Default dimension of one-dimensional array of objects

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Leon 2021-7-12

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https://ww2.mathworks.cn/matlabcentral/answers/876938-default-dimension-of-one-dimensional-array-of-objects

编辑： Matt J 2021-7-12

Is there a way to specify default dimensions of an object array when only one dimension is used on instantiation. For example, initialising array of objects like below will return an array of dimensions (1, 5)

objArray(5) = MyClass;

I would like the default behaviour to be equivalent to the one below, where the array is of dimensions (5, 1).

objArray(5, 1) = MyClass;

I would require this to be able to extract certain properties of the class in correct arrangement after concatenation, e.g.

[objArray.propertyOne]

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Answer 1

Matt J 2021-7-12

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https://ww2.mathworks.cn/matlabcentral/answers/876938-default-dimension-of-one-dimensional-array-of-objects#answer_745093

编辑：Matt J 2021-7-12

在 MATLAB Online 中打开

The result of [objArray.propertyOne] will always be a row vector independent of the shape of objArray, so I don't think having the output object array in column vector form will help you (but you can use vertcat(objArray.propertyOne) instead ).

To answer your question, though, you can ensure a column vector shape by building and shaping the array inside the constructor, e.g., with

function objArray=MyClass(varargin)
%  objArray=MyClass(dim1,dim2,dim3,...)
 if nargin==0, return;end
 objArray(varargin{:})=MyClass;
if nargin==1
 objArray=objArray(:); 
end