R help - Nov 2009 - categorization

Hi All,

I have a dataset with a column named "Condition",


Sample   Condition
1            c20
2            c20
3            c10
4            c10
5            c9
6            c9
7            c5
8            c5
9            c20
10          c10

Could you let me know the fastest way to change c20->"AA",
c20->"BB",
c9->"CC", c5->"DD" without using for loop?

Thanks
phoebe

	[[alternative HTML version deleted]]

I don't know if it's "the fastest" way, but you can get there
with

as.character(factor(exData$Condition, levels=c("c20", "c10",
"c9",
"c5"), labels=c("AA", "BB", "CC",
"DD")))

-Ista

On Mon, Nov 9, 2009 at 2:06 PM, phoebe kong <sityeekong at gmail.com>
wrote:
> Hi All,
>
> I have a dataset with a column named "Condition",
>
>
> Sample ? Condition
> 1 ? ? ? ? ? ?c20
> 2 ? ? ? ? ? ?c20
> 3 ? ? ? ? ? ?c10
> 4 ? ? ? ? ? ?c10
> 5 ? ? ? ? ? ?c9
> 6 ? ? ? ? ? ?c9
> 7 ? ? ? ? ? ?c5
> 8 ? ? ? ? ? ?c5
> 9 ? ? ? ? ? ?c20
> 10 ? ? ? ? ?c10
>
> Could you let me know the fastest way to change c20->"AA",
c20->"BB",
> c9->"CC", c5->"DD" without using for loop?
>
> Thanks
> phoebe
>
> ? ? ? ?[[alternative HTML version deleted]]
>
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>


-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org