# [R] estimate value from simulations

arun smartpink111 at yahoo.com
Thu May 16 08:58:11 CEST 2013

```May be this helps:
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
colnames(mat1)<- NULL
t(sapply(1:3,function(i) colMeans(mat1[seq(i,nrow(mat1),3),])))
#     [,1] [,2] [,3] [,4] [,5] [,6]
#[1,] 3.25 3.25 3.25 3.25 3.25 3.25
#[2,] 2.00 2.00 2.00 2.00 2.00 2.00
#[3,] 3.00 3.00 3.00 3.00 3.00 3.00
A.K.

----- Original Message -----
From: Zilefac Elvis <zilefacelvis at yahoo.com>
To: "r-help at r-project.org" <r-help at r-project.org>
Cc:
Sent: Thursday, May 16, 2013 2:17 AM
Subject: [R] estimate value from simulations

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.
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