Rand in the constructor of a class and createArray

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Andrew Doppenberg
Andrew Doppenberg 2024-7-15
回答： Walter Roberson 2024-7-15
I'm attempting to use createArray to create an array of a class. The class constructor sets a property using rand. When I use createArray, every object in the array gets the same value of that property. Is there a workaround?

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回答（2 个）

Andres Adam
Andres Adam 2024-7-15
编辑：Walter Roberson 2024-7-15
It seems that createArray is not creating a new object for each element, but rather creating one and copying on the rest of the elements.
Maybe a workaround is to specify a copy method for your class, so the property changes with rand even when it is copied. Have you tried that?
https://www.mathworks.com/help/matlab/matlab_oop/custom-copy-behavior.html
Walter Roberson
Walter Roberson 2024-7-15
When you have static properties of the class, then the value that is assigned when the class is loaded is used for all subsequent members of the class. To change the value, you need to clear the class.
In short... you should not have assigned a per-instance property at the class level.

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