[R] Loop with variable index

[Henrique Dallazuanna]

Try this:

x <- rnorm(20)

 sapply(c("sd", "mean"), function(fun)lapply(lapply(lapply(2:20, seq,
from=1), function(.x)x[.x]), fun))

On 30/01/2008, cvandy <cvandy26 at gmail.com> wrote:
>
> I have a list of 20 values.  The first time through a loop I want to find the
> mean and stnd.dev. of the first two values; the second time through the loop
> I want to find the mean and stnd. dev. of  the first 3 values, etc. until
> the last time through the loop I want to find the mean and stnd. dev. of all
> 20 values,  so I end up with 19 means and stnd. deviations.
> How would I construct such a loop?
> Thanks.
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-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O