matlab.settings.mustBeNumericScalar

Validate that setting value is a numeric scalar

Syntax

matlab.settings.mustBeNumericScalar(settingvalue)

matlab.settings.mustBeNumericScalar(settingvalue) issues an error if settingvalue is not a numeric scalar. This function does not return a value.

This function ignores input arguments that are empty values. Therefore, no error is thrown when the setting value is empty.

Create a setting and specify a function to validate that the setting value is a numeric scalar.

Create the settings group mysettings.

s = settings;
addGroup(s,'mysettings');

Add the setting MyNumericSetting to mysettings and specify the validation function matlab.settings.mustBeNumericScalar.

addSetting(s.mysettings,'MyNumericSetting','ValidationFcn',@matlab.settings.mustBeNumericScalar);

Test the validation function. Set the value of MyNumericSetting to a nonnumeric value. As expected, MATLAB^® throws an error.

s.mysettings.MyNumericSetting.PersonalValue = 'Hello';

Error setting 'MyNumericSetting' in group 'mysettings': Value must be numeric.

Setting value to validate, specified as a scalar of one of the following:

Other data types cause an error.

Introduced in R2019b