[R] Calculating Summaries for each level of a Categorical variable

RaoulD raoul.t.dsouza at gmail.com
Sun Jun 27 06:46:40 CEST 2010


Hi Corey,

Thanks so much for this. However, I get this error for tapply - "Error in
tapply(RT, RT$R, fun=WA): 
  arguments must have same length". Any idea how to get around this?

Thanks again,
Raoul
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