How to add value to matrix?

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ryunosuke tazawa
ryunosuke tazawa 2021-10-13
评论： ryunosuke tazawa 2021-10-13
I want to add elements to matrix.
I want to add the calculated value to the end.　In the code below, I would like to add the calculated value of R to RR.
I tried R = []; RR (end + 1) = R ;, but only one value was added.
I want to add all the R calculated in one simulation to the RR.(R is one value.)
% Define of step function at each step in reinforcement learning
function [NextObservation, Reward, IsDone, LoggedSignals] = myStepfunction(Action,LoggedSignals,SimplePendulum)
statePre = [-pi/2;0];
statePre(1) = SimplePendulum.Theta;
statePre(2) = SimplePendulum.AngularVelocity;
IsDone = false;
SimplePendulum.pstep(Action);
state = [-pi/2;0];
state(1) = SimplePendulum.Theta;
state(2) = SimplePendulum.AngularVelocity;
X_state_Position = sin(state(1));
Y_state_Position = -cos(state(1));
RR = [];
R = ones(1,1);
Ball_Target = 10;
Ball_Distance = X_state_Position + (-state(2))* sqrt(2*abs(Y_state_Position)/9.8);
R = -abs(Ball_Distance -Ball_Target);
RR(end+1) = R;　
if (state(2) > 0) || (SimplePendulum.Y_Position < 0)
IsDone = true;
[InitialObservation, LoggedSignal] = myResetFunction(SimplePendulum);
LoggedSignal.State = [-pi/2 ; 0];
InitialObservation = LoggedSignal.State;
state = InitialObservation;
SimplePendulum.Theta =-pi/2;
SimplePendulum.AngularVelocity = 0;
end
LoggedSignals.State = state;
NextObservation = LoggedSignals.State;
Reward = +R;
end
  2 个评论
KSSV
KSSV 2021-10-13
There is no loop why you want to use end+1 or indexing?
ryunosuke tazawa
ryunosuke tazawa 2021-10-13
I tried to use for loop.
But reslut was -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274 -4.4274.
Although the value of R is constantly updated, only one value is added to RR.
RR = [];
for i=1:400
R = -abs(Ball_Distance -Ball_Target);
RR(end+1) = R;　
end

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