Arrays from object properties within object arrays

11 views (last 30 days)
I want to know if there is an efficent way to extract an array of values from properties of objects in an object array. Let's say I have an class called 'car' with one property 'mpg' that is set with its constructor method.
prius = car(55); % create prius car and set mpg to 55
tacoma = car(22); % create tacoma car and set mpg to 22
Let's also say that I create an array of cars called inventory
inventory = [prius; tacoma];
Is there a way to extract the properties of all the cars as a vector without a 'for' loop? I know I could do the following
for i = 1:length(inventory)
mpg_list(i) = inventory(i).mpg;
end
but I would like a single line command like
mpg_list = inventory(:).mpg
If I execute the last line in the command window I get
mpg_list =
55
which is the first value, but I want all of them so that mpg_list = [55; 22].

Accepted Answer

Ameer Hamza
Ameer Hamza on 19 May 2020
val = [inventory.mpg];

More Answers (0)

Categories

Find more on Matrices and Arrays in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!