[R] How to find the non matching vectors among these five, if so how we can find the non matching element of that vectors?

[David Winsemius]

On Sep 6, 2012, at 1:40 AM, Sri krishna Devarayalu Balanagu wrote:

> Hello,
> 
> Say all the below five vectors should have same elements in any situation.
> How to find the non matching vectors among these five, if so how we can find the non matching elements of those vectors?

"non-matching" is not a well-defined mathematical expression. What is the "right answer" to you question?

> Can anyone help?
> 
> a=c(1,2,3)
> b=c(1,2,3,4)
> c=c(1,2,3)
> d=c(1,2,3)
> e=c(1,4,5)
> identical(a,b,c,d,e)

The `identical function only takes two arguments.

For instance, does majority rule if there are multiple duplicated items?

> a=c(1,2,3)
> b=c(1,2,3,4)
> c=c(1,2,3)
> d=c(1,2,3)
> e=c(1,2,3,4)


This will identify the items that are identical to the first duplicated item:

list(a=a,b=b,c=c,d=d,e=e) %in% 
       list(a=a,b=b,c=c,d=d,e=e)[duplicated(  list(a=a,b=b,c=c,d=d,e=e) )][1]
[1]  TRUE FALSE  TRUE  TRUE FALSE
-- 

David Winsemius, MD
Alameda, CA, USA