I have a table with four columns and roughly 45,000 rows (example below). Or you could upload it to a cloud service (e.g. You could upload it and remove it after I confirm that I received it. 1. remove duplicate rows from a matrix - MATLAB Answers - MATLAB Central remove duplicate rows from a matrix 83 views (last 30 days) Show older comments Ananya Malik on 16 Aug 2016 0 Link Commented: Walter Roberson on 14 Aug 2020 Accepted Answer: Thorsten I have a matrix of the form Re: Remove PivotTable Duplicate Row Labels. I'm getting the below message. and nothings seems to work. rowNum1 = arrayfun(@(i) {find(testID==i & abs(T.col4-0.25)<0.00001, 2)}, unique(testID)); rowNum2 = arrayfun(@(i) {find(testID==i & abs(T.col4-0.50)<0.00001, 2)}, unique(testID)); % ---> ---> ---> ---> ---> ---> ---> ---> ^^^^^^^^^^^^^^^^^^^^^^^. The demo removes the first line where column 4 equals 0.25 or 0.50 for each test. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. What am I doing wrong? {'B'} 0.54688 0.84913 0.25 Sorry my mistake. Another option is to filter out the duplicate rows in the data during query. Sign in to comment. I sorted rowNum1 and got back this. {'A'} 0.90579 0.42176 0.25 Second, those trailing 0s are suspicious. For every statistical test the values in the 4th column are duplicated (at .25 and 0.5). To omit any rows in a table that are duplicated, use the unique function. matlab: duplicate rows removal [duplicate]. Logic works more simply without having to not subset that grouping (the mess about the complicated indexing expression for. You could upload it and remove it after I confirm that I received it. The mathwork contact button does not support uploads. To my eyes anyways, the above data are all for the same test for the first three and then the second set of three; but the fourth column data values are unique other than by happenstance it appears that the last @250ms is same in second and fourth columns as the first @500ms. Is it possible to hide or delete the new Toolbar in 13.1? I ran that second script (adapted below). I'm not sure why I got a different result. I believe Michael wanted all instances of each row that appears multiple times be removed. {'C'} 0.95717 0.39223 0.25 {'B'} 0.95751 0.93399 0.5 "Bonjour" means both good morning and hello. arrays matlab matrix duplicates Remove dublicate rows in long table using matlab Extracting rows from .mat table using for loop in MATLAB fetch in matlab with SELECT using postgreSQL locks table long after completion how to remove only the desired row from the matrix and return the rest rows of a matrix using matlab I double-checked and confirmed this on one duplicate. The 0.25 values for this section are in rows 39 and 40 of the table T. FCL' 0.449377841816944 0.653086728317921 0.242187500000000, FCL' 0.379117217892076 0.705573606598350 0.246093750000000, FCL' 0.411715894798510 0.683829042739315 0.250000000000000, FCL' 0.411715894798510 0.680329917520620 0.250000000000000, FCL' 0.564101287653156 0.573856535866034 0.253906250000000, FCL' 0.794131830628734 0.429142714321420 0.257812500000000, This is the same section after running the code. (I'm presuming the 0.25 and 0.5 are confidence limits of the test and not values of the statistic as Adam presumed below). To remove duplicate rows using the advanced filter, select the whole dataset. It doesn't matter that. Can anyone advise how I delete the first of these rows (the first one of the .25 and the first one of the 0.5 rows) for every statistical test? Also, if there is space/s at the beginning or at the end of these fields, when you filter them out they look the same, however, when you plot a Pivot Table, they appear as separate . Test col2 col3 col4 Dropbox), send the link, and then remove it from the cloud service. ( Hi !) Choose a web site to get translated content where available and see local events and 7. The effect as you demonstrate is what I'm looking for. To omit any rows in a table that are duplicated, use the unique function. > For rowNum1 and 2 the same vales are there. I thought this might be due to the dimensions being different in that the previous code expected two matches/duplicates but this code is open to a variable number of matches? You have removed too much. If I remove duplicates in Excel, 4 rows of data get removed. Duplicate elements Add and remove elements . Find the treasures in MATLAB Central and discover how the community can help you! MathWorks is the leading developer of