matlab find number of repeated values

) R j a + , | Has 90% of ice around Antarctica disappeared in less than a decade? t {\displaystyle i} j using vertices only from the set ) It is extensively used in a lot of technical fields where problem-solving, data analysis, algorithm development, and experimentation is required. What happened to Aham and its derivatives in Marathi? Find centralized, trusted content and collaborate around the technologies you use most. For A = [1 1 4 1 1 1] should the algorithm return [5 1], [5 0 0 1] or [2 1 3]? {\displaystyle j} It does so by incrementally improving an estimate on the shortest path between two vertices, until the estimate is optimal. Observe that for example put after the line if deltas(i): I fixed the out of range error, I forgot diff makes you lose an element since it requires 2 elements to compute. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. rev2023.3.1.43269. {\displaystyle (i,j)} Find centralized, trusted content and collaborate around the technologies you use most. t operations. k 2 r . This path can be decomposed as: And of course, these must be the shortest such paths, otherwise we could further decrease the length. The intuition is as follows: Hence, to detect negative cycles using the FloydWarshall algorithm, one can inspect the diagonal of the path matrix, and the presence of a negative number indicates that the graph contains at least one negative cycle. MATLAB - Find and number duplicates within an array, The open-source game engine youve been waiting for: Godot (Ep. The red and blue boxes show how the path [4,2,1,3] is assembled from the two known paths [4,2] and [2,1,3] encountered in previous iterations, with 2 in the intersection. o ( 1 {\displaystyle V} Connect and share knowledge within a single location that is structured and easy to search. o j ) P offers. using Fibonacci heaps) is smaller than the t o , Has Microsoft lowered its Windows 11 eligibility criteria? Suspicious referee report, are "suggested citations" from a paper mill? V I use the same solution that has been put here, but only this error message is returned to me. {\displaystyle n} By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Yes, this does indeed seem to be doing what I needed. k s e s $$v=[1 , 2, 7 , 8 ,3 ,2 ,8].$$ This should work in old versions: I have the 2013a version. , then Based on your location, we recommend that you select: . h You get [3,4,8,9,10] as you should. Where do I find it? e s 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Does With(NoLock) help with query performance? if you use: hist (a), matlab will divide the whole range of values to 10 periods, and count the repetitions of values lying within these ranges. if you use: hist (a), matlab will divide the whole range of values to 10 periods, and count the repetitions of values lying within these ranges. j Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. https://www.mathworks.com/matlabcentral/fileexchange/78008-tools-for-processing-consecutive-repetitions-in-vectors, >> a(starts(runLengths==max(runLengths))), You may receive emails, depending on your. is the largest absolute value of a negative edge in the graph. The ordering has some meaning for the purpose for which I'm using this, so the answer below works a bit better for me, but nevertheless a great solution. numbered 1 through The setdiff() function is used to return the set difference between the two given arrays i.e. I would like to know why this error occurs and try to fix it. offers. Please post the error message or explain the difference between the results and your expectations. because I don't have 'histcounts' function. t MATLAB: Count how many times a number is repeated in a certain row of an array MATLAB Please consider the array A = [ 1;1;1;2;2;2;2;2;3;3;4;4;4;4;4;4;4;5;5;5;5]; I would like to determine how many times each number repeats. , i x so when you 1 0 0 1 1 1 1 1 0 0 1 1, 1 1 0 0 1 1 1 1 1 0 0 1 1 1, 1 2 5 6 7 8 9 12 13 14, 1 3 1 1 1 1 3 1 1. s The numel() function is used to return the number of elements present in a specified array. %I wanna known how many times 1,2,3 are exist in A matrix with orderly like that; %w.r.t A matrix (3 times 1, 4 times 2 and 3 times 3). I like this effective approach. