How to add values to an array and how to add values to a table without overlapping them

I want to make an array of random values.

just put the value in the array but it just gets overwritten, I want to add a value to a random array to create an array what functions are there?

And in that arrangement, I want to put it in the table as a value

How do I create a table in order of values in an array without overlapping values?

Answer 1

[Shivam]

Hi 주영,

You can use the random function e.g. randi to generate a random number and keep appending that number into an array for certain number of iterations.

% Initial empty array
randomArray = [];

% Append random values to the array for 10 iterations
for i = 1:10 
    newValue = randi(100);  % Random integer between 1 and 100
    randomArray = [randomArray, newValue];  % Append to the array
end

Also, use the unique function to remove duplicates from the array.

uniqueArray = unique(randomArray);

Post this, you can convert the array into a MATLAB table using array2table function:

T = array2table(uniqueArray', 'VariableNames', {'RandomValues'});

% Display the table
disp(T);

    RandomValues
    ____________

         16     
         33     
         35     
         50     
         53     
         56     
         61     
         83     
         85     

You can visit these documentation links of randi, unique and array2table function to know more:

• https://www.mathworks.com/help/matlab/ref/randi.html
• https://www.mathworks.com/help/matlab/ref/double.unique.html
• https://www.mathworks.com/help/matlab/ref/array2table.html

I hope it helps you achieve the desired behaviour.

Thanks

[Stephen23]

"You can use the random function e.g. randi to generate a random number and keep appending that number into an array for certain number of iterations."

Doing this in a loop and expanding the output array on each iteration is very inefficient. Much better:

https://www.mathworks.com/help/matlab/matlab_prog/preallocating-arrays.html

Best would be to generate them all at once in an array of the correct size:

randi(100,1,10)

ans = 1x10

96 97 69 27 55 46 57 44 59 90

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"Also, use the unique function to remove duplicates from the array."

Thus leaving an unknown number of values. Use RANDPERM if duplicates must be excluded:

randperm(100,10)

ans = 1x10

81 75 100 71 27 18 49 96 76 14

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