select random numbers from a group

I had number of EV in different time stamp in each time, and a group of their battery capacity and type of it. first randomly divide number of EVs in 2nd column as

for i=1:24
    N_EV(i)= randi(15,1,1); % not more than 15
end

Now I had Cap=[2,4,6];

so for each EVs , select a random Cap from this Cap as shown in 4th column,

Then based on logic in 6th column based on Cap value define their type of EVs

[Sriram Tadavarty]

Whats your question here? Can you update the question with the data set, the code you tried, place where you struck or getting incorrect outputs?

Answer 1

[the cyclist]

I think I understand at least part of your question.

Do you have the Statistics and Machine Learning Toolbox? If so, then to select 4 EV from set of Caps [2,4,6], you can do

randsample([2,4,6],4)

[mukesh meharda]

thanks for your help and I solved it as below that I need......

    B_Cap =  [2;4;6];
for i=1:24
    N_EV(i)= randi(15,1,1);
end
 cell=cell(24,1);
for i=1:24
    for j=1:N_EV(i)
    pos(j) = randi(length(B_Cap));
    cap(j) = B_Cap(pos(j));      % capacity selection for each EVs
    end
    cell{i,1} = cap; 
    pos=[];
    cap=[];
end
% SoCi defining for each EVs based on their type
for i=1:24
     for j=1:N_EV(i)
      if cell{i,1}(j)==2
          cell{i,2}(j)=0.2;   %if 2W then SoCi
      else if cell{i,1}(j) ==6
              cell{i,2}(j)= 0.3; %if 3W then SoCi
       else   cell{i,2}(j)= 0.25; %if eR then SoCi          
       end
      end
     end
end

[the cyclist]

I'm glad you found a solution.

I strongly recommend against using cell as a variable name, since it is a MATLAB function. This is a very confusing line of code:

cell=cell(24,1);

for anyone trying to understand what you are doing, and is also prevents future use of cell() as a function.

It's better to give that variable a meaningful name.