Re: [R] type of object of a variable in a data frame

From: Daniel Malter <daniel_at_umd.edu>
Date: Wed, 12 Mar 2008 21:16:57 -0400


is(data$V1)

Have a look at the refcard that you can download from cran.r-project.org or please take a look at one of the many other manuals that are provided there for free (many manuals are also available elsewhere on the internet, so you can google them). Almost all of them answer these basic questions. (Sorry for not giving credit to the one who has written the refcard, but it slipped my mind who.)

Also you can type help.search("put your search term here") or RSiteSearch("put your search term here") to check whether your question has been addressed by others before.

Cheers.



cuncta stricte discussurus

-----Ursprüngliche Nachricht-----
Von: r-help-bounces_at_r-project.org [mailto:r-help-bounces_at_r-project.org] Im Auftrag von Chang Liu
Gesendet: Wednesday, March 12, 2008 7:18 PM An: R Help
Betreff: [R] type of object of a variable in a data frame

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.

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