MATLAB: Determining if the length of an array is even or odd

arrayevenfunctionlengthodd

How do i determine if the length of an array is even or odd? Is there a specific function that does this? I know length(A) gives you the length of an array, but for a function I am creating, whether the length of an array A is even or odd is a condition that must be satisfied for the function to compute its output.

Best Answer

if rem(length(A), 2) == 1
  % It's odd
end

Related Solutions

MATLAB: Odd and even numbers

You simply have to go back to the definition of odd and even. An (integer) number is even if it is divisible by 2, odd otherwise. Divisible by 2 means that the remainder when divided by 2 is 0. That is easy to test, the function to get the remainder is rem (or you can use mod).

As with many things in matlab you do not need a loop, the functions work on vector / matrices

m = [1 2 3;4 5 6]
iseven = rem(m, 2) == 0

MATLAB: How to perform a different calculation on the elements in an array based on whether they are odd or even

There are several ways to approach this. I would use ‘logical indexing’, and go from there:

x = 1:3:90;
even_x = rem(x,2) == 0;                             % Logical Index Of Even Values
odd_x  = rem(x,2) ~= 0;                             % Logical Index Of Odd Values

I leave the rest to you.

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Related Solutions

MATLAB: Odd and even numbers

MATLAB: How to perform a different calculation on the elements in an array based on whether they are odd or even

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