Validate that the result of an operation is numeric.

mustBeNumeric(5 < 10)

Values must be numeric.

The relational operator for less than returns a logical value.

This class restricts the value ofProp1to numeric values.

classdefMyClasspropertiesProp1{mustBeNumeric}endend

Create an object and assign a value to its property.

obj = MyClass; obj.Prop1 = isprime(29);

Error setting 'Prop1' property of 'MyClass' class: Values must be numeric.

When you assign a value to the property, MATLAB^®callsmustBeNumericwith the value being assigned to the property.mustBeNumericissues an error because the value assigned toProp1is a logical.

functionr = mbNumeric(x)argumentsx(1,:) {mustBeNumeric}endp = [3 2 1]; r = polyval(p,x);end

Calling this function with a character vector results in an error being thrown bymustBeNumeric.

x ='4 3 2'; r = mbNumeric(x);

Error using mbNumeric r = mbNumeric(x); ↑ Invalid input argument at position 1. Value must be numeric.