Message-ID: <4F64BB31.7060609@statistik.tu-dortmund.de>
Date: 2012-03-17T16:26:25Z
From: Uwe Ligges
Subject: merge bug fix in R 2.15.0
In-Reply-To: <ec32103ec8b4497fb9028095a195129c.squirrel@webmail.plus.net>
On 15.03.2012 22:48, Matthew Dowle wrote:
>
> Anyone?
>
>> Is it intended that the first suffix can no longer be blank? Seems to be
>> caused by a bug fix to merge in R 2.15.0.
Right, the user is now protected against confusing himself by using
names that were not unique before the merge.
Uwe Ligges
>> $Rdevel --vanilla
>> DF1 = data.frame(a=1:3,b=4:6)
>> DF2 = data.frame(a=1:3,b=7:9)
>> merge(DF1,DF2,by="a",suffixes=c("",".1"))
>> Error in merge.data.frame(DF1, DF2, by = "a", suffixes = c("", ".1")) :
>> there is already a column named ?b?
>>
>> $R --vanilla
>> R version 2.14.2 (2012-02-29)
>>> DF1 = data.frame(a=1:3,b=4:6)
>>> DF2 = data.frame(a=1:3,b=7:9)
>>> merge(DF1,DF2,by="a",suffixes=c("",".1"))
>> a b b.1
>> 1 1 4 7
>> 2 2 5 8
>> 3 3 6 9
>>>
>>
>> Matthew
>>
>
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