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How do I refer to only the odd-numbered elements in any given vector?

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Emily Hornbuckle
Emily Hornbuckle 2015-2-3
回答： MD ZIHADUL ISLAM TUSAR 2022-10-3
Given a vector I want to write a function that only refers to the odd-numbered elements in that given vector. How would I do this?
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Stephen23
Stephen23 2015-2-3
What is an "odd-numbered" element? An element for which the index is odd (keep in mind that MATLAB uses one-based indexing!), or where the element value itself is odd?

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回答（2 个）

Star Strider
Star Strider 2015-2-3
I’m not certain what you mean by ‘odd-numbered elements’, so here are two possibilities:
v = [10:20];
oddidx = @(v) v(1:2:end); % Addressing Odd-Indexed Elements
oddval = @(v) v(rem(v,2) == 1); % Addressing Odd-Valued Elements
y1 = oddidx(v)
y2 = oddval(v)
produces:
y1 =
10 12 14 16 18 20
y2 =
11 13 15 17 19
MD ZIHADUL ISLAM TUSAR
function y = everyOther(x)
n=length(x);
y=x(1:2:n);
end

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