Help How to use a loop to do pair comparison

One possible first step could be:

ifelse(outer(x, x, '>'), 'Big', 'Small')

Patrick Burns
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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

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