Creating a sequence with repeating numbers

I want to create a sequence as follows: The sequence should have a single column with each number repeated twice (1,1,2,2,3,3,4,4,....430,430)

Answer 1

[Stephan]

b = repelem(1:430,1,2)

or for a column:

b = (repelem(1:430,1,2))'

[Sahil Jain]

Thanks a lot stephen!

[Stephan]

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