On Mon, 21 May 2007, [EMAIL PROTECTED] wrote:
> Full_Name: Edward McNeil
> Version: 2.5.0
> OS: Windows XP
> Submission from: (NULL) (203.170.234.5)
>
>
> This is a new bug introduced to R2.5.0.
>
> Scenario: If one of the data frames to merge contains two variables that have
> the same name, then the data in first variable (of the same name) is copied to
> the second variable in the resulting merged data frame.
This is probably
o <a data.frame>[i, j] could sometimes select the wrong column
when j is numeric if there are duplicate column names.
from NEWS and hence already fixed in R-patched.
> In R2.4.1, the second variable name is automatically renamed (in the resulting
> data frame) by adding ".1" to the end. R2.5.0 doesn't seem to do this anymore.
This is not reproducible:
A <- data.frame(x=1:3, y=4:6, y=7:9, check.names=FALSE)
B <- data.frame(x=1:3, a=3:1)
merge(A, B)
works correctly in R-patched. You were asked for a reproducible example:
if you have one in current R-patched, please supply it now (using PR#9699
early in your subject line).
--
Brian D. Ripley, [EMAIL PROTECTED]
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 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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