Marc Jekel wrote:
Hi R Fans,
I stumbled across a strange (I think) bug in R 2.9.1. I have read in a
data file with 5934 rows and 9 columns with the commands:
daten = data.frame(read.table("C:/fussball.dat",header=TRUE))
Then I needed a subset of the data file:
newd = daten[daten[,1]!=daten[,2],]
--> two values do not meet the logical specification and are dropped.
The strange thing about it: When I print the newd in the R Console, the
output still shows 5934 rows. When I check the number of rows with
NROW(newd) , I get 5932 as output. When I print newd[5934, ], I get NAs.
When I print newd[5932, ] I get the row that is listed in line 5934 when
I just type in newd. This is totally crazy! Has anyone had the same
problem? Thanks for a post.
You're confusing row names and row numbers. When you printed newd, did
you actually count the number of lines? Thought so...
It isn't any stranger than this:
> data.frame(x=rnorm(6),y=rnorm(6))[-5,]
x y
1 0.9457385 -1.1398275
2 -1.1683732 -0.7269941
3 0.9942821 0.9310146
4 -2.0839580 -0.6261567
6 1.7225233 0.2457897
--
O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B
c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalga...@biostat.ku.dk) FAX: (+45) 35327907
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