[R] estimate value from simulations

[arun]

May be this helps:
mat1<- as.matrix(read.table(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
",sep="",header=FALSE)) 
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.
    [[alternative HTML version deleted]]

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