[R] Simple one

[jim holtman]

mean(x[x[,'region'] == 'south', 'profit'])

or if dataframe

mean(x$profit[x$region == 'south'])

or for all regions

tapply(x$profit, x$region, mean)

On Fri, Jul 3, 2009 at 6:55 PM, JoK LoQ<jokloq at gmail.com> wrote:
>
> Just a quickly beginner's question.
>
> I wanna find the mean only from the values from a column related to specific
> values from another one. Like, theres a 'region' column, i want the mean of
> the value on 'profit' column only from "south" sells from 'region' column
> --
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-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?