Problem removing negative numbers from my vector using for loop.

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John Lutz 2017-9-27

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评论： OCDER 2017-9-27

Not sure what to exactly do from here, as nothing has helped online. Not very good with for loops. Whenever doing this code (as shown) it deletes whatever amount of negatives I have from the start, rather than deleting the actual negative numbers.

Please keep and mind I must use a for loop and input display when doing this. Thank you.

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OCDER 2017-9-27

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Next time, post the code instead of a screen shot - it makes it easy for us to solve your issue via copy and paste. Use the {} code button to make it neat like this:

function y = displayVector
%code here

John Lutz 2017-9-27

Ok, thank you!

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OCDER 2017-9-27

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编辑：OCDER 2017-9-27

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Since you need a loop, consider creating a logical index matrix and then changing this where the negative numbers are. After the loop, delete the negative number from y.

function y = displayVector
y = input('Display vector: ');
DelIdx = zeros(1, numel(y), 'logical');
for k = 1:numel(y)
    if y(k) < 0
        DelIdx(k) = 1;
    end
end
y(DelIdx) = [];