[R] I bet apply has a solution

LCOG1 jroll at lcog.org
Mon Feb 6 19:34:03 CET 2012


Hi all 
For the data below, I would like to return a logical value indicating
differences in the data.

#Create data
Data..<-data.frame(a=rep(1,10),b=c(rep(1,9),2),c=c(rep(1,8),2,2))

   a b c
1  1 1 1
2  1 1 1
3  1 1 1
4  1 1 1
5  1 1 1
6  1 1 1
7  1 1 1
8  1 1 1
9  1 1 2
10 1 2 2


So what I want is to return logical value telling me if all the values are
the same.  So the result would be a b c DidChange
1  1 1 1     FALSE
2  1 1 1     FALSE
3  1 1 1     FALSE
4  1 1 1     FALSE
5  1 1 1     FALSE
6  1 1 1     FALSE
7  1 1 1     FALSE
8  1 1 1     FALSE
9  1 1 2      TRUE
10 1 2 2      TRUE

I bet apply could handle this elegantly but that family of functions is
still not 100% intuitive to me.  Thoughts.  Thanks everyone

Cheers, 
 Josh


--
View this message in context: http://r.789695.n4.nabble.com/I-bet-apply-has-a-solution-tp4362294p4362294.html
Sent from the R help mailing list archive at Nabble.com.



More information about the R-help mailing list