Message-ID: <971536df0803121623l4e0757f5i11194ce7be31b2ac@mail.gmail.com>
Date: 2008-03-12T23:23:48Z
From: Gabor Grothendieck
Subject: type of object of a variable in a data frame
In-Reply-To: <BAY144-W56113AA5B8B59D44C17F37BE080@phx.gbl>
class(data)
class(data$V1)
str(data)
str(data$V1)
dput(data)
dput(data$V1)
On Wed, Mar 12, 2008 at 7:17 PM, Chang Liu <changisme at hotmail.com> wrote:
>
> Hello!
> I have used read.csv to read in a data frame, and there are a few variables in it, however, when I tried
> is.list(data$V1)
> >FALSE
> In fact, I have tried, they are not vectors either.
>
> I'm wondering:
> 1. What objects are these "lists" of data?
> 2. How could I find out about the type/inheritence of an object in general?
> 3. The reason I want it to be a list or vector, is that I want to fill in some blank values, i can't seem to do things like:
> data$V1[1] = 3
> Is it because these variables are pointers? Is there a better way to do this?
>
> Sorry to cram so many questions in one email!
>
> Karen
> _________________________________________________________________
>
> l. Click here to learn how.
>
> [[alternative HTML version deleted]]
>
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