[R] Minor Bug in Documentation of merge()

Roland Rau roland.rproject at gmail.com
Fri Jul 25 20:13:16 CEST 2008


Dear all,

I would like to point to a minor bug in the documentation of merge().

The documentation (?merge) says
all	logical; all = L is shorthand for all.x = L and all.y = L.

I think the correct description should be
all	logical; all = T is shorthand for all.x = T and all.y = T.

The source file which needs to be fixed is
src/library/base/man/merge.Rd

To be sure that it hasn't been fixed in the meantime, I checked the 
merge.Rd in R-patched_2008-07-24.tar.gz and R-devel_2008-07-24.tar.gz.

Thanks,
Roland

Little code example:

 > set.seed(12345)
 > df.A <- data.frame(Year=2000:2004, myvar.A=rnorm(5))
 > df.B <- data.frame(Year=1998:2002, myvar.B=rnorm(5))
 > merge(df.A, df.B, all=L)
Error in merge.data.frame(df.A, df.B, all = L) : object "L" not found
 > merge(df.A, df.B, all=T)
   Year    myvar.A    myvar.B
1 1998         NA -1.8179560
2 1999         NA  0.6300986
3 2000  0.5855288 -0.2761841
4 2001  0.7094660 -0.2841597
5 2002 -0.1093033 -0.9193220
6 2003 -0.4534972         NA
7 2004  0.6058875         NA
 >



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