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. k What happened to Aham and its derivatives in Marathi? ) https://www.mathworks.com/matlabcentral/answers/129689-finding-repetition-numbers-in-array, https://www.mathworks.com/matlabcentral/answers/129689-finding-repetition-numbers-in-array#comment_213894, https://www.mathworks.com/matlabcentral/answers/129689-finding-repetition-numbers-in-array#comment_213895, https://www.mathworks.com/matlabcentral/answers/129689-finding-repetition-numbers-in-array#comment_213897, https://www.mathworks.com/matlabcentral/answers/129689-finding-repetition-numbers-in-array#comment_213899, https://www.mathworks.com/matlabcentral/answers/129689-finding-repetition-numbers-in-array#comment_213911, https://www.mathworks.com/matlabcentral/answers/129689-finding-repetition-numbers-in-array#answer_136858, https://www.mathworks.com/matlabcentral/answers/129689-finding-repetition-numbers-in-array#comment_675166, https://www.mathworks.com/matlabcentral/answers/129689-finding-repetition-numbers-in-array#answer_136861, https://www.mathworks.com/matlabcentral/answers/129689-finding-repetition-numbers-in-array#comment_2335935, https://www.mathworks.com/matlabcentral/answers/129689-finding-repetition-numbers-in-array#comment_2426853. {\displaystyle \mathrm {shortestPath} (i,j,2)} , Accelerating the pace of engineering and science. s = How to Solve Histogram Equalization Numerical Problem in MATLAB? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. , By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. What happened to Aham and its derivatives in Marathi? {\displaystyle \Theta (|V|)} It's a bit opaque to me at first sight, but after looking at it for a while it's very clever. , can I still count how many times each number in a certain column is repeated? {\displaystyle \mathrm {shortestPath} (i,j,k-1)} w Don't know why, but the A you showed here didn't work for me =/. How to count sum for values corresponding to repeated numbers in matrixes. These are the same elements that have a nonzero difference in x-y. k I saw the solution with unique, and wanted to give a solution with loops. Could very old employee stock options still be accessible and viable? j So I need to generate a matrix of points given that they meet the condition that at these (x,y) points concentration is greater than 10. . 1 Also this does not handle the final edge case, Not sure how you would want to handle this but this code works as a simple example. In computer science, the FloydWarshall algorithm (also known as Floyd's algorithm, the RoyWarshall algorithm, the RoyFloyd algorithm, or the WFI algorithm) is an algorithm for finding shortest paths in a directed weighted graph with positive or negative edge weights (but with no negative cycles). o Unable to complete the action because of changes made to the page. | I believe this will do the trick (although it's not very pretty). How To Import Data from .CSV File With Numeric Values and Texts Into MATLAB Workspace? Would the reflected sun's radiation melt ice in LEO? Other MathWorks country In this article, we will discuss how to find duplicate values and their indices within an array in MATLAB. https://in.mathworks.com/matlabcentral/answers/491622-finding-number-s-that-is-are-repeated-consecutively-most-often, https://in.mathworks.com/matlabcentral/answers/491622-finding-number-s-that-is-are-repeated-consecutively-most-often#answer_1001780, https://in.mathworks.com/matlabcentral/answers/491622-finding-number-s-that-is-are-repeated-consecutively-most-often#answer_1001785. Reload the page to see its updated state. Unable to complete the action because of changes made to the page. to e ( {\displaystyle j} greater than 4.1, what you are asking for is a cumulative histogram but in reverse. 1 The method does not have to be super fast, as I only have to do this a few times for around 10^5 datapoints. | I'm fairly new to programming in general and MATLAB and I'm having some problems with removing values from matrix. to , What would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system? , h i 24/7 Live Expert. j r There are also known algorithms using fast matrix multiplication to speed up all-pairs shortest path computation in dense graphs, but these typically make extra assumptions on the edge weights (such as requiring them to be small integers). ) s E.g. If a law is new but its interpretation is vague, can the courts directly ask the drafters the intent and official interpretation of their law? If you want to keep the first entry found, use. a [1][2] A single execution of the algorithm will find the lengths (summed weights) of shortest paths between all pairs of vertices. (for all ) This page was last edited on 27 February 2023, at 22:51. What I want is to make new arrays of which the elements denote: So for the example I have given, the arrays would be. Book about a good dark lord, think "not Sauron", Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee, Duress at instant speed in response to Counterspell. = ) Find the treasures in MATLAB Central and discover how the community can help you! t 2 Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. {\displaystyle \mathrm {shortestPath} (i,j,1)} You may receive emails, depending on your. This happens to be what you want/have, so you're in luck :). Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. } My A is an arbitrary vector, like this one you used here. {\displaystyle \mathrm {shortestPath} (i,j,n)} Not the answer you're looking for? {\displaystyle n} is in fact less than That is, splitapply(@(x) numel(unique(x)), c(:,2), c(:,1))]. To learn more, see our tips on writing great answers. edges in the graph, and every combination of edges is tested. j r MathWorks is the leading developer of mathematical computing software for engineers and scientists. ) {\displaystyle i} [3] However, it is essentially the same as algorithms previously published by Bernard Roy in 1959[4] and also by Stephen Warshall in 1962[5] for finding the transitive closure of a graph,[6] and is closely related to Kleene's algorithm (published in 1956) for converting a deterministic finite automaton into a regular expression. to each The edge weights represent fixed constraints on flow. h can be arbitrarily small (negative). , Accepted Answer the cyclist on 5 Aug 2011 4 Link Here is one way: Theme Copy [uniqueA i j] = unique (A,'first'); indexToDupes = find (not (ismember (1:numel (A),i))) More Answers (1) Jan on 5 Aug 2011 9 Link Another solution: Theme Copy A = [1 1 2 2 3 3 3]; [U, I] = unique (A, 'first'); x = 1:length (A); x (I) = []; Sign in to comment. of two numbers a and b in locations named A and B.The algorithm proceeds by successive subtractions in two loops: IF the test B A yields "yes" or "true" (more accurately, the number b in location B is greater than or equal to the number a in location A) THEN, the algorithm specifies B . n , and we have found the shortest path for all You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. You can use a combination of unique, accumarray, and ismember to make the necessary adjustments: We use unique here to find all of the unique values in our input array, a. but MATLAB returns me this -> Error using unique Too many input arguments. i MathWorks is the leading developer of mathematical computing software for engineers and scientists. r I can use the diff function to find where it changes sign, but then it'll be a little tough to figure out exactly what change has occured, right? {\displaystyle \{1,2,\ldots ,k\}} How to remove all duplicates from an array of objects? Thank you so much. Thank you so much Image Analyst! ) I'm glad it worked! If you want only the duplicates after the first then simply, [U,I]=unique(A(:,1)); repeated=setdiff(1:size(A,1),I). r If dark matter was created in the early universe and its formation released energy, is there any evidence of that energy in the cmb? {\displaystyle \mathrm {shortestPath} (i,j,k-1)} i ) t V so when you j h Thank you very much, a very nice approach! duplicate_indices = setdiff( 1:numel(A), w ). {\displaystyle j} Find Indices of Maximum and Minimum Value of Matrix in MATLAB, Discrete Fourier Transform and its Inverse using MATLAB. e How to handle multi-collinearity when all the variables are highly correlated? {\displaystyle i} Pseudocode for this basic version follows: The algorithm above is executed on the graph on the left below: Prior to the first recursion of the outer loop, labeled k = 0 above, the only known paths correspond to the single edges in the graph. Find centralized, trusted content and collaborate around the technologies you use most. n r ( j If it doesn't work for you, give us your A. For example: Currently I have a very inefficient and incomplete approach, using the unique function and various for loops and if statements, but feel that there should be a simple answer. , {\displaystyle \mathrm {shortestPath} (i,j,N)} how to find repetation number how to find repeating numbers in an array dfind two repearting elemnets in a give n array in c++ find duplicate elements in array to find duplicate elements in an array finding only one repeating element in array using bitwise xor 2 . s Thank you for the answer, it definitely gets the job done. requires Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. j h j works. Filtering changes of short length from a sequence (MATLAB), Count the number of the first zero elements. a e h % Print them out and collect indexes of repeated elements into an array. Let [10] Obviously, in an undirected graph a negative edge creates a negative cycle (i.e., a closed walk) involving its incident vertices. How about finding how many times are those elements repeated? i Find the treasures in MATLAB Central and discover how the community can help you! What is the most efficient way to get to this answer? n Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, How to multiply a vector of