MATLAB Answers

Fast creation of vector [0 0 1 1 2 2 3 3... n n]

35 views (last 30 days)
Simon
Simon on 30 Jun 2014
Edited: per isakson on 3 Jul 2014
Hi all,
like mentioned in the title, is there a fast way of creating a vector with repeating digits?
Thanks!
Simon

Accepted Answer

per isakson
per isakson on 30 Jun 2014
Edited: per isakson on 30 Jun 2014
Test
>> reshape( cat( 1, [0:n], [0:n] ), 1, [] )
ans =
0 0 1 1 2 2 3 3 4 4 5 5
and
>> reshape( repmat( [0:n], 2,1 ), 1, [] )

More Answers (3)


Jos (10584)
Jos (10584) on 30 Jun 2014
n = 10 % max value
k = 3 % number of repetitions
V = floor((0:k*(n+1)-1)/k)
  3 Comments
per isakson
per isakson on 1 Jul 2014
Is this solution immune to floating point errors?

Sign in to comment.


Danilo NASCIMENTO
Danilo NASCIMENTO on 30 Jun 2014
V=zeros(1,20);
k=0;
i=1;
while i<20
V(i)=k;
V(i+1)=k;
k=k+1;
i=i+2;
end
V

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!