A function that counts the number of zeros in a vector

Question

Lubos Plechac 2021-10-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1562271-a-function-that-counts-the-number-of-zeros-in-a-vector

回答： Jan 2021-10-12

D = ones(1,20);

for i = 1:20;

if mod(i,2) == 0;

D(i) = 0;

end

---------

D = [ 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0]

and I need A function that counts the number of zeros in a vector I know there are 10 zeros but how to earn? I found only this but is not enough.

sum(find(D==0)/11) = 10

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Answer 1

Stephen23 2021-10-12

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https://ww2.mathworks.cn/matlabcentral/answers/1562271-a-function-that-counts-the-number-of-zeros-in-a-vector#answer_807161

编辑：Stephen23 2021-10-12

D = [1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0];
nnz(D==0)
ans = 10

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Answer 2

Dave B 2021-10-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1562271-a-function-that-counts-the-number-of-zeros-in-a-vector#answer_807166

you were pretty close, you just didn't need the find, or the /11

D = [ 1     0     1     0     1     0     1     0     1     0     1  0     1     0     1     0     1     0     1     0]
D = 1×20
     1     0     1     0     1     0     1     0     1     0     1     0     1     0     1     0     1     0     1     0
sum(D==0)
ans = 10