matlab-class

I have a class that has a function handle as one of its properties . classdef MyClass properties hfun %function handle end methods function obj = Myclass(hfun,...) %PROBLEM: validate that the input argument hfun is the right kind of function if ~isa(hfun,'function_handle') || nargin(hfun)~=1 || nargout(hfun)~=1 error('hfun must be a function handle with 1 input and 1 output'); end obj.hfun = hfun; end end end I'd like to make sure that the input argument hfun is a function handle with 1 input and 1 output, otherwise it should error. If I could get even more specific I'd like this function to

If I declare an object to be a subclass of handle classdef obj < handle my object is now essentially a "pointer" to some memory somewhere. How do I find out how much memory my object is using up? For example, say I have a class foo with a field bar classdef foo < handle properties bar = randn(1000); end bar takes up 8 megabytes (8 bytes * 1 million numbers) but if I type obj = foo(); whos('obj'); I get Name Size Bytes Class Attributes obj 1x1 60 foo How do I find out how much total memory obj points to? As a hack, convert it to a struct and see how much space that takes up. I think that will

Suppose I have the following class: classdef myClass < handle properties A = 1 end methods function obj = myClass(val) obj.A = val; end end end Say I instantiate an instance of this class, then manipulate it slightly and then copy it. As it's a handle class, the "copy" is really just another instance of the same object: >> q = myClass(10); >> q.A = 15; >> w = q; >> disp(w.A) 15 But I would like to watch A without needing to instantiate myClass. Naively doing >> value = w.A doesn't work, since this just copies the value; changning w.A later on will not change value . Is there a way to provide a

Why am I getting an error: ??? Error using ==> ensureCellType Too many input arguments. Error in ==> usage_dynamicVariableNaming at 11 result = dataHolder.ensureCellType(str); when I am passing in right number of parameters? % USAGE: clear all; clc; elementNames = {'area_12345[<>]6789', 'apollo123', 'guruX', 'ok'}; elementTypes = {'string', 'specialChar', 'int', 'float'}; elementValues = {'charlie', 'vvv', '09', '123.321'}; dataHolder = dynamicVariableNaming; str = 'test'; result = dataHolder.ensureCellType(str); %% CLASS classdef dynamicVariableNaming %HELLO Summary of this class goes here %

I come from a Java background. I am having issues with classes in Matlab particularly getters and setters. getting a message saying conflict between handle and value class I'm a little lost with what to do so any help for lack of a better word will be helpful. classdef Person properties(Access = private) name; age; end methods % class constructor function obj = Person(age,name) obj.age = age; obj.name = name; end %getters function name = get.name(obj) end function age = get.age(obj) end %setters function value = set.name(obj,name) end function value = set.age(obj,age) end end end

As an example, suppose I have created an abstract class called Shape and two subclasses called Circle and Rectangle that both implement an (abstract) method called Draw . I would like to be able to create a number of Circle and Rectangle objects, store them in an array and call Draw on each array object by iterating through the array. I have tried something like the following: Shape.m: classdef (Abstract) Shape < handle methods (Abstract) Draw(obj); end end Circle.m: classdef Circle < Shape methods function obj = Draw(obj) disp('This is a circle'); end end end Rectangle.m: classdef Rectangle <

I've come into ownership of a bunch of MATLAB code and have noticed a bunch of "magic numbers" scattered about the code. Typically, I like to make those constants in languages like C, Ruby, PHP, etc. When Googling this problem, I found that the "official" way of having constants is to define functions that return the constant value. Seems kludgey, especially because MATLAB can be finicky when allowing more than one function per file. Is this really the best option? I'm tempted to use / make something like the C Preprocessor to do this for me. (I found that something called mpp was made by