How to get the index of the first non-zero element in an 1-D array in SIMULINK

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Benjamin Wang 2011-4-6

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https://ww2.mathworks.cn/matlabcentral/answers/4873-how-to-get-the-index-of-the-first-non-zero-element-in-an-1-d-array-in-simulink

Hi, guys

I want to find the index of the first non-zero element in a 1-D array in simulink, just like the way that 'find' command in matlab did.

For example:

x = [0 0 5 0 3 0];
idx = find(x~=0, 1, 'first');

The answer would be:

idx = 3.

So, how to do this in simulink?

Thanks!

by Ben

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Arnaud Miege 2011-4-6

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Use the Find block.

HTH,

Arnaud

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Hongmei Hu 2011-5-31

HI, i had very similar problem.

I am doing the svd in Simulink, I got the eigenvalue, now I want to set some eigenvalues smaller than a given value to zero. for example, if the eigenvalue small than 2, i set it to zero and keep those eigen values large than 2 unchanged, incuding the place in the matix and the value.

PS: my matlab is 2009b, there are no Find block. so I can not use that block to find the zero value also.

br,

hongmei

Arnaud Miege 2011-5-31

Not sure. Please create a new question with a meaningful title rather than append your question to an existing one, you're much more likely to get an answer, see:

http://www.mathworks.co.uk/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

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