[R] estimate value from simulations

[Rui Barradas]

Hello,

Try the following.

mat <- matrix(scan(text = "
  1 1 1 1 1 1
  2 2 2 2 2 2
  3 3 3 3 3 3
  5 5 5 5 5 5
  2 2 2 2 2 2
  3 3 3 3 3 3
  6 6 6 6 6 6
  2 2 2 2 2 2
  3 3 3 3 3 3
  1 1 1 1 1 1
  2 2 2 2 2 2
  3 3 3 3 3 3
"), ncol = 6, byrow = TRUE)

idx <- 1 + (seq_len(nrow(mat)) - 1) %% 3
aggregate(mat, list(idx), mean)


Hope this helps,

Rui Barradas

Em 16-05-2013 07:17, Zilefac Elvis escreveu:
> Hello,
>
> I need your help on this matrix:
>
>
>   1 1 1 1 1 1
>   2 2 2 2 2 2
>   3 3 3 3 3 3
>   5 5 5 5 5 5
>   2 2 2 2 2 2
>   3 3 3 3 3 3
>   6 6 6 6 6 6
>   2 2 2 2 2 2
>   3 3 3 3 3 3
>   1 1 1 1 1 1
>   2 2 2 2 2 2
>   3 3 3 3 3 3
>
> First three rows represent first simulation, next three rows = second simulation etc.
> I would like to estimate the values in row 1 for example by taking  the mean  of rows 1, 4, 7, 10. Do same for all other rows. So the resulting matrix is
> 3-by-6.
>
> Thanks
> Atem.
> 	[[alternative HTML version deleted]]
>
>
>
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