I get an error when trying to run my function using a simulink block.

function [DefuelSwitch, Defuel, EnginesOnSwitch] = defuelingtrigger(u)

    % Unpack the inputs
    time = u(1);

    %fprintf('Pilot: Time[%f]\n',time);    
 
    % Switches
    DefuelSwitchInput    = u(2);
    EnginesOnSwitchInput = u(3);
    Defuel = u(4);

    DefuelSwitch = DefuelSwitchInput;
    EnginesOnSwitch = EnginesOnSwitchInput;
    Defuel = -(RefuelQuantity) ;    

    if (DefuelSwitch == 1) && (EnginesOnSwitch == 1)

        DefuelSwitch = 0;
        EnginesOnSwitch = 0;
        disp('Both switches can not be ON at the same time')

y = [DefuelSwitch, Defuel, EnginesOnSwitch];
    end
         % Pack the outputs
    y(2) = DefuelSwitch;
    y(4) = Defuel;
    y(3) = EnginesOnSwitch;
    

    
end
%the imputs are in my simulink model and its only returning one output. 
% im a novice so any suggestions will be appreciated!

[Sulaymon Eshkabilov]

This is your MATLAB code and what about your Simulink model?

[osman cusmaan]

[osman cusmaan]

it returns one output for some reason

[osman cusmaan]

its the matlab code for the block

Answer 1

[Walter Roberson]

 if (DefuelSwitch == 1) && (EnginesOnSwitch == 1)

If that condition is not true, you do not assign anything to y, but you need the value of y after the end of the if statement.

[osman cusmaan]

thanks alot! I'm on the next level of errors now! (i'm making this a game before i lose my mind)

[osman cusmaan]

i'll let you know when i beat the boss error XD