[R] r bug (?) display of data

[Uwe Ligges]

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. 

No 5932 rows, but with the original rownames (with 2 of them missing).

Uwe  Ligges


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.
> 
> Marc
> 
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