https://in.mathworks.com/help/matlab/ref/mustbenonzerolengthtext.html
mustBeNonzeroLengthText - Validate that value is text with nonzero length - MATLAB
This MATLAB function throws an error if value does not have at least one character in each element or if the input is not text.
validatevaluetextnonzerolength
https://de.mathworks.com/help/matlab/ref/mustbenonzerolengthtext.html
mustBeNonzeroLengthText - Validate that value is text with nonzero length - MATLAB
This MATLAB function throws an error if value does not have at least one character in each element or if the input is not text.
validatevaluetextnonzerolength