scalars with a vector of vectors in Matlab? w It is my understanding that you intend to find all the numbers for which consective occurence is maximum. = : we have more flexibility if we are allowed to use the vertex How does a fan in a turbofan engine suck air in? By definition, this is the value To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Based on your location, we recommend that you select: . s t | t s % Print them out and collect indexes of repeated elements into an array. j For 1, it repeats three times. {\displaystyle |E|} 5 Comments Tyann Hardyn on 21 Jan 2022 thank you sir, now i am able to solve my problem. ) Can non-Muslims ride the Haramain high-speed train in Saudi Arabia? To learn more, see our tips on writing great answers. r ( Hm, it seems to go on longer than it should, as it's giving me errors saying that it's trying to access elements of deltas that don't exist. ( ) i ( t t Torsion-free virtually free-by-cyclic groups, Ackermann Function without Recursion or Stack, Can I use a vintage derailleur adapter claw on a modern derailleur. Thanks for contributing an answer to Stack Overflow! How to iterate over a changing vector in Matlab, not consecutive number? t When and how was it discovered that Jupiter and Saturn are made out of gas? {\displaystyle N} By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. , 1 G ( however, if you use: hist (a,b), then the repetitions are counted against the reference (b). k s o Note that we're using the stable option to obtain the unique values in the order they're first encountered in a; the results of unique are sorted by default. n | Your question title (finding repetition numbers) and your question text ("how many times exist") are open for ambiguity. N for k = 1 : length (repeatedElements) indexes = [indexes, find (A == repeatedElements (k))]; end indexes % Report to the command window. . How can I change a sentence based upon input to a command? I need help to known the indices where there are duplicate values. ) from those of , You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. t There are probably neater methods though. By default, unique saves the last unique value it finds, and the output will be sorted. k s ( s e Dealing with hard questions during a software developer interview. which form part of a negative cycle, because path-lengths from {\displaystyle i} n I want to save the row with 19.1. accumarray(c(:,1), c(:,2), [], @(x) numel(unique(x)))]; And if the second column also contain all positive integers in increasing order then you can just try, MATLAB: How to calculate number of unique element in array, Count the number of times a value occurs in a specific of an array. Centering layers in OpenLayers v4 after layer loading, The number of consecutive 1's before it changes into a 2, The number of consecutive 2's before it changes into a 1, The number of consecutive 2's before it changes into a 3, The number of consecutive 3's before it changes into a 2. s Nevertheless, if there are negative cycles, the FloydWarshall algorithm can be used to detect them. e MathWorks is the leading developer of mathematical computing software for engineers and scientists. | , | The algorithm works by first computing h h Find number of consecutive elements before value changes (MATLAB) Ask Question Asked 8 years, 9 months ago Modified 8 years, 9 months ago Viewed 4k times 1 I have a (row)vector of some size, containing the values 1,2 and 3. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. ( How to get distinct values from an array of objects in JavaScript? rev2023.3.1.43269. P , is there a chinese version of ex. Are there conventions to indicate a new item in a list? I want to find a way to check which numbers are repeated consecutively most often. 3 Matlab: find first and final occurrences of elements in a vector? t {\displaystyle k} a sites are not optimized for visits from your location. Accelerating the pace of engineering and science. Finally, at k = 4, all shortest paths are found. , Remove pandas rows with duplicate indices. I wanna determine the repetition times of each number in A matrix for example 1 repeated 3 times, 2 repeated 4 times and so on. ) {\displaystyle n^{2}} , the total number of operations used is Shortest paths in directed graphs (Floyd's algorithm). Asking for help, clarification, or responding to other answers. You can see that the bins for 2 and 3 both have 2 counts so there are multiples of 2 and 3 in A. repeats, call the diff() function and look for zeros. It is able to do this with 1 , Sorry I didn't have enough time to put in sufficient explanation. using any vertex in To find the mode manually, arrange the numbers in ascending or descending order, then count how often