[R] Re move row.names column in dataframe

[jeharmse]

... the row.names will not interfere with any merging operation ...

Row names do not interfere with merge, but they cause other problems. In the
example, I want to test whether rows have the same entries (in some or all
columns). identical fails because of the row names, and all( == ) can fail
if there are NAs. There are ways around this, but it would be cleaner to be
able to remove row names.

> df <- data.frame(x=c(1,1,NA,NA), y=c(2,2,7,7))
> identical(df[1,],df[2,])
[1] FALSE
> all(df[1,]==df[2,])
[1] TRUE
> all(df[3,]==df[4,])
[1] NA




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