Arrays from object properties within object arrays

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].

Answer 1

[Ameer Hamza]

val = [inventory.mpg];

[Michael]

Thanks!