MATLAB: How to create an array of randomized pairs of numbers

arrayscolor

So I am working on creating a version of the memory card game where you have say a 4×4 array of tiles, and each one has a matching pair within the array. I am using 8 different colors and 2 tiles for each color. How could I create a random 4×4 array that would only contain the numbers 1 through 8 but each one only 2 times? I assume I'd use randi. I know my title is quite confusing but I couldn't think of an easier description without telling why I needed it. Thank you!

Best Answer

tiles = [1:8, 1:8];
tiles = reshape( tiles(randperm(length(tiles))), 4, 4);

Related Solutions

MATLAB: Random grouping of users and subcarriers

Change this line

G = rand(s,p)

to this

G=[randsample(N_SC(r),1) randsample(N_UE(p),1)]

MATLAB: How grouping of users can be done

Is this what you want?

numUsers = 50;
N_UE = 1 : numUsers
% Get a scrambled array
s = N_UE(randperm(length(N_UE)))
numGroups = 5; % Need to divide s up into 5 groups
divisions = sort(randperm(numUsers-2, numGroups-1) + 1, 'ascend')
divisions = [0, divisions, numUsers]
% Create cell array with random number of users in each groups
groups = cell(1, numGroups);
for k = 1 : numGroups
  indexes = divisions(k)+1:divisions(k+1);
  % Assign users to the kth group:
  usersInThisGroups = length(indexes);
  fprintf('Assigning %d users (indexes %d to %d) to group %d.\n', ...
    usersInThisGroups, divisions(k)+1,divisions(k+1), k);
  groups{k} = s(indexes);
end
celldisp(groups); % Display groups in command window.

You'll see

Assigning 19 users (indexes 1 to 19) to group 1.
Assigning 5 users (indexes 20 to 24) to group 2.
Assigning 7 users (indexes 25 to 31) to group 3.
Assigning 9 users (indexes 32 to 40) to group 4.
Assigning 10 users (indexes 41 to 50) to group 5.
groups{1} =
  20    17    10    12     4     9    32    13    50    49    23    15    41    26    37    28     6    47    43
groups{2} =
  22    31     7    35    29
groups{3} =
  18    11     8    44    42    38    46
groups{4} =
  30    36    33    24    19     2    45     5    34
groups{5} =
  21     1    16    39    14    27    48    40     3    25

You have 5 groups and in each group is a random number of users chosen from the entire group of 50 users. The users in each group are randomly chosen (not sequentially taken) from the larger, entire group of 50. Every user is in exactly one and only one group, and no user is missing. Change numUsers and numGroups as needed for your situation.

Best Answer

Related Solutions

MATLAB: Random grouping of users and subcarriers

MATLAB: How grouping of users can be done

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