On Feb 22, 2010, at 8:13 PM, Chunhao wrote:
Dear R users,
I have a question how to use 2 "ifelse" to sort my data. Such as
from 11 to 20 assign to A; 6 to 10 assign to B, and the rest of them
assign
to C
a<-1:20
tt<-ifelse(a>10, "A",no=ifelse( 5< a <=10, "B", "C"))
Two way comparisons are not supported in R (so use "&") and the
negative consequent is not named:
> tt<-ifelse(a>10, "A", ifelse(5< a & a <=10, "B", "C"))
> tt
[1] "C" "C" "C" "C" "C" "B" "B" "B" "B" "B" "A" "A" "A" "A" "A" "A"
"A" "A" "A" "A"
>
--
David.
Many Thanks
Chunhao
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