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Count the index of the array

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Mekala balaji
Mekala balaji 2014-12-20
评论： madhan ravi 2018-12-3
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

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2014-12-20
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 个评论
Shoaibur Rahman
Shoaibur Rahman 2014-12-20
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.

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更多回答（2 个）

Shoaibur Rahman
Shoaibur Rahman 2014-12-20
A=[0 0 0 0 0 0 0 0 0 10 0 0 0 0 15 0 17];
sum(A>0)
Javaid Iqbal
Javaid Iqbal 2018-12-3
n=numel(A);
  1 个评论
madhan ravi
madhan ravi 2018-12-3
no this would give you total number of elements in the array

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