One possible first step could be:
ifelse(outer(x, x, '>'), 'Big', 'Small')
Patrick Burns
patr...@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
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