Skipping certain values in an array but still continuing the array

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Sandip Ghatge 2020-6-28

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评论： Sandip Ghatge 2020-6-28

I have written a code to skip negative values, but it gives an error, i only want positive values of an array while the negative values must be skipped. (I also dont want zeros in place of these negative values, i just want an array without the negative values)

The code is,

y = zeros(100,1);
for i = 1:100
    j = i/10;
    y(i,1) = sin(j);
    if y(i,1)<0
        y(i,1) = [];
    end
end

But this gives error

I also tried using the 'break' command, but it gives all zeros just after the first negative value has been encountered.

Can you please suggest a way out?

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采纳的回答

madhan ravi 2020-6-28

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https://ww2.mathworks.cn/matlabcentral/answers/555988-skipping-certain-values-in-an-array-but-still-continuing-the-array#answer_458158

在 MATLAB Online 中打开

y = nonzeros(sin(1:1e2));

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madhan ravi 2020-6-28

在 MATLAB Online 中打开

y = nonzeros((sin(1:1e2)>0) .* sin(1:1e2));

Sandip Ghatge 2020-6-28

Thank you, that gives the desired answer.

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MATLAB Language Fundamentals Matrices and Arrays Matrix Indexing

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