data manipulation

I think a list is the wrong structure,
a vector would be better since you can
use 'match':

# transform data structure:
neutralVec <- unlist(neutral_classes)

names(neutralVec) <- 
names(neutral_classes[rep(1:length(neutral_classes), 
sapply(neutral_classes, length))]

# get one or more results with 'match':
names(neutralVec[match(c(50, 20, 10, -4), neutralVec)])

# result:
# [1] "B" "D" "D" NA


Pat

Hi everyone.
I have a list like this:
neutral_classes = list(A = 71:100, B = 46:70, C = 21:45, D = 0:20)
and I'm trying to return the letter of the named vector for with an integer belong. For example, B if I use the value 50.
Any help would be greatly appreciated.
Regards,Phil 		 	   		
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