Sorry. It was my typo. Should be three times as it in the example.


Feng

On Mon, Sep 13, 2010 at 11:32 AM, Jim Lemon <jim@bitwrit.com.au> wrote:

> On 09/13/2010 07:19 PM, Feng Li wrote:
>
>> Dear R,
>>
>> I have a vector, say a = c(1,2,4,5,6,8). Can I generate a vector or array
>> (2-by-3-by-3) of this form c(1,2,1,2,1,2,4,5,4,5,4,5,6,8,6,8,6,8), in
>> which
>> every two elements in "a" have been repeated twice?
>>
>> I am to stupid today and could not figure this simple question out...
>>  Many
>> many thanks!
>>
>>  Hi Feng,
> I would take a quick look at the help for "rep" and "c", but I would first
> suggest that you count the number of times that the elements are to be
> repeated. While you have made the definition of the problem reasonably clear
> with your example, there are an awful lot of combinations of "every two
> elements" of a, whether you want to repeat them two or three times.
>
> Jim
>
>


-- 
Feng Li
Department of Statistics
Stockholm University
106 91 Stockholm, Sweden
http://feng.li/

	[[alternative HTML version deleted]]

