[R] Count all dataset
Liaw, Andy
andy_liaw at merck.com
Sat Mar 19 01:22:43 CET 2005
Here are two (pretty much the same) ways:
> d
x1 x2 x3
1 D D A
2 B D A
3 C A <NA>
4 D D A
5 A D C
> table(sapply(d, as.character))
A B C D
5 1 2 6
> table(as.matrix(d))
A B C D
5 1 2 6
> sum(is.na(d))
[1] 1
HTH,
Andy
> From: Jan Sabee
>
> Dear all R member,
>
> I have a dataset which looks like:
>
> x1 x2 . . . x250
> A A C
> A C C
> A A A
> A A <NA>
> B B B
> <NA> C B
> ...
> more 2000 rows.
>
> I need count all dataset at the following:
>
> A = sum of A
> B = sum of B
> C = sum of C
> <NA> = sum of <NA>
>
> What function can I use?
> I'm just a beginner in R programming.
>
> Best regards,
> Jan Sabee
>
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