The following table shows, for each built-in numerical operation, the corresponding function name to use when providing an overloaded method for a user class.
| Operation | Method | Description |
|---|---|---|
a + b | plus (a, b) | Binary addition |
a - b | minus (a, b) | Binary subtraction |
+a | uplus (a) | Unary addition |
-a | uminus (a) | Unary subtraction |
a .* b | times (a, b) | Element-wise multiplication |
a * b | mtimes (a, b) | Matrix multiplication |
a ./ b | rdivide (a, b) | Element-wise right division |
a / b | mrdivide (a, b) | Matrix right division |
a .\ b | ldivide (a, b) | Element-wise left division |
a \ b | mldivide (a, b) | Matrix left division |
a .^ b | power (a, b) | Element-wise power |
a ^ b | mpower (a, b) | Matrix power |
a < b | lt (a, b) | Less than |
a <= b | le (a, b) | Less than or equal to |
a > b | gt (a, b) | Greater than |
a >= b | ge (a, b) | Greater than or equal to |
a == b | eq (a, b) | Equal to |
a != b | ne (a, b) | Not equal to |
a & b | and (a, b) | Logical and |
a | b | or (a, b) | Logical or |
!a | not (a) | Logical not |
a' | ctranspose (a) | Complex conjugate transpose |
a.' | transpose (a) | Transpose |
a:b | colon (a, b) | Two element range |
a:b:c | colon (a, b, c) | Three element range |
[a, b] | horzcat (a, b) | Horizontal concatenation |
[a; b] | vertcat (a, b) | Vertical concatenation |
a(s_1,…,s_n) | subsref (a, s) | Subscripted reference |
a(s_1,…,s_n) = b | subsasgn (a, s, b) | Subscripted assignment |
b(a) | subsindex (a) | Convert object to index |
disp | disp (a) | Object display |
Table 34.1: Available overloaded operators and their corresponding class method
An example mtimes method for the polynomial class might look like
function p = mtimes (a, b) p = polynomial (conv (double (a), double (b))); endfunction