seq - Creating a repeating vector sequence in R -

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• r: generate repeating sequence based on vector 1 answer

i need help. how create following vector sequence:

 1 1 1 1 2 2 2 3 3 4  

i tried use (rep) , (seq) still unsucessfull.

try this:

rep(1:4,4:1) 

output:

[1] 1 1 1 1 2 2 2 3 3 4