Optimization of manipulating an array

1 view (last 30 days)
I have an array, where 0s are between non-zeros integer or floating numbers.
>> a = [1, 0, 5, 0, 6, 0, 12, 0];
I am looking to find the average of every adjacent two numbers and insert it to replace the zero between them:
like for the example above:
>> b = [1, 3, 5, 5.5, 6, 9, 12, 15]
For the last 0, we should add the difference between 12 and 9 to the last value, which is 12. So that makes (12 - 9) + 12.
I am looking for an optimized code (may be if possible without loop).
Thanks

Accepted Answer

Ive J
Ive J on 28 Feb 2022
a = [1, 0, 5, 0, 6, 0, 12, 0];
b = a;
a_adj_mean = movmean(a(1:2:end), 2);
zero_idx = a == 0;
b(zero_idx(1:end - 1)) = a_adj_mean(2: end);
b(end) = 2*b(end-1) - b(end - 2)
b = 1×8
1.0000 3.0000 5.0000 5.5000 6.0000 9.0000 12.0000 15.0000

More Answers (0)

Products


Release

R2013a

Community Treasure Hunt

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

Start Hunting!