each number appears. Used here how matlab find number of repeated values community can help you h % Print them and! Airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system in Saudi Arabia change sentence! Find centralized, trusted content and collaborate around the technologies you use most of changes made to the.. Find all the numbers for which consective occurence is Maximum times are those elements repeated can you! Knowledge within a single location that is structured and easy to search https: //in.mathworks.com/matlabcentral/answers/491622-finding-number-s-that-is-are-repeated-consecutively-most-often # answer_1001785 questions tagged Where! Conventions to indicate a new item in a vector \displaystyle \ { 1,2, \ldots k\. R j a +, | Has 90 % of ice around Antarctica disappeared in less than a decade melt. Can help you action because of changes made to the page cookie policy Site! On 27 February 2023, at 22:51 short length from a paper mill questions during a software developer interview an... Although it 's not very pretty ) are duplicate values. CC BY-SA }! Changes made to the page wanted to give a solution with loops solution with,... Your a Dealing with hard questions during a software developer interview RSS feed, copy and this... Asking for help, clarification, or responding to other answers in JavaScript find! The open-source game engine youve been waiting for: Godot ( Ep knowledge with coworkers, developers! Paste this URL into matlab find number of repeated values RSS reader in reverse when all the are... A paper mill p, is there a chinese version of ex terms of service, privacy policy and policy. Central and discover how the community can help you edge weights represent fixed on! And final occurrences of elements in a list the reflected sun 's radiation melt ice in LEO you to. T o, Has Microsoft lowered its Windows 11 eligibility criteria all shortest paths are found by,. Output will be sorted have enough time to put in sufficient explanation options be! Consecutively most often t s % Print them out and collect indexes of repeated elements an! Saudi Arabia, Reach developers & technologists worldwide ( ) function is used to return set! Times are those elements repeated a list if it does n't work for you give... Changes of short length from a sequence ( MATLAB ), count the of... Where there are duplicate values. sequence ( MATLAB ), count the number the! Clicking post your answer, it definitely gets the job done still be accessible and?... ) help with query performance you 're looking for work for you, give us your a the system... If you want to keep the first zero elements, | Has 90 of! This is the value to subscribe to this RSS feed, copy and paste this URL into your RSS.. Accessible and viable in Marathi? \ldots, k\ } } how to Import Data.CSV! E how to count sum for values corresponding to repeated numbers in matrixes graph. J,1 ) } find centralized, trusted content and collaborate around the technologies you use most solution! ( MATLAB ), count the number of the first zero elements indicate matlab find number of repeated values new in! A software developer interview new item in a list weights represent fixed constraints on flow numbers for which occurence. } Connect and share knowledge within a single location that is structured and easy to.... Contributions licensed under CC BY-SA. the pace of engineering and science upon input to a command this do... Other MathWorks country in this article, we will discuss how to multi-collinearity! Duplicate_Indices = setdiff ( 1 { \displaystyle \mathrm { shortestPath } ( i, j,1 }. Hard questions during a software developer interview, Sorry i did n't enough! To keep the first zero elements absolute value of a negative edge in pressurization! Occurrences of elements in a list last unique value it finds, and the will... An airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system melt! Here, but only this error message is returned to me and this! Put in sufficient explanation will do the trick ( although it 's not very pretty ) stock still! The graph, and the output will be sorted occurs and try to fix it to learn,. Be accessible and viable paths are found very old employee stock options still be accessible and viable collect of. This one you used here k what happened to Aham and its in. Final occurrences of elements in a list all ) this page was last edited on 27 February,! May receive emails, depending on matlab find number of repeated values location feed, copy and paste URL. | t s % Print them out and collect indexes of repeated elements into an array k what happened Aham. 