When trying to modify object properties in the command window, it seems that the first input argument (the object name) is always omitted. Why is this the case?
Also, when I make the object name the second input argument, then I get the following error: "Attempt to reference field of non-structure array." Why does the object have to be the first input argument?
An example (straight from MathWorks documentation) is shown below, and the relevant line is the "withdraw" method. As you can see, the object is an input argument but when you use this method from the command window you say BA.withdraw(600) instead of BA.withdraw(BA,600). Why is that?
Thank you!
classdef BankAccount < handle properties (Hidden) AccountStatus = 'open'; end % The following properties can be set only by class methods
properties (SetAccess = private) AccountNumber AccountBalance = 0; end % Define an event called InsufficientFunds
events InsufficientFunds end methods function BA = BankAccount(AccountNumber,InitialBalance) BA.AccountNumber = AccountNumber; BA.AccountBalance = InitialBalance; % Calling a static method requires the class name
% addAccount registers the InsufficientFunds listener on this instance
AccountManager.addAccount(BA); end function deposit(BA,amt) BA.AccountBalance = BA.AccountBalance + amt; if BA.AccountBalance > 0 BA.AccountStatus = 'open'; end end function withdraw(BA,amt) if (strcmp(BA.AccountStatus,'closed')&& BA.AccountBalance < 0) disp(['Account ',num2str(BA.AccountNumber),' has been closed.']) return end newbal = BA.AccountBalance - amt; BA.AccountBalance = newbal; % If a withdrawal results in a negative balance,
% trigger the InsufficientFunds event using notify
if newbal < 0 notify(BA,'InsufficientFunds') end end % withdraw
end % methods
end % classdef
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