One possible first step could be:
ifelse(outer(x, x, '>'), 'Big', 'Small')
Patrick Burns
patrick at burns-stat.com
+44 (0)20 8525 0696
http://www.burns-stat.com
(home of "The R Inferno" and "A Guide for the Unwilling S
User")
Chunhao Tu wrote:> Hi R users,
>
> I have a question. How can I use for loop to do pair comparisons. For
> example,
>
>
>> x<-c(1,2,3)
>>
>
>
>> result<-matrix(data=NA, nrow=choose(3,2), ncol=1)
>>
>
>
>> for(i in 1: length(x))
>>
>
> + { result[i,]<-ifelse(x[i] > x[i+1], yes="Big",
no="Small")
>
> + result}
>
>
>> result
>>
>
> [,1]
>
> [1,] "Small"
>
> [2,] "Small"
>
> [3,] NA
>
>
>
> I want to compare (1 vs. 2), (1 vs. 3), (2 vs.3)
>
> I know I miss something but I just can not get it work. Could anyone give
me
> a hint?
>
>
>
> Appreciate,
>
> Chunhao
>
>
> [[alternative HTML version deleted]]
>
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