MATLAB Answers

Count the index of the array

50 views (last 30 days)
Hi, I have a array like below: [0 0 0 0 0 0 0 0 0 10 0 0 0 0 15 0 17]
I want count how many numbers >0 in the array (like in this case count is 3 (because 10,15,&17). Can some please help me how to count this in matlab. Thanks in advance

  0 Comments

Sign in to comment.

Accepted Answer

Azzi Abdelmalek
Azzi Abdelmalek on 20 Dec 2014
If your array doesn't contain negative numbers
a=[0 0 0 0 0 0 0 0 0 10 0 0 0 0 15 0 17]
out=nnz(a)

  2 Comments

Shoaibur Rahman
Shoaibur Rahman on 20 Dec 2014
nnz will count the number of all non-zero elements in the array, including negatives. So, this function would be a better choice if you want to do so.
Mekala balaji
Mekala balaji on 20 Dec 2014
Great Thank you sir

Sign in to comment.

More Answers (2)

Shoaibur Rahman
Shoaibur Rahman on 20 Dec 2014
A=[0 0 0 0 0 0 0 0 0 10 0 0 0 0 15 0 17];
sum(A>0)

  0 Comments

Sign in to comment.


Javaid Iqbal
Javaid Iqbal on 3 Dec 2018
n=numel(A);

  1 Comment

madhan ravi
madhan ravi on 3 Dec 2018
no this would give you total number of elements in the array

Sign in to comment.

Community Treasure Hunt

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

Start Hunting!