How do I access properties of objects embedded inside another object organized in an array?

Question

J. Womack 2017-3-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/332432-how-do-i-access-properties-of-objects-embedded-inside-another-object-organized-in-an-array

编辑： per isakson 2017-4-1

I have created two classes, an 'inner' and 'outer' class. The 'outer' class has properties defined by methods that depend on data from the 'inner' class. I want to access properties for an array objects from the 'inner' class embedded inside an array of 'outer' class objects. I have tried indexing using various methods to no avail.

For example, I have 10 'outer' objects with 3 'inner' objects embedded within each. If I want to simultaneously define a value for a property of the array of 30 'inner' objects, I cannot. I have tried:

outer_obj(:,1).inner_obj(:,1).inner_property = value

but am getting an error. I haven't seen documentation that provides guidance on how to assign values to properties of an array of objects that are embedded inside an array.

Any assistance is greatly appreciated.

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Geoff Hayes 2017-3-29

Please describe the error that you are observing. Copy and paste the full error message to your question (and the code that leads to the error).

per isakson 2017-4-1

编辑：per isakson 2017-4-1

Is this the error message you see?

Expected one output from a curly brace or dot indexing expression, 
but there were 2 results.

"I haven't seen documentation that provides guidance ... "

Why do you think it is possible?
What's not found in the documentation is typically not implemented!

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Answer 1

Iddo Weiner 2017-4-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/332432-how-do-i-access-properties-of-objects-embedded-inside-another-object-organized-in-an-array#answer_261293

% build an empty struct
A = struct;
A.outer = struct;
% either fill it
for i = 1:10
    for j = 1:3
        A(i,1).outer(j,1).inner = [i,j];
    end
end
% or make it homogeneous
val = 'homogeneous input'
for i = 1:10;
    for j = 1:3
        A(i,1).outer(j,1).inner = val;
    end
end