[R] How this addition works?

[Luc Villandre]

bogaso.christofer wrote:
> I have following addition :
>
>  
>
>   
>> 1:2 + 1:10
>>     
>
>  [1]  2  4  4  6  6  8  8 10 10 12
>
>  
>
> I could not understand how R adding those two unequal vector? Any help?
>
>
> 	[[alternative HTML version deleted]]
>
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>   
Hi,

R recycles the shorter vector to yield:

1+1 = 2
2+2 = 4
3+1 = 4
4+2 = 6
5+1 = 6
6+2 = 8

and so on. Is this what you wanted to know?

Cheers, 
-- 
*Luc Villandré*
/Biostatistician
McGill University Health Center -
Montreal Children's Hospital Research Institute/