mathematical computing software for engineers and scientists. Thanks for your help! _____ _______ ________ ____ Moves the rows in the duplicate table back into the original table. Please help, as I already spent some hours trying to fix it myself (I suck at programming.) Not the answer you're looking for? Can anyone advise how I delete the first of these rows (the first one of the .25 and the first one of the 0.5 rows) for every statistical test? {'A'} 0.63236 0.95949 0.5 I want only one data row for same month. indicating which test-names are flagged. Accelerating the pace of engineering and science. (I'm presuming the 0.25 and 0.5 are confidence limits of the test and not values of the statistic as Adam presumed below). your location, we recommend that you select: . What matters is if those values equal 0.25 or 0.50. which would also explain the trailing 0s. Unable to complete the action because of changes made to the page. The question is whether their floating point representation is causing a problem with the equality tests. rowNums4 identifies those that came back negative and I can use this vector to remove those rows. Based on Then you have to identify which rows of the table have those test names. > It shouldn't be a floating point as those numbers represent exact time-stamps, They aren't integers so it's not debatable whether they are represented by floating point or not. I copy a sample of the table below before running this code. The demo removes the first line where column 4 equals 0.25 or 0.50 for each test. (p. paranapariyaN ) 4. MathWorks is the leading developer of mathematical computing software for engineers and scientists. To omit any rows in a table that are duplicated, use the unique function. . Examples of frauds discovered because someone tried to mimic a random sequence, Counterexamples to differentiation under integral sign, revisited. rowNum1 = arrayfun(@(i) {find(testID==i & T.T3==0.25, 1)}, unique(testID)); rowNum2 = arrayfun(@(i) {find(testID==i & T.T3==0.50, 1)}, unique(testID)); First, please see my previous comment which I may have added while you were typing your response (I updated my solution). SeaDek Certified Fabricators are factory trained to specialize in the entire SeaDek process. It is a prety big data set. https://www.mathworks.com/matlabcentral/answers/299722-remove-duplicate-rows-from-a-matrix, https://www.mathworks.com/matlabcentral/answers/299722-remove-duplicate-rows-from-a-matrix#answer_231880, https://www.mathworks.com/matlabcentral/answers/299722-remove-duplicate-rows-from-a-matrix#comment_385554, https://www.mathworks.com/matlabcentral/answers/299722-remove-duplicate-rows-from-a-matrix#comment_972384, https://www.mathworks.com/matlabcentral/answers/299722-remove-duplicate-rows-from-a-matrix#answer_231869, https://www.mathworks.com/matlabcentral/answers/299722-remove-duplicate-rows-from-a-matrix#comment_385526, https://www.mathworks.com/matlabcentral/answers/299722-remove-duplicate-rows-from-a-matrix#comment_385530, https://www.mathworks.com/matlabcentral/answers/299722-remove-duplicate-rows-from-a-matrix#comment_385551, https://www.mathworks.com/matlabcentral/answers/299722-remove-duplicate-rows-from-a-matrix#comment_385555, https://www.mathworks.com/matlabcentral/answers/299722-remove-duplicate-rows-from-a-matrix#comment_385634, https://www.mathworks.com/matlabcentral/answers/299722-remove-duplicate-rows-from-a-matrix#comment_972399, https://www.mathworks.com/matlabcentral/answers/299722-remove-duplicate-rows-from-a-matrix#comment_973188. the post title is misleading - you don't want to remove duplicate rows, you want to remove rows with the same contents, irrespective of order, You may receive emails, depending on your. The 0.25 values for this section are in rows 39 and 40 of the table T. FCL' 0.449377841816944 0.653086728317921 0.242187500000000, FCL' 0.379117217892076 0.705573606598350 0.246093750000000, FCL' 0.411715894798510 0.683829042739315 0.250000000000000, FCL' 0.411715894798510 0.680329917520620 0.250000000000000, FCL' 0.564101287653156 0.573856535866034 0.253906250000000, FCL' 0.794131830628734 0.429142714321420 0.257812500000000, This is the same section after running the code. It will return a logical column vector indicating which test groups do not contain any col4 values less than 0.05. rowNum3 = arrayfun(@(i) {find(testID==i & TableMain.T2<0.50)}, unique(testID)); rowNums4 = cell2mat(cellfun(@isempty,rowNum3)). Can anyone help. Accelerating