The task of overloading the “plus” operator for a custom MATLAB class can be achieved by defining a method named “plus” within the class that dictates how two instances of the class should be added.
First, determine the sizes of the input object arrays and compute the resulting size using “max(size(obj1), size(obj2))” function. Next, expand the input arrays to this common size using “repmat” function, ensuring that each element aligns correctly for addition. Finally, iterate over the expanded arrays, performing the addition operation on each corresponding element's properties, and return a new array of the custom objects containing the summed results.
Here is the MATLAB code to achieve the same:
classdef MyObject
properties
a
b
end
methods
function obj = MyObject(a, b)
if nargin > 0
obj.a = a;
obj.b = b;
end
end
function obj = plus(obj1, obj2)
size1 = size(obj1);
size2 = size(obj2);
% Determine the resulting size using implicit expansion rules
resultSize = max(size1, size2);
% Expand obj1 and obj2 to the resulting size
obj1 = repmat(obj1, resultSize ./ size1);
obj2 = repmat(obj2, resultSize ./ size2);
% Perform element-wise addition
obj(resultSize(1), resultSize(2)) = MyObject();
for i = 1:resultSize(1)
for j = 1:resultSize(2)
obj(i, j).a = obj1(i, j).a + obj2(i, j).a;
obj(i, j).b = obj1(i, j).b + obj2(i, j).b;
end
end
end
end
end
%Test Script
obj1(1, 1) = MyObject([1 -1], [0 1; 0 0]);
obj1(1, 2) = MyObject([2 2], [1 0; 0 1]);
obj2(1, 1) = MyObject([3 3], [1 1; 1 1]);
obj2(2, 1) = MyObject([0 -1], [0 0; 1 0]);
% Perform addition with implicit expansion
sumObj = obj1 + obj2;
For more information on the functions used refer to the following documentation:
I hope this assists in resolving the issue.
