You can define class methods in files that are separate from the class definition file, with certain exceptions (see Methods You Must Define in the classdef File).
To use multiple files for class definitions, put the class files
in a folder having a name beginning with the
followed by the name of the class (this is called a class folder).
Ensure that the parent folder of the class folder is on the MATLAB® path.
If the class folder is contained in one or more package folders, then the top-level package folder must be on the MATLAB path.
For example, the folder
@MyClass must contain
MyClass.m (which contains the
and can contain other methods and function defined in files having
.m extension. The folder
contain a number of files:
@MyClass/MyClass.m @MyClass/subsref.m @MyClass/subsasgn.m @MyClass/horzcat.m @MyClass/vertcat.m @MyClass/myFunc.m
MATLAB treats any.m file in the class folder as a method of the class. The base name of the file must be a valid MATLAB function name. Valid function names begin with an alphabetic character, and can contain letters, numbers, or underscores.
To define a method in a separate file in the class folder, create
the function in a file with the
.m extension. Do
not use the
in that file. Name the file with the function name, as with any function.
myFunc.m file, implement the method:
function output = myFunc(obj,arg1,arg2) ...% code here end
It is a good practice to declare the function signature in the
in a methods block:
classdef MyClass methods output = myFunc(obj,arg1,arg2) end ... end
If you specify method attributes for a method that you define
in a separate function file, include the method signature in a
classdef file. This methods block specifies
the attributes that apply to the method.
For example, the following code shows a method with
private in the
The method implementation resides in a separate file. Do not include
methods block. Include only the function
signature showing input and output arguments.
classdef MyClass methods (Access = private) output = myFunc(obj,arg1,arg2) end end
In a file named
myFunc.m, in the
define the function:
function output = myFunc(obj,arg1,arg2) ... end
To create a static method, set the method
true and list the function signature in a static
methods block in the
classdef file. Include the
input and output arguments with the function name. For example:
classdef MyClass ... methods (Static) output = staticFunc1(arg1,arg2) staticFunc2 end ... end
Define the functions in separate files using the same function
signature. For example, in the file
function output = staticFunc1(arg1,arg2) ... end
function staticFunc2 ... end
Define the following methods in the
You cannot define these methods in separate files:
All functions that use dots in their names, including:
Converter methods that must use the package name as part of the class name because the class is contained in packages
Property set and get access methods