the pace of engineering and science. The matrix is an example, but generally if two rows have the same value in the first column I have to remove the second one. 5 Most common ways to say hello in French Bonjour (hello, good morning) Salut! How many transistors at minimum do you need to build a general-purpose computer? Should it not be 39, 246, 453, etc? I tried removing ", 2" after <0.05 in the first line but same response. ( Hi ! offers. Check out my Recommended Power Supplies for RTX 3090 Ti GPUs below. Tnew ( [18,20,21],:) = []; size (Tnew) ans = 12 103 8 The table contains information on 103 patients now. It didn't make any change to the table. indicating which test-names are flagged. In, FCL' 0.379117217892076 0.705573606598350 0.246093750000000. Other MathWorks country Remove duplicate rows in table - MATLAB Answers - MATLAB Central Trial software Remove duplicate rows in table Follow 214 views (last 30 days) Show older comments DavidL88 on 20 Jan 2021 0 Commented: DavidL88 on 28 Jan 2021 Accepted Answer: Adam Danz Hi I have a table with four columns and roughly 45,000 rows (example below). Start with A = magic (4) A = 16 2 3 13 5 11 10 8 9 7 6 12 4 14 15 1 Then, delete the second column of A using A (:, 2) = [] This changes matrix A to A = 16 3 13 5 10 8 9 6 12 4 15 1 Thanks. Are you sure they are duplicates? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. It didn't make any change to the table. Connect and share knowledge within a single location that is structured and easy to search. Deletes all rows from the original table that are also located in the duplicate table. I split this column after the second ms and re-ran your code, using the second new column as the test idenifier, so that the two rows are now identified as the same test. I copy a sample of the table below before running this code. Could you attach a mat file containing the table? If ID is the same and within that ID the size = 1 then if there are more than one rows, keep the row that contains the earliest Date for that ID. Excel spreadsheet offers. Should teachers encourage good students to help weaker ones? The above also assumes that A.Size is sorted, if this is not the case in your data you should first sort the Size and then the Date where Size=1 as follows: A = table([1;2;3;3;3;3;4;4;4;5;5;5;5], [ 0;0;0;0;1;1;1;1;1;0;0;1;1]. My original solution removed the first row that contains .25 or .50 in col4 for each test. The tests do not have to be in order. Mathematica cannot find square roots of some matrices? Thanks. It will return a logical column vector indicating which test groups do not contain any col4 values less than 0.05. rowNum3 = arrayfun(@(i) {find(testID==i & TableMain.T2<0.50)}, unique(testID)); rowNums4 = cell2mat(cellfun(@isempty,rowNum3)). I adapted this to my dataset and it seems to erase any row with 0.25 or 0.5. Best 750-1000 Watt PSU. How could my characters be tricked into thinking they are on Mars? I assume this is the right structure. rowNum3 = arrayfun(@(i) {find(testID==i & T.col4<0.50)}, unique(testID)); rmIdx = ismember(T.Test, testNames(idx)); You may receive emails, depending on your. In this post I explain advanced manipulation of locals via macro lists, which allow us to get the number of elements in a local, handle duplicate elements, sort (and shuffle) elements and perform other logical operations. Based on What is this fallacy: Perfection is impossible, therefore imperfection should be overlooked. - rayryeng May 7, 2017 at 19:40 Add a comment 1 Answer Sorted by: 1 You can use any for this purpose as follows: A = A (any (A,2),:); % any (A,2) gives the logical indices of the rows whose at least one element is non-zero Share Improve this answer Follow edited May 7, 2017 at 14:16 {'B'} 0.96489 0.67874 0.5 Choose a web site to get translated content where available and see local events and It returns back exactly A. identical. {'C'} 0.97059 0.74313 0.25 Did the apostolic or early church fathers acknowledge Papal infallibility? Choose a web site to get translated content where available and see local events and It worked perfectly and removed all the duplicate rows. in Untitled4>@(i){find(testID==i&TableMain.T2<0.50)} (line 6), below returns a logical vector the same size as. This the exact code I ran on my table T. T3 is the last column and T4 is the first column. The first column is the name of statistical test (of which there are several hundred different tests). The rubber protection cover