Problem 6. Select every other element of a vector

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

Answer 1

[Matt J]

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

[Image Analyst]

Or, depending on what index you want to start on:

function x = everyOther(x)
x = x(2 : 2 : end);
end

[Matt J]

军 川 's reply relocated here:

thank you.it's nice

[Matt J]

You are quite welcome, but please Accept-click the answer to indicate that it was what you needed.