[R] How to calculate mean of means

[David Winsemius]

On May 26, 2010, at 3:30 PM, ecvetano at uwaterloo.ca wrote:

> I have 3 columns of numbers, and i want to find the mean of each  
> separately, and then the mean of all of the means.
> ive tried:
>
> av3daysB<- mean(mean(avr1), mean(avr2), mean(avr3))
> av3daysB

sapply(list(avr1, avr2, avr3), mean)

mean(c(avr1, avr2, avr3))

>
> but it only gives me the mean of the first column (avr1)
>
> Any suggestions?
> Thanks,
> Emilija
>
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David Winsemius, MD
West Hartford, CT