does not pass through the hole in the rim. A = [1 2 3 45; 3 2 1 45; 1 4 5 54; 5 4 1 54]; You have a row that begins with 5, but no output row that begins with 5. Remove the first row from the table. MathWorks is the leading developer of mathematical computing software for engineers and scientists. MathWorks est le leader mondial des logiciels de calcul mathmatique pour les ingnieurs et les scientifiques. Delete Rows by Row Number Delete rows 18, 20, and 21 from the table. rowNum1 = arrayfun(@(i) {find(testID==i & T.T3==0.25, 2)}, unique(testID)); rowNum2 = arrayfun(@(i) {find(testID==i & T.T3==0.50, 2)}, unique(testID)); It shouldn't be a floating point as those numbers represent exact time-stamps. To my eyes anyways, the above data are all for the same test for the first three and then the second set of three; but the fourth column data values are unique other than by happenstance it appears that the last @250ms is same in second and fourth columns as the first @500ms. If I remove duplicates in Excel, 4 rows of data get removed. Accepted Answer Why do we use perturbative series if they don't converge? so I want the first row of data for each month. Bonsoir (Good evening) Coucou! {'C'} 0.95717 0.39223 0.25 CGAC2022 Day 10: Help Santa sort presents! I ran that second script (adapted below). Second, those trailing 0s are suspicious. It worked perfectly and removed all the duplicate rows. Drops the duplicate table. To delete duplicate rows on the basis of multiple columns, specify all column names as a list. You can create an intermediate table and use it to remove duplicate rows. Looking through values listed in rowNum1 and 2, both rows in T that match the values 0.25 and 0.5 seem to be identified and are listed. I'm getting the below message. It's expected that they are cell arrays with the same size. I figured it out. Find the treasures in MATLAB Central and discover how the community can help you! There may be some small differences between the values that matlab does not show by default. Working directly with the factory or a Certified Fabricator, SeaDek Certified Installers are factory. {'A'} 0.91338 0.79221 0.5 The first column is the name of statistical test (of which there are several hundred different tests). https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275414, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#answer_602570, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275426, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275483, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275493, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275503, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275633, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275648, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275658, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1276763, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1276863, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1276993, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1280992, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1281157, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1281292, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1281352, https://fr.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1292288. Other MathWorks country B=[A(A.Size==0,:);A([ia+find(A.Size==0,1, I'm guessing the selection on Size==1 is only artificial given no duplicates by inspection. ans = 1 2 3 4 5 6 7 8 The order doesn't matter. I figured it out. If you go to France, the single most common word for hello is " Bonjour ". Tnew ( [18,20,21],:) = []; size (Tnew) ans = 12 103 8 The table contains information on 103 patients now. For example, If floating point representation is causing problems like this, you'll need to modify these two lines of my solution. 