This class constrains the value ofProp1to be greater than or equal to3。

classdefMyClasspropertiesProp1{mustBeGreaterThanOrEqual(Prop1,3)}endend

Create an object and assign a value to its property.

obj = MyClass; obj.Prop1 = 2;

Error setting property 'Prop1' of class 'MyClass': Value must be greater than or equal to 3.

当你分配一个值的属性,MATLAB callsmustBeGreaterThanOrEqualwith the value being assigned to the property.mustBeGreaterThanOrEqualissues an error because the value2is not greater than or equal to3。

functionr = mbGreaterThanOrEqual(x)argumentsx{mustBeGreaterThanOrEqual(x,5)}endr = x - 5;end

Calling the function with a vector that contains values that are less than 5 does not meet the requirements defined withmustBeGreaterThanOrEqualand results in an error.

x = [12.7, 45.4, 4.9, 77.1, 53.1]; r = mbGreaterThanOrEqual(x);

Error using mbGreaterThanOrEqual Invalid input argument at position 1. Value must be greater than or equal to 5.