[R] elegant way to create a sequence with the 'rep' bulit-in function

[Kathryn Lord]

Dear R users,

I'd like to create a sequence/vector, for example,

1 1 2 2 3 3 1 1 2 2 3 3 1 1 2 2 3 3 1 1 2 2 3 3       4 4 4 4 5 5 5 5 4 4 4
4 5 5 5 5 4 4 4 4 5 5 5 5       6 6 6 7 7 7 8 8 8 9 9 9 6 6 6 7 7 7 8 8 8 9
9 9

So I did like this below.

a <- 4
b <- 3
c <- 2

grp <- c( rep(1:b, each=c, times=a), rep(1:c, each=a, times=b)+b, rep(1:a,
each=b, times=c)+b+c )

I wonder if there is a more elegant way to do this?

Any suggestions? Thank you!

Best wishes

Kathie

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