How to access sub-properties from an object array?
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So I have an array of objects and I ideally want to return an array of sub-properties two layers deep (if that makes sense). For example, I would like:
array=person.eye.color
to return all of the person eye colors into one array. I can return an array of eye objects but not the eye colors themselves.
I get the error: "Expected one output from a curly brace or dot indexing expression, but there were 3 results."
I'm not a very experienced programmer or very familiar with Matlab's structure, any advice? Thanks.
回答（1 个）
per isakson
2018-10-27
0 个投票
Assuptions
- person is the array of objects
- person has a property named, 'eye', the value of which is an eye-object
Answer
There is no one-liner that does what you want. You have to loop over all persons of the array.
2 个评论
Walter Roberson
2018-10-27
array = arrayfun(@(P) P.eye.color, person); %hidden loop
Aidan K
2018-10-28
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