Specify nature/type of property

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elevonm
elevonm 2021-8-23
编辑： per isakson 2021-8-25
Hello,
I am writing a class in which I have the property 'food'. The property should be composed of a string specifying the type of food and a double specifying the number of calories. How do I specify this to the property? (As an example, just as I have specified 'string' to 'colour', I want to specify something for 'food')
classdef meals
properties
food
colour string
end
end
Thank you in advance for your help!
  2 个评论
Wan Ji
Wan Ji 2021-8-23
You can define another class called food
classdef food
properties
type string
calories double
end
end
Wan Ji
Wan Ji 2021-8-23
And then
classdef meals
properties
food food
colour string
end
end

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回答（2 个）

Wan Ji
Wan Ji 2021-8-23
First define the food class
Then define meals class
Now run meals in the command window, we get empty class meals with two field properties: food and colour
After that, look into this empty meals named ans
And see ans.food by double click it, food type and calories are there
per isakson
per isakson 2021-8-25
编辑：per isakson 2021-8-25
... or something like:
classdef meals
properties
food (1,1) struct = struct( 'type',{'wheat'}, 'calories',{123} );
colour string
end
end
>> m.food
ans =
struct with fields:
type: 'wheat'
calories: 123

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