Message-ID: <971536df0902090730j783ac3a8oeb5eeba7f888b9c@mail.gmail.com>
Date: 2009-02-09T15:30:14Z
From: Gabor Grothendieck
Subject: Assigning to a vector while keeping the attributes
In-Reply-To: <e87c15f60902090409p1351a7cfqe56679b56a9d4514@mail.gmail.com>
Try this:
a <- structure(1:3, x = 3)
b <- "attributes<-"(11:15, attributes(a))
dput(b)
On Mon, Feb 9, 2009 at 7:09 AM, Alon Wasserman <alon.was at gmail.com> wrote:
> Hi,
> I would like to know how to assign values to a whole vector while keeping
> its attributes. For example, say I have
> a <- structure(1:3,x=3)
> and I want to change the values to 2:4. If I do, a <- 2:4, the attribute x
> will be lost. I have a workaround for this case, which is to use subset
> assignment
> a[1:3] <- 2:4.
> However, what if I want to also change the length of a? Then this workaround
> doesn't work and also assigning into length(a) drops the attributes. More
> severe workarounds (such as keeping the attributes and then reassigning
> them) work, but if there's a simple solution, I'd be happy to use it.
> Thanks,
> Alon
>
> [[alternative HTML version deleted]]
>
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