Main Content


Validate that value is greater than another value



mustBeGreaterThan(value,c) throws an error if any elements in value are less than or equal to the scalar c. This function does not return a value.

mustBeGreaterThan calls these functions to determine if value is greater than c:

Class support: All numeric classes, logical, and MATLAB® classes that overload the functions called by mustBeGreaterThan.

This function ignores empty values in the first input argument. Therefore, no error is thrown when the property or function argument value is empty.


collapse all

Use mustBeGreaterThan to validate that the values in the first input are greater than the value of the second input.

mustBeGreaterThan([2 3 4],2)
Error using mustBeGreaterThan (line 19)
Value must be greater than 2.

This class restricts the value of Prop1 to be greater than 2.

classdef MyClass
      Prop1 {mustBeGreaterThan(Prop1,2)}

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 2.

When you assign a value to the property, MATLAB calls mustBeGreaterThan with the value being assigned to the property. mustBeGreaterThan issues an error because the value 2 is not greater than 2.

This function restricts the input argument to be values that are greater than 5.

function r = mbGreaterThan(x)
        x {mustBeGreaterThan(x,5)}
    r = x - 5;

Calling the function with a vector that contains values that are less than or equal to 5 does not meet the requirements defined with mustBeGreaterThan and results in an error.

x = [12.7, 45.4, 5.0, 77.1, 53.1];
r = mbGreaterThan(x);
Error using mbGreaterThan
Invalid input argument at position 1. Value must be greater than 5.

Input Arguments

collapse all

Value to validate, specified as a scalar or an array of one of the following:

Constant value that the value argument must be greater than, specified as a scalar of one of the following:


  • mustBeGreaterThan is designed to be used for property and function argument validation.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Introduced in R2017a