string data type is not a class?

METHODS Display class method names. METHODS CLASSNAME displays the names of the methods for the class with the name CLASSNAME. Use the functional form of METHODS, such as METHODS(S), when CLASSNAME is a string scalar. METHODS(OBJECT) displays the names of the methods for the class of OBJECT. M = METHODS(...) returns the method names in a cell array of character vectors. If CLASSNAME represents a MATLAB or Java class, then only public methods are returned, including those inherited from base classes. METHODS differs from WHAT in that the methods from all method directories are reported together, and METHODS removes all duplicate method names from the result list. METHODS CLASSNAME -full displays a full description of the methods in the class, including inheritance information and, for MATLAB and Java methods, method attributes and signatures. Duplicate method names with different signatures are not removed. M = METHODS( ..., '-full') returns the full method descriptions in a cell array of character vectors. The word METHODS is also used in a MATLAB class definition to denote the start of a methods definition block. Examples: %Example 1: %Retrieve the names of the public methods of class 'memmapfile' %and capture the result in a cell array of character vectors. methodnames = methods('memmapfile'); %Example 2: %Construct a java.lang.String instance and display the names of %the public methods of that instance. s = java.lang.String; methods(s); See also METHODSVIEW, PROPERTIES, EVENTS, CLASSDEF, WHAT, WHICH. Documentation for methods doc methods Other functions named methods icdevice/methods imaqdevice/methods icgroup/methods iviconfigurationstore/methods icinterface/methods serial/methods imaqchild/methods

Methods for class string: append contains eq extractAfter gt issorted lt pad reverse startsWith cellstr count erase extractBefore insertAfter join matches plus sort strip char double eraseBetween extractBetween insertBefore le ne replace split strlength compose endsWith extract ge ismissing lower or replaceBetween splitlines upper