Unit Commitment

[A-A-123]

Following a proposed tutorial on unit commitment (https://yalmip.github.io/example/unitcommitment/). I do have two questions please:

1. In case another factor (Alpha) needs to be included in the model, then how can this happen? Currently, cost function is (CP+QP^2), and it is proposed to have it as (Alpha+CP+QP^2), where Alpha is simply fixed and does not depend on P but it is deafferent for each generator unit. Should the objective be as:
   Objective = Objective +Alpha*onoff(:,k)+ P(:,k)'QP(:,k) + C*P(:,k);

2. I keep getting different results by changing the initial value of Objective from Objective=0 to Objective=[], and the stairs(value(P)') is totally different for each case, why is that (I have another case where the code shows error if Objective=0 but it runs fine when Objective=[])?
   When Objective=[], the following message is shown but no list of iterations:
   "ptimal solution found. Intlinprog stopped at the root node because the objective value is within a gap tolerance of the optimal value, options.AbsoluteGapTolerance = 0. The intcon variables are integer within tolerance, options.IntegerTolerance = 1e-05."

[johanlofberg]

1. Yes
2. Initializing to [] makes no sense because you cannot add to an empty array

>> []+1

ans =

     []