[R] row selection

[David Winsemius]

On Oct 8, 2009, at 4:14 PM, Ashta wrote:

> Hi all,
> I have a matrix  named x with N by  C
> I want to select every 5 th rrow from matrix x
> I used the following code
> n<- nrow(x)
>> for(i in 1: n){
> + b <- a[i+5,]
>> b
> }
> Error: subscript out of bounds

What did you expect when "i" in your loop counter became one greater  
than the number of rows?

>


David Winsemius, MD
Heritage Laboratories
West Hartford, CT