# matlab unique combinations

I am aware that this sort of question has been asked many times over, but all queries seem to seek combinations of (row) vectors. Matlab find unique column-combinations in matrix and , Matlab find unique column-combinations in matrix Learn more about indexing, unique, combinations. 0. Creating combination matrix of all combinations. boxchart(___,'GroupByColor',cgroupdata) uses color to differentiate between box charts.The software groups the data in the vector ydata according to the unique value combinations in xgroupdata (if specified) and cgroupdata, and plots each group of data as a separate box chart.The vector cgroupdata then determines the color of each box chart. When I work this out manually I get these combinations: 5 6 2 . A can be a cell array of strings. It’s very effective but does take a few steps to perform. The rules are you can't have the same necklace forwards and backwards, and you can't have the same necklace with one bead being slid around to the other end. 0 ⋮ Vote. Given a cell array that consists of several matrices of various sizes, I'd like to find all unique combinations of these matrices. The resulting vector is sorted in ascending order. Learn more about matlab MATLAB b = unique(A) returns the same values as in A but with no repetitions. Given the size of the set, it is not feasible to simply use combnk or nchoosek to generate all possible combinations, and select randomly from those.. Is there an easy way to generate a unique random subset of M of those combinations? We can use the bijection mentioned in the wikipedia article, which maps combinations without repetition of type n+k-1 choose k to k-multicombinations of size n. We generate the combinations without repetition and map them using bsxfun(@minus, nchoosek(1:n+k-1,k), 0:k-1);. Ask Question Asked 3 years, 8 months ago. This results in the following function: So I'm writing a program to determine the unique combinations of a beaded necklace, but I can't seem to get it right. Matlab find unique column-combinations in matrix and respective index. I would like to generate all the possible combinations of the elements of a given number of vectors. Number of unique combinations from sets: Daniel: 5/6/08 8:20 PM : Hello, I'm looking for a fast method of finding all of the unique combinations of sets of elements (assuming that all sets are the same). b = unique(A, 'rows') returns the unique rows of A. Learn more about combvec, vector, combinations, permutations MATLAB I want to create a cell array based on the content in the two first columns, more precise i want each cell to contain all values in column 3 that has the same values in column 1 and 2. Follow 257 views (last 30 days) Benvaulter on 22 Mar 2017. Create all unique combination with a vector array. Matlab find unique column-combinations in matrix and respective index. Given a cell array that consists of several matrices of various sizes, I'd like to find all unique combinations of these matrices. Let’s assume we have all our tables into Power Query, without the Join helper columns. Syntax. Active 3 years, 8 months ago. MATLAB: Unique combinations of matrices. MATLAB: Find a subset of unique permutations. perms unique. Edited: Jan on 23 Mar 2017 Accepted Answer: Guillaume. Learn more about combination, permutation MATLAB Vote. Learn more about creating matrix of unique combinations of variables Caution: The number of combinations and permutations increases rapidly with n and r!. This MATLAB function returns a matrix containing all permutations of the elements of vector v in reverse lexicographic order. For example, for [1 2], [1 2] and [4 5] I want to generate the elements: [1 1 4; 1 1 5; 1 2 4; 1 2 5; 2 1 4; 2 1 5; 2 2 4; 2 2 5] The problem is that I don't know the number of vectors for which I need to calculate the combinations. Learn more about matlab, array, combination, within, unique, order, vector All possible combinations of 2 vectors.. I've attached some pictures to clarify. b = unique(A) b = unique(A, 'rows') [b, m, n] = unique(...) Description. Produce All Unique Combinations – Using A Formula. For example, if A has five elements: A = [5 6 2 4 7]; one combination of three elements in A is [5 6 2], another combination is [5 6 4], and so on. Previous method to produce all possible combinations was my first approach. MATLAB Function Reference : unique. allcomb array combinations matrices. Hi, it would be nice to have some code to work with included. See the expression argument to the options command for details on how to do this. I need to select random combinations of k elements from a set of n elements, where n can be fairly large. To give an example by contrast, the Matlab File Exchange file 'allcomb' generates all unique combinations of sets … combos = combntns (set,subset) returns a matrix whose rows are the various combinations that can be taken of the elements of the vector set of length subset. Learn more about combvec, vector, combinations, permutations MATLAB To use values of n above about 45, you will need to increase R's recursion limit. I am aware that this sort of question has been asked many times over, but all queries seem to seek combinations of (row) vectors. Input is your data and output is array of all possible combinations. All possible combinations of 0's and 1's. Viewed 496 times 0. This MATLAB function returns a matrix containing all permutations of the elements of vector v in reverse lexicographic order. Learn more about combvec, vector, combinations, permutations MATLAB Above all, it involves unnecessary helper columns. This MATLAB function returns a table or dataset array with the means for the data groups specified in tbl determined by the values of the grouping variable or variables specified in groupvar. Look at perms function. For any given A, I'd like to find all the unique sets of three elements of A. But this is actually thing you would easily solve with MatLab help. I have many arrays A of varying length. Find unique elements of vector. You can achieve the same using a formula. Learn more about combinations Number of unique combinations from sets Showing 1-12 of 12 messages. Is your data and output is array of all combinations reverse lexicographic order easily solve with help. Was my first approach permutations of the elements of a given number of combinations and permutations rapidly... 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