
the variable you want to analyze (first argument to tapply) and the  
variable you want to analyze by (the factor, second arg to tapply)  
both must have the same number of rows, that' s how I read this.
CS

Corey Sparks
Assistant Professor
Department of Demography and Organization Studies
College of Public Policy
501 West Durango Blvd
Monterrey Building 2.270C
San Antonio, TX 78207
corey.sparks 'at' utsa.edu
210 458 3166

On Jun 26, 2010, at 11:46 PM, RaoulD [via R] wrote:

> 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
>
> View message @ http://r.789695.n4.nabble.com/Calculating-Summaries-for-each-level-of-a-Categorical-variable-tp2269349p2269815.html
> To unsubscribe from Re: Calculating Summaries for each level of a  
> Categorical variable, click here.
>




-----
Corey Sparks, PhD
Assistant Professor
Department of Demography and Organization Studies
University of Texas at San Antonio
501 West Durango Blvd
Monterey Building 2.270C
San Antonio, TX 78207
210-458-3166
corey.sparks 'at' utsa.edu
https://rowdyspace.utsa.edu/users/ozd504/www/index.htm
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