Message-ID: <Pine.GSO.4.05.10006230632460.22016-100000@auk.stats>
Date: 2000-06-23T05:40:51Z
From: Brian Ripley
Subject: Difference between SPlus & R question
In-Reply-To: <4.3.2.7.0.20000622210331.00ab1150@pop4.ibm.net>
On Thu, 22 Jun 2000, Marc Feldesman wrote:
> In S-Plus, I do the following:
>
> v1<-rnorm(50)
> v2<-rnorm(50)
> v3<-"gorilla"
> v4<-cbind(v1, v2)
> v5<-data.frame(v4, v5)
v5<-data.frame(v4, v3)?
>
> v5 is a dataframe with 50 rows and 3 columns. The third column has
> "gorilla" replicated for all 50 rows - the behavior I desire. (It also
> works if I simply do:
>
> v5<-data.frame(v1, v2, v3)
>
> leaving out the cbind() step altogether.
These do not work in S-PLUS 3.4 (`the prototype').
> If I try the same thing in R, it rejects v5, reporting an error that v4 has
> 50 rows while v3 has 1 row.
>
> What is the proper way to achieve the same result in R?
data.frame(v1, v2, v3=rep("gorilla", 50))
will certainly do.
The bug (if it is considered to be one) is at the line
if (length(xi) == 1 && nr%%nrows[[i]] == 0 && is.vector(xi[[1]]))
value[[i]] <- list(rep(xi[[1]], length = nr))
in data.frame. is.vector is too severe a test, failed by a factor.
--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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