Undefined function 'cost' for input arguments of type 'char'.

Hello everyone, can you please help me with this problem? I currently in my project's for Iterative Method. But I can't run the coding because of this problem.

cost I(:,i)=alpha+(beta.*P)+(gamma.*P.*P);

Attached below is my full coding, can you guys help me?

clear clc;

% n all alpha beta gamma min max

d=[1 550 8.1000 0.00028 0 680

2 309 8.1000 0.00056 0 360

3 307 8.1000 0.00056 0 360

4 240 7.7400 0.00324 60 180

5 240 7.7400 0.00324 60 180

6 240 7.7400 0.00324 60 180

7 240 7.7400 0.00324 60 180

8 240 7.7400 0.00324 60 180

9 240 7.7400 0.00324 60 180

10 126 8.6000 0.00284 40 120

11 126 8.6000 0.00284 40 120

12 126 8.6000 0.00284 55 120

13 126 8.6000 0.00284 55 120];

Pd=1800; %Pdemand alpha=d(:,2);

n=d(:,1);

beta=d(:,3);

gamma=d(:,4);

Pmin=d(:,5);

Pmax=d(:,6); DelP=Pd; i=1;

Iteration=i;

Lamda=8.35; % assume lambda L(i,1)=Lamda;

while abs(DelP)>0.00001

P=(Lamda-beta)./(gamma*2);

P=min(P,Pmax); %p=ph if pmax<p//p>pmax //pick pmax bila pmax kecil dri p

P=max(P,Pmin); %p=pl if pmin>p//p<pmin

DelP=Pd-sum(P); Lamda=Lamda+DelP/(sum(1./(2*gamma)));

cost I(:,i)=alpha+(beta.*P)+(gamma.*P.*P);

total Cost_iteration(i,1)=sum(costI(:,i));

Iteration(i,1)=i;

Lamda(i,1)=Lamda;

i=i+1;

end

Cost=alpha+(beta.*P)+(gamma.*P.*P); % Costs totalCost=sum(Cost);

totalPower=sum(P); table(d(:,1),P,Cost,'V',{'Unit' 'Power' 'Cost'})

display(totalCost);

display(totalPower);

figure plot(Iteration,totalCost_iteration)

title('Convergest Graph')

xlabel('Number of Iteration')

ylabel('Cost(RM/h)')

Answer 1

[Stephen23]

cost I(:,i)=alpha+(beta.*P)+(gamma.*P.*P);
%   ^ remove this space character
total Cost_iteration(i,1)=sum(costI(:,i));
%    ^ remove this space character
figure plot(Iteration,totalCost_iteration)
%     ^ replace with comma, semi-colon, or newline

[Stephen23]

Your code seems to have some bugs in it:

• the columns that you assign to variables do not correspond to the comment above the matrix definition (e.g according to the comment, beta is the 4th column, but you extract the 3rd column and assign it to variable beta).
• different number of column names in the comment than number of columns.
• missing alpha.

It is not clear how to fix these.