Creating a vector with duplicate points after point 1

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Brian
Brian 2011-11-17
Hello, thanks for reading this.
I want to create a vector which the first point is 1, and then each point after is a duplicate, as in:
1 2 2 3 3 4 4 5 5 etc
There is probably a easier way to do this than what I imagine; what would you recommend?
Thanks

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Andrei Bobrov
Andrei Bobrov 2011-11-17
variant
n=7;
out = [1 reshape(ones(2,1)*(2:n),1,[])]
variant 2
out = ones(1,2*n-1)
out(2:2:end) = 2:n
out(3:2:end) = 2:n

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