'Perm t-test equal [250ms,500ms 92, 108]: Avg: 11_right FCL', 'Perm t-test equal [500ms,900ms 92, 108]: Avg: 11_right FCL'. Once you have successfully selected the table, you will need to click on the Data tab on the top of the screen and then select "Remove Duplicates" in the Data Tools drop-down box as shown below. rmRows = rowNums(2, ~isnan(rowNums(2,:))); Thank you. . {'C'} 0.97059 0.74313 0.25 Delete Rows by Row Number Delete rows 18, 20, and 21 from the table. None get removed using unique () Then you have to identify which rows of the table have those test names. Or you could create a very similar table with dummy-data and make sure that it has the same problem as your table. Please help, as I already spent some hours trying to fix it myself (I suck at programming) and nothings seems to work. I had a question and got an answer yesterday about removing doubling rows in a matrix, and I can't figure out why it omits certain rows in a matrix. A=[317.0000 282.0000 310.0000 259.0000 257.0000 305.0000 294.6667 282.0000, 317.0000 282.0000 309.0000 372.0000 257.0000 305.0000 294.3333 319.6667, 317.0000 282.0000 257.0000 305.0000 310.0000 259.0000 294.6667 282.0000, 317.0000 282.0000 257.0000 305.0000 309.0000 372.0000 294.3333 319.6667, 92.0000 166.0000 55.0000 235.0000 71.0000 173.0000 72.6667 191.3333. {'A'} 0.12699 0.91574 0.25 rowNum1 = arrayfun(@(i) {find(testID==i & abs(T.col4-0.25)<0.00001, 2)}, unique(testID)); rowNum2 = arrayfun(@(i) {find(testID==i & abs(T.col4-0.50)<0.00001, 2)}, unique(testID)); % ---> ---> ---> ---> ---> ---> ---> ---> ^^^^^^^^^^^^^^^^^^^^^^^. remove duplicate rows from a matrix - MATLAB Answers - MATLAB Central remove duplicate rows from a matrix 95 views (last 30 days) Show older comments Ananya Malik on 16 Aug 2016 0 Link Translate Commented: Walter Roberson on 14 Aug 2020 Accepted Answer: Thorsten I have a matrix of the form Can I email you the table rather than uploading it here? It can be done using unique (), length (), setdiff (), and numel () functions that are illustrated below: Using Unique () Unique (A) function is used to return the same data as in the specified array A without any repetitions. In, FCL' 0.379117217892076 0.705573606598350 0.246093750000000. offers. Find the treasures in MATLAB Central and discover how the community can help you! Looking through values listed in rowNum1 and 2, both rows in T that match the values 0.25 and 0.5 seem to be identified and are listed. There is a duplicate of all 0.25 and 0.5s. Now call unique like you did, but use the flag first to grab the first unique: Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. 1 You can use logical indexing: a= [1; 2 ; 3]; b= [ 4; 5; 6 ]; T=table (a,b); rowidx = (T.b <= 5); T = T (~rowidx, :); Which returns: T = 12 table a b _ _ 3 6 Share Follow answered Nov 15, 2017 at 14:46 sco1 12.1k 5 28 46 Add a comment 1 Fast, simple. The effect as you demonstrate is what I'm looking for. Or you could create a very similar table with dummy-data and make sure that it has the same problem as your table. _____ _______ ________ ____ Or maybe you meant that they have the same values as the previous version which would only happen if all tests had duplicates for .25 and .50. Create an intermediate table that has the same structure as the source table and . Then you just sub A2 in for A into dbp's solution. This the exact code I ran on my table T. T3 is the last column and T4 is the first column. Tnew = unique (Tnew); size (Tnew) ans = 12 106 8 unique deleted two duplicate rows. {'C'} 0.15761 0.75774 0 Remove duplicates from table with string, datetime, double 174 views (last 30 days) Show older comments Harry Lindner on 25 Jun 2015 Commented: Sean de Wolski on 26 Jun 2015 Accepted Answer: Sean de Wolski cat.csv The data is attached, also below. warning, if position in the row is important then you dont want this. The Matlab expression B=all (A) is translated into Scilab by B=and (A): If A is a matrix, all (A) is equivalent to all (A,1) in Matlab whereas in Scilab and (A) is a logical AND of all elements of A. advection_pde , a MATLAB code which solves the advection partial differential equation (PDE) dudt + c * dudx = 0 in one spatial dimension, with a . When inspecting gg we see that there are still duplicate rows. Unable to complete the action because of changes made to the page. https://uk.mathworks.com/matlabcentral/answers/494161-removing-rows-duplicates-based-on-a-condition, https://uk.mathworks.com/matlabcentral/answers/494161-removing-rows-duplicates-based-on-a-condition#comment_773145, https://uk.mathworks.com/matlabcentral/answers/494161-removing-rows-duplicates-based-on-a-condition#comment_773148, https://uk.mathworks.com/matlabcentral/answers/494161-removing-rows-duplicates-based-on-a-condition#answer_404121, https://uk.mathworks.com/matlabcentral/answers/494161-removing-rows-duplicates-based-on-a-condition#comment_773204. The solution relies on the Date field being sorted so unique returns the first/lowest dateif possibly not, then sort first. