[R] Tabulation

[Charles C. Berry]

On Sat, 10 Oct 2009, Dieter Menne wrote:

>
>
>
> Ashta wrote:
>>
>>
>> I have a data set
>> x1  x2 x3
>>  1   2   1
>>  1   2   3
>>  2   1   2
>>  1   2   1
>>  3   1   1
>>
>>  I want to tabulate in the following way.
>>         1   2   3
>>  x1    3   2   1
>>  x2    2   3   0
>>  x3    3   1   1
>>
>> It is just like frequency distribution
>>
>
> See function table.


and colnames() and col()

If your data are in a matrix or data.frame called 'dat'

> table(colnames(dat)[col(dat)], unlist(dat))

      1 2 3
   x1 3 1 1
   x2 2 3 0
   x3 3 1 1
>

HTH,

Chuck

>
> Dieter
>
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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901