How to access sub-properties from an object array?

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.

Answer 1

[per isakson]

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.

[Walter Roberson]

   array = arrayfun(@(P) P.eye.color, person);   %hidden loop

[Aidan K]

Thanks. Seemed to do the trick.