Creating a sequence with repeating numbers

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Sahil Jain
Sahil Jain 2019-7-20
评论： Stephan 2019-7-20
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)

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Stephan
Stephan 2019-7-20
编辑：Stephan 2019-7-20
b = repelem(1:430,1,2)
or for a column:
b = (repelem(1:430,1,2))'

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