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. remove duplicates missing in excel 365 Hereditary Meaning in Hindi Adjective 1. Then click on Unique Records Only. Remove duplicates from table with string, datetime, double 156 views (last 30 days) Show older comments Harry Lindner on 25 Jun 2015 0 Link Translate Commented: Sean de Wolski on 26 Jun 2015 Accepted Answer: Sean de Wolski cat.csv The data is attached, also below. Choose a web site to get translated content where available and see local events and Could you attach a mat file containing the table? Given that rowNum1 and 2 extracted these cells they should be equal to .25 and .5 exactly? (p. maurusi ) 5. The mathwork contact button does not support uploads. Are you sure they are duplicates? Does not work. informal) All (Hello, used on the phone) Hello in French : Top-20 words and expressions 1 - Bonjour ! Example: a = [1,2; 3,4; 5,6; 1,2; 7,8] a = 1 2 3 4 5 6 1 2 7 8 %. Sorry my mistake. Is there a way to adapt this code to remove any unique test that does not have a value <0.05 in col3? Reload the page to see its updated state. {'A'} 0.90579 0.42176 0.25 sites are not optimized for visits from your location. I've also tried to do it in different ways, for example; [~, III, ~] = unique (M,'first','rows'); %removing double points III = sort (III); pleb = M (III,:); gg=sort (pleb); But they either delete non duplicate data, or delete too few data. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. rev2022.12.11.43106. Should it not be 39, 246, 453, etc? {'B'} 0.96489 0.67874 0.5 If you look at the first example you'll see that in the first column of the duplicate rows the names are slight different (where the ms times are). I'm not sure why I got a different result. Removing duplicate rows (not "unique") - MATLAB Answers - MATLAB Central Removing duplicate rows (not "unique") 153 views (last 30 days) Show older comments Michael Siebold on 4 May 2016 0 Link Translate Answered: GeeTwo on 16 Aug 2022 Accepted Answer: Roger Stafford So in this case the new table would look like this: B = table([1;2;3;3;3;4], [ 0;0;0;0;1;1], [1999;1999;1999;2000;2001;2000]); I can't come up with anything other than a solution involving a nested loop, which will have horrible performance on larger sets of data. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Or maybe you meant that they have the same values as the previous version which would only happen if all tests had duplicates for .25 and .50. Why was USB 1.0 incredibly slow even for its time. {'C'} 0.48538 0.65548 0.33 https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275414, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#answer_602570, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275426, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275483, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275493, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275503, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275633, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275648, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1275658, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1276763, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1276863, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1276993, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1280992, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1281157, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1281292, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1281352, https://www.mathworks.com/matlabcentral/answers/722478-remove-duplicate-rows-in-table#comment_1292288. {'C'} 0.80028 0.17119 0.5. Example 1. Reload the page to see its updated state. Based on Seasonic Prime TX-750 Check Price on Amazon Amazon Affiliate Link. Select your List-Range values. The advantage of using this method is faster ingestion since de . Can I email you the table rather than uploading it here? I sorted rowNum1 and got back this. If I remove duplicates in Excel, 4 rows of data get removed. However, it requires you to have sufficient space available in the database to temporarily build the duplicate table. You may receive emails, depending on your. sites are not optimized for visits from your location. [testID, testNames] = findgroups(T.Test); rowNum1 = arrayfun(@(i) {find(testID==i & T.col4==0.25, 2)}, unique(testID)); rowNum2 = arrayfun(@(i) {find(testID==i & T.col4==0.50, 2)}, unique(testID)); rowNums = cell2mat(cellfun(@(c){padarray(c,[2-numel(c),0],NaN. (p. vanashanugat ) 2. There is a duplicate