Try also:
t( apply(x, 1, function(x) table( factor(x, levels = 0:2) ) ) )
#       0 1 2
# [1,] 1 2 1
# [2,] 1 3 0
# [3,] 3 0 1
# [4,] 0 2 2

See ?apply, ?table and ?factor for more details, examples and information.

HTH,

Jorge


On Thu, Jul 23, 2009 at 6:44 AM, amor Gandhi <amorigandhi@yahoo.de> wrote:

> Hi everyone,
>
> Is there any counter function in R for the following purpose:
> x <- matrix(c(1,1,0,2,1,0,0,2,0,1,2,1,2,1,0,1),nrow=4)
> As I would like to know how many zeros, ones, and twos in each row of x?
>
> Many thank in advance,
> Amor
>
>
>
>
>
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