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

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?

[Stephen23]

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?

Answer 1

[Star Strider]

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

Answer 2

[MD ZIHADUL ISLAM TUSAR]

function y = everyOther(x)
n=length(x);
y=x(1:2:n);
end