of all 0.25 and 0.5s. Using the size or count method with pandas. Can a prospective pilot be negated their certification because of too big/small hands? sites are not optimized for visits from your location. Based on I don't see the duplication in the sample dataset? {'B'} 0.2785 0.035712 0.33 > For rowNum1 and 2 the same vales are there. Central limit theorem replacing radical n with n. Can we keep alcoholic beverages indefinitely? Accelerating the pace of engineering and science. {'C'} 0.48538 0.65548 0.33 Test col2 col3 col4 {'A'} 0.63236 0.95949 0.5 Or you could upload it to a cloud service (e.g. For example, If floating point representation is causing problems like this, you'll need to modify these two lines of my solution. Usage Is there a way to adapt this code to remove any unique test that does not have a value <0.05 in col3? rowNum3 = arrayfun(@(i) {find(testID==i & T.col4<0.50)}, unique(testID)); rmIdx = ismember(T.Test, testNames(idx)); You may receive emails, depending on your. tmp3 = []; for i=1:numel (tmp2 (:,1))-1 if tmp2 (i,1) == tmp3 tmp2 (i,:) = []; end tmp3 = tmp2 (i,1); end But all of the methods seem to omit the first row to remove. {'B'} 0.09754 0.65574 0 Sometimes when the cells are stored in different formats within the same column in the raw data, they get duplicated. elegant: T (T.b <= 5,:) = []; Share Follow answered Nov 15, 2017 at 20:45 What matters is if those values equal 0.25 or 0.50. which would also explain the trailing 0s. rowNum3 finds those Tests with a value < 0.05 in T2. What am I doing wrong? Tnew = unique (Tnew); size (Tnew) ans = 12 106 8 unique deleted two duplicate rows. {'C'} 0.80028 0.17119 0.5. count() is similar Message-ID: 1521058742 Example 1 - Remove Duplicate Rows in R Data Frame In this example, we will create a data frame . The duplicate rows remained after running it this time. },5,1),rand(15,1), rand(15,1), repmat([0;.25;.25;.5;.5],3,1), % For each testtype, identify the first row where col4 is .25 and .50. Remove duplicate rows from matrix - MATLAB Answers - MATLAB Central Remove duplicate rows from matrix Show older comments MC on 14 May 2017 Vote 1 Link Translate Edited: Stephen23 on 6 Mar 2022 Accepted Answer: Stephen23 Hello I have a 2xN matrix where each column represent the x and y coordinates of a 2D point. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. Tnew ( [18,20,21],:) = []; size (Tnew) ans = 12 103 8 The table contains information on 103 patients now. Dropbox), send the link, and then remove it from the cloud service. I double-checked and confirmed this on one duplicate. rowNum3 finds those Tests with a value < 0.05 in T2. GeeTwo on 16 Aug 2022 Vote 0 Link Translate %Here's a much cleaner way to do it with 2019a or later! I am trying to remove a column from a matlab table (not a matrix) with the next codes: %remove one for the last column TJNew= removevars (TJClean,5); TJNew= removevars (TJClean,'Prob2'); TJNew= removevars (TJClean,TJClean.Prob2); but I am getting this error: Undefined function or variable 'removevars'. It doesn't matter that. The solution above removes duplicate values (cells) from matrix (and returns a vector), but I need to remove duplicate rows and return a matrix the same matrix without duplicate rows. Unable to complete the action because of changes made to the page. How to delete duplicate rows in SQL Server? [testID, testNames] = findgroups(T.Test); rowNum1 = arrayfun(@(i) {find(testID==i & T.col4==0.25, 2)}, unique(testID)); rowNum2 = arrayfun(@(i) {find(testID==i & T.col4==0.50, 2)}, unique(testID)); rowNums = cell2mat(cellfun(@(c){padarray(c,[2-numel(c),0],NaN. So in this case the new table would look like this: B = table ( [1;2;3;3;3;4], [ 0;0;0;0;1;1], [1999;1999;1999;2000;2001;2000]); B.Properties.VariableNames = {'ID' 'Size' 'Date'}; Thanks! A=unique (A,'rows'); toc Will yield: Theme Copy A = 1 1 0 1 1 1 Therefore, A still contains one instance of each row that was duplicate. %use default tolerance. This is part from MATLAB documentation You can delete rows and columns from a matrix by assigning the empty array [] to those rows or columns. Reload the page to see its updated state. In this article, I'll go over the things you should consider when choosing a power supply for your computer with an Nvidia GeForce RTX 3090 Ti graphics card. How to remove duplicate rows and select first from duplicate I have a data in worksheet where PO column contains the same value and WBS element column contains