[R] Fw: Help with loops(corrected question)

[Amit Patel]

--- On Fri, 15/5/09, Amit Patel <amitrhelp at yahoo.co.uk> wrote:

> From: Amit Patel <amitrhelp at yahoo.co.uk>
> Subject: Help with loops
> To: r-help at r-project.org
> Date: Friday, 15 May, 2009, 12:17 PM
> Hi
> I am trying to create a loop which averages replicates in
> my data.
> The original data has many rows. and consists of 40 column
> zz[,2:41] plus row headings in zz[,1]
> I am trying to average each set of values (i.e. zz[1,2:3]
> averaged and placed in average_value[1,2] and so on.
> below is my script but it seems to be stuck in an endless
> loop
> Any suggestions??
> 
> for (i in 1:length(zz[,1])) {

> 
> #calculates Meanss
> #Sample A
> average_value[i,2] <- rowMeans(zz[i,2:3])
> average_value[i,3] <- rowMeans(zz[i,4:5])
> average_value[i,4] <- rowMeans(zz[i,6:7])
> average_value[i,5] <- rowMeans(zz[i,8:9])
> average_value[i,6] <- rowMeans(zz[i,10:11])
> 
> #Sample B
> average_value[i,7] <- rowMeans(zz[i,12:13])
> average_value[i,8] <- rowMeans(zz[i,14:15])
> average_value[i,9] <- rowMeans(zz[i,16:17])
> average_value[i,10] <- rowMeans(zz[i,18:19])
> average_value[i,11] <- rowMeans(zz[i,20:21])
> 
> #Sample C
> average_value[i,12] <- rowMeans(zz[i,22:23])
> average_value[i,13] <- rowMeans(zz[i,24:25])
> average_value[i,14] <- rowMeans(zz[i,26:27])
> average_value[i,15] <- rowMeans(zz[i,28:29])
> average_value[i,16] <- rowMeans(zz[i,30:31])
> 
> #Sample D
> average_value[i,17] <- rowMeans(zz[i,32:33])
> average_value[i,18] <- rowMeans(zz[i,34:35])
> average_value[i,19] <- rowMeans(zz[i,36:37])
> average_value[i,20] <- rowMeans(zz[i,38:39])
> average_value[i,21] <- rowMeans(zz[i,40:41])
>   }
> 
> 
> thanks
> 
> 
> 
>