MATLAB: Remove Duplicates from Cell Array

MATLAB

Hello there, if I have a cell array as following:

in which the first column is constructed of type 'char' for each element, how can I extract this first col. without duplicates?

Thanks in Advance

Best Answer

You can use unique()

C; % your cell array
country_names = unique(C(:,1))

Related Solutions

MATLAB: Find unique or duplicate cells in cell array of chars

A = {{'A', 'B', 'C'}, {'C', 'D', 'E'}, {'A', 'B', 'C'}, {'C', 'B', 'A'}}
N = arrayfun(@(k) sum(arrayfun(@(j) isequal(A{k}, A{j}), 1:numel(A))), 1:numel(A))
unique_elements = A(N==1)
duplicated_elements = A(N>1)

MATLAB: Is it possible to use the UNIQUE function with cell arrays containing empty cells in MATLAB 7.9 (R2009b)

The ability to process empty cells directly with the UNIQUE function is not available in MATLAB 7.9 (R2009b).

As a workaround, you can identify which cells are not empty with the CELLFUN function:

c = {'hello', 'world', [], 'hello', 'MATLAB'}
~cellfun(@isempty, c)

Then use this logical array to index into the original cell array in order to call UNIQUE on only the elements of the cell array which are not empty:

unique(c(~cellfun(@isempty, c)))

Best Answer

Related Solutions

MATLAB: Find unique or duplicate cells in cell array of chars

MATLAB: Is it possible to use the UNIQUE function with cell arrays containing empty cells in MATLAB 7.9 (R2009b)

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