Change class property inside of class function/method

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Metin Akyol
Metin Akyol 2022-2-7
评论： Metin Akyol 2022-2-7
I would like assign a new value to a variable created in my class, but the below approach does not update the variable. Is there a different approach?
classdef class_1
properties
var_1
end
function consistency_check_trades(obj)
obj. var_1 = 2
end
end

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Steven Lord
Steven Lord 2022-2-7
Your class does not inherit from the handle class so it has value class behavior. See this documentation page for a discussion of the differences between handle and values classes,
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Steven Lord
Steven Lord 2022-2-7
Ran in:
That's one way of solving the problem, yes. But being a handle class also comes with some other behaviors. If your class_1 objects aren't tied to something where it makes sense for multiple objects to refer to the same thing (like a figure window on screen):
f1 = figure; % f1 is a handle
f2 = f1; % f2 refers to the same figure as f1
f1.Color
ans = 1×3
1 1 1
f2.Color = 'r'; % Not changing f1's Color property
f1.Color % but the figure to which it refers changed so its property changed
ans = 1×3
1 0 0
Consider if leaving it as a value class (if that makes more sense) and returning the modified object from your method.
Metin Akyol
Metin Akyol 2022-2-7
Very helpful, thank you for adding some further explanation to this Steven.

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