# How to make a array from a loop?

4 次查看（过去 30 天）
Thanathip Boonmee2019-11-25

j=0;
for i = 1:1440
Z(i) = powerConsumption(i) - solarEnergyGenerated(i);
if (Z(i) < 0) && (j <1200) %Proceed if {Power consumption minus PV is less than 0} and {Battery level is less than 1200kWmin=20kWh}
j = -Z(i) + j; %Charging
elseif (Z(i) > 0) && (j>Z(i)) %Proceed if {Power consumption minus PV is more than 0} and {Battery level is more than Z(i)}
j = j - Z(i); %Discharging
end
end
I am trying to make a battery algorithm on when to charge and discharge. I am not sure how to make a array of 1440x1 from this loop.
I want to make this array to make a plot out of it.

### 回答（1 个）

M 2019-11-25

You can do something like:
nb = 1440;
j = zeros(1,nb);
Z = zeros(1,nb);
for i = 1 : nb
Z(i) = powerConsumption(i) - solarEnergyGenerated(i);
if i > 2
j(i) = j(i-1) - Z(i);
end
end
You are actally doing the same thing in your 2 conditions "if" and "else".
Then you can plot j and Z :
t = 1 : nb;
plot(t,j);
##### 3 个评论显示隐藏 2更早的评论
M 2019-11-25
I want j to be an array of 1440x1
j = zeros(1440,1)
defines a vector of size 1440 x 1.
Then access each element with j(k), with k = 1 , ... , 1440

R2019b

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