ehlers
I'm using named vectors of dates that can be associated to 2 stages (incubation
and rearing in nesting birds) to overlay a vector of observed data and a vector
of theoritical data to see if the stages match on same dates. A data frame
could also be used for this task, but I thought that vectors are a bit simpler
and faster to create.
Francois Rousseu
Date: Mon, 21 Feb 2011 15:58:36 +0100
From: ivan.calan...@uni-hamburg.de
To: r-help@r-project.org
Subject: Re: [R] naming vectors
It is indeed an interesting behavior and I have no idea what you could
do except what you did, though I would use:
names(x)<- rep("A", length(x))
But I don't really understand why you want to give the same name to all
elements? There might be another way around depending on your goal
Ivan
Le 2/21/2011 15:44, Francois Rousseu a écrit :
Hello R users
I was trying to find a less annoying way of naming vectors than:
x<-1:10
names(x)[1:length(x)]<-"A"
So I tried:
x<-1:10
names(x)<-"A" #but this gave only the first element named (as described in the
help files)
and
x<-1:10
names(x)[]<-"A" #but this gave all elements named NA
The curious thing with this last option is that if the same line is ran a second time,
now the vector gets the name "A" for all elements, which is what is desired
names(x)[]<-"A"
I'm guessing the first time the names attribute is created and the second time
values are given to this attribute. But shouldn't we expect the elements to be
all named on the first try with the given value?
Cheers
Francois
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Ivan CALANDRA
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