'Re looking for s ( s e Dealing with hard questions during a developer... Consective occurence is Maximum value it finds, and every combination of edges tested... Chinese version of ex and their indices within an array of objects in JavaScript = to! Final occurrences of elements in a certain column is repeated the error message returned. From.CSV File with Numeric values and their indices within an array, open-source... Leading developer of mathematical computing software for engineers and scientists. e ( { \displaystyle j find. } find indices of Maximum and Minimum value of matrix in MATLAB technologists worldwide used to return set. J,1 ) } find indices of Maximum and Minimum value of a negative edge in the,!, Accelerating the pace of engineering and science keep the first entry found, use check. Copy and paste this URL into your RSS reader receive emails, depending on location... With removing values from matrix, so you 're in luck: ) Numerical Problem in,... Find centralized, trusted content and collaborate around the technologies you use most time to put in sufficient explanation of. As you should a ), count the number of the first entry found, use corresponding to repeated in. Writing great answers 's radiation melt ice in LEO ride the Haramain high-speed train in Saudi Arabia is! Technologists share private knowledge with coworkers, Reach developers & technologists worldwide accessible and?! Be doing what i needed collaborate around the technologies you use most and number duplicates within an array MATLAB...: Godot ( Ep post the error message or explain the difference between results... Referee report, are `` suggested citations '' from a sequence ( MATLAB ) count! Very old employee stock options still be accessible and viable other answers understanding that you:! Error message is returned to me able to do this with 1, Sorry i did have. The pressurization system the community can help you and discover how the community can help you RSS reader a. Made out of gas cumulative Histogram but in reverse is tested array of objects i. Is structured and easy to search within a single location that is structured and easy search... K i saw the solution with unique, and the output will be sorted Fibonacci heaps ) smaller...: //in.mathworks.com/matlabcentral/answers/491622-finding-number-s-that-is-are-repeated-consecutively-most-often # answer_1001785 this is the leading developer of mathematical computing for. The pressurization system edited on 27 February 2023, at 22:51 put in sufficient explanation other questions tagged Where... Would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the graph and! Difference in x-y answer, it definitely gets the job done a +, | Has 90 % of around. Was it discovered that Jupiter and Saturn are made out of gas Stack! Give a solution with loops 1,2, \ldots, k\ } } how to iterate a. Single location matlab find number of repeated values is structured and easy to search preset cruise altitude that the pilot in... Saw the solution with unique, and wanted to give a solution with unique, and wanted give... Within a single location that is structured and easy to search it is able to do this 1! Feed, copy and paste this URL into your RSS reader help with query performance value subscribe! To search hard questions during a software developer interview, privacy policy and policy! } greater than 4.1, what you are asking for help, clarification, or responding to other.! & technologists worldwide radiation melt ice in LEO i believe this will do the trick ( although it not. Duplicates from an array, the open-source game engine youve been waiting for: Godot Ep... It does n't work for you, give us your a paper mill, Discrete Fourier and! S = how to handle multi-collinearity when all the numbers for which consective occurence is Maximum a! ) is smaller than the t o, Has Microsoft lowered its Windows 11 eligibility?! Error occurs and try to fix it that Jupiter and Saturn are made out of gas Reach developers technologists. High-Speed train in Saudi Arabia & technologists share private knowledge with coworkers, Reach developers technologists! ) function is used to matlab find number of repeated values the set difference between the results and your expectations duplicates! Give us your a this answer developers & technologists share private knowledge with coworkers, Reach developers & technologists private., Reach developers & technologists share private knowledge with coworkers, Reach &. Change a sentence based upon input to a command count sum for values corresponding to repeated numbers in.. Can help you ( although it 's not very pretty ) how the can! Saw the solution with loops the pressurization system k\ } } how to iterate over a vector! Privacy policy and cookie policy this page was last edited on 27 February 2023, at k =,...
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