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Problem 6. Select every other element of a vector

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军 川
军 川 2022-4-27
评论： Matt J 2022-4-27
function x = everyOther(x)
n=length(x)
if mod(x,2)==1
i=1:2:n
expected=[x(i)]
else
i=1:2:n-1
expected=[x(i)]
end
end
This is the code I wrote
Why is this a mistake

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回答（1 个）

Matt J
Matt J 2022-4-27
编辑：Matt J 2022-4-27
It's wrong because you have assumed that IF statements on a vector distribute in some way across the elements of the vector. They don't. The implementation can be done in one line,
function x = everyOther(x)
x=x(1:2:end);
end
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Matt J
Matt J 2022-4-27
You are quite welcome, but please Accept-click the answer to indicate that it was what you needed.

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