How to create array of user objects?

[belliott4488]

I've created a fairly simple class and can instantiate and work with objects of the class. Now someone has asked for the ability to create arrays of objects, which I thought would be straight-forward, but I'm getting errors from the subsref.m function.

I don't even understand why subsref is being called. I'm attempting to create an array as follows:

obj1 = myClass(args);
obj2 = myClass(args);
objArray = [obj1,obj2];

If I then ask for objArray(1), I get subsref errors, apparently because the objArray is of type myClass.

I thought subsref was for handling index references INTO an object, e.g. obj1(1), which might well return a value of a different type, whereas this is a case where I want to index into an array and get a myClass object as a return value.

What am I misunderstanding? Is there a way to assign objArray = [obj1,obj2];?

thanks,
Bruce

 

[belliott4488]

I found that my problem came from my having created stub member functions overriding the built-in subsref.m and subsasgn.m functions. I did this just to print meaningful warning messages to the screen, since I had thought that Matlab would fail with no helpful error messages otherwise.

It turns out that if I just leave these functions out all together -- which I could easily do since they were doing nothing useful -- then Matlab calls the built-in versions, and everything works fine.

I hope this will be helpful to someone.

- Bruce