max of two arrays one being empty returns the empty array

i need to find maximum of elements of two arrays. if one is empty, Max function always returns the empty one. For ex: A=[]; B=[5]; max(A,B) returns [].

How to solve the problem ?

Answer 1

[BhaTTa]

Hey @Harish Dhanasekaran Velayutha Rajan, I assume that if one of the array among 'A' or 'B' is empty you need to return [], or else you need to return maximum element, below I have attached the logic for the same, please take it as a reference and implement your function accordingly:

% Define the arrays
A = [3,4,6,7];
B = [5];

% Check if either array is empty and handle accordingly
if isempty(A) || isempty(B)
    maxValue = [];
else
    % Both arrays are non-empty, return the maximum of both
    maxValue = max(max(A), max(B));
end

% disp(maxValue); you can enclose the code block inside a function and return the maxValue.

Hope it helps.

Answer 2

[Walter Roberson]

This is the way that max() is defined: the maximum of an empty array is an empty array.

A=[]; B=[5];
max(A,B)

ans =

     []

max(B,A)

ans =

     []

However, if the second array is empty and further options were provided, then it is treated as a special syntax and takes the maximum of the first array subject to the options.

max(B,A,1)

ans = 5

max(A,B,1)

Error using max
Specifying the operating dimension is not supported for two input arrays.