check repeated values in a cell

Hello,

I have a cell with 90 elements in it.

in that, after 7th element all values are same.

I have to limit the repeatability for 3 times only. that is each set (3 times) of repeated values have to do some particular operation.

kindly help.

Code is too lenghty to attach here. this is my cell which i mentioned about.

24

1

1

2

2

2

3

3

3

3

3

3

3

3

3

3

3

3

3

Answer 1

[Rahul]

Hi @NETHRAVATHI S,

I understand that you wish to limit the count of repeating elemets in your cell array to a maximum of 3 and then do some operations on that cell array.

• To achieve the desired result, you can use convert the cell array to a matrix using 'cell2mat' function.

• Then you can use functions like 'unique' and 'accumarray' to find the unique elements of the array and their respective counts.

• Then using a loop, all the elements can be appended to an array with the maximum count of the repeating elements to be 3 using the function 'repmat'. Here is an example:

% I have taken 'uniqueData' as the array obtained after using the 'unique' function
% I have taken 'counts' as the array obtained after using 'accumarray' function

output = {};

for i = 1:length(uniqueData)
    
    element = uniqueData(i);
    count = counts(i);
    
    % Append limited elements to output
    output = [output, repmat({element}, 1, min(count, 3))];
    
end

You can check this MATLAB answer: https://www.mathworks.com/matlabcentral/answers/336500-finding-the-indices-of-duplicate-values-in-one-array

You can also refer to the following MathWorks documentations to knwo more about these functions:

'cell2mat': https://www.mathworks.com/help/releases/R2021a/matlab/ref/cell2mat.html

'unique': https://www.mathworks.com/help/releases/R2021a/matlab/ref/double.unique.html

'accumarray': https://www.mathworks.com/help/releases/R2024a/matlab/ref/accumarray.html

'repmat': https://www.mathworks.com/help/releases/R2021a/matlab/ref/repmat.html

Hope this helps! Thanks.