[R] how to calculate summary statistics for each factor

[Andrew Miles]

You could try Summarize in the NCStats package, or aggregate in the  
epicalc package.

Andrew Miles
Department of Sociology
Duke University

On Jul 6, 2010, at 11:53 AM, karena wrote:

>
> I have a dataset like the following:
>
> subject   class     value
> 123        1            10
> 124        1             12
> 125        1            12
> 223        2            23
> 224       2             18
> 225         2            19
> 323        3             21
> 324       3              10
> 325       3               19
> 326       3               20
>
> how to calculate the summary value for each factor?
> thanks
>
> karena
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