[R] eval and as.symbol question

[Kaspar Pflugshaupt]

On 18.10.2001 13:46 Uhr, Gary Collins wrote:

> But when I merge these into a dataframe with colnames(df)<-
> c("c1","c2","c3","c4","c5"), so that
>> df
> c1 c2 c3 c4 c5
> 1  1  1 NA NA NA
> 2  2  2 NA NA NA
> 3  3  3 NA NA NA
> 4 NA NA NA  1  1
> 5  2  2  2  2  2
> 6  2  2  2  2  2
> 7 NA  3  3 NA  2
> 
> and try the next "logical" step from above....
> 

You might try something like this instead:

apply(df, 2, function(x) sum(is.na(x)))



Hope this helps

Kaspar


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Kaspar Pflugshaupt
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