Re: [R] counts for grouped data

[Spencer Graves]

Have you considered "table"?

spencer graves

Paul Green wrote:
How does one get counts for grouped data
from ungrouped data. For example, how can
I get
        X1  X2  Count
        1     1      1
        1     2      2
        2     1      1
        2     2      1
from

        X1  X2
        A    A
        A    B
        B    B
        A    B
        B    A
Thanks in advance

Paul Green

______________________________________________
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help
______________________________________________
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help