[R] Difference between SPlus & R question
Prof Brian D Ripley
ripley at stats.ox.ac.uk
Fri Jun 23 07:40:51 CEST 2000
On Thu, 22 Jun 2000, Marc Feldesman wrote:
> In S-Plus, I do the following:
> v4<-cbind(v1, v2)
> v5<-data.frame(v4, v5)
> 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[]))
value[[i]] <- list(rep(xi[], 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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