Efficient reordering of vector
1 view (last 30 days)
Show older comments
I would like to reorder vector as following:
a = [1 2 3 4 5 6 7 8 9 10 11 12]
to
r = [1 5 9 2 6 10 3 7 11 4 8 12]
what would be efficient way of doing so?
0 Comments
Accepted Answer
Walter Roberson
on 3 Dec 2015
reshape( reshape(a, 4, 3).', 1, [])
3 Comments
Walter Roberson
on 3 Dec 2015
In that line, "stride" would have to mean the number of elements in each sub-group. I tend to instead think of stride in terms of the difference between adjacent indices, and for that you would use
reshape(reshape(a,stride,[]).' 1, [])
More Answers (0)
See Also
Categories
Find more on Read, Write, and Modify Image in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!