different value. your location, we recommend that you select: . {'A'} 0.81472 0.14189 0 . (p. paitaRak ) 3. offers. Tnew ( [18,20,21],:) = []; size (Tnew) ans = 12 103 8 The table contains information on 103 patients now. How large do you expect your real data to be? {'B'} 0.2785 0.035712 0.33 In the Advanced Filter window, check on Filter the List, in-Place to filter the dataset in its current location. Remove duplicate rows in table - MATLAB Answers - MATLAB Central Remove duplicate rows in table 211 views (last 30 days) Show older comments DavidL88 on 20 Jan 2021 0 Link Translate Commented: DavidL88 on 28 Jan 2021 Accepted Answer: Adam Danz Hi I have a table with four columns and roughly 45,000 rows (example below). The -local- command is a way of defining macro in Stata. For every statistical test the values in the 4th column are duplicated (at .25 and 0.5). The question is whether their floating point representation is causing a problem with the equality tests. Delete Rows by Row Number Delete rows 18, 20, and 21 from the table. Now the solution only removes the rows if the .25 or .50 is a duplicate within each test. . Solution #2: Handle duplicate rows during query. In this article, we will discuss how to find duplicate values and their indices within an array in MATLAB. > It shouldn't be a floating point as those numbers represent exact time-stamps, They aren't integers so it's not debatable whether they are represented by floating point or not. in Untitled4>@(i){find(testID==i&TableMain.T2<0.50)} (line 6), below returns a logical vector the same size as. Next, go to Data in the Sort & Filte r group and click on Advanced. sites are not optimized for visits from your location. 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 set 'keep=False' in the drop_duplicates() function to remove all the duplicate rows. I adapted this to my dataset and it seems to erase any row with 0.25 or 0.5. your location, we recommend that you select: . {'B'} 0.54688 0.84913 0.25 {'B'} 0.95751 0.93399 0.5 Tnew = unique (Tnew); size (Tnew) ans = 12 106 8 unique deleted two duplicate rows. You will notice that the first row has automatically been deselected. To do so follow the instructions below. rowNum1 = arrayfun(@(i) {find(testID==i & T.T3==0.25, 2)}, unique(testID)); rowNum2 = arrayfun(@(i) {find(testID==i & T.T3==0.50, 2)}, unique(testID)); It shouldn't be a floating point as those numbers represent exact time-stamps. 'Perm t-test equal [250ms,500ms 92, 108]: Avg: 11_right FCL', 'Perm t-test equal [500ms,900ms 92, 108]: Avg: 11_right FCL'. Given that rowNum1 and 2 extracted these cells they should be equal to .25 and .5 exactly? I thought this might be due to the dimensions being different in that the previous code expected two matches/duplicates but this code is open to a variable number of matches? I tried removing ", 2" after <0.05 in the first line but same response. So if none of the cells below in col3 for the 'A' test have a value that is <0.05 then remove all rows for 'A'? Learn more about unique remove duplicates string table double . rowNums4 identifies those that came back negative and I can use this vector to remove those rows. {'A'} 0.91338 0.79221 0.5 Ready to optimize your JavaScript with Rust? ie if (1,2) is different to (2,1). I split this column after the second ms and re-ran your code, using the second new column as the test idenifier, so that the two rows are now identified as the same test. So if none of the cells below in col3 for the 'A' test have a value that is <0.05 then remove all rows for 'A'? Please help to apply the logic. Something can be done or not a fit? {'B'} 0.09754 0.65574 0 This method is simple. For rowNum1 and 2 the same vales are there (both are listed as 648x1 cell same as before with first script (with 39 and 40, the first set of duplicates, listed there too). Refer to the duplicate, but operate on the transpose. The data is attached, also below. [1999;1999;1999;2000;2001;2002;2000;2001;2004;2000;2005;2005;2001]. A = table([1;2;3;3;3;3;4;4;4], [ 0;0;0;0;1;1;1;1;1], [1999;1999;1999;2000;2001;2002;2000;2001;2004]); If ID is the same and within that ID the size = 1 then if there are more than one rows, keep the row that contains the earliest Date for that ID. Unable to complete the action because of changes made to the page. {'C'} 0.15761 0.75774 0 Now the solution only removes the rows if the .25 or .50 is a duplicate within each test. . Tnew = unique (Tnew); size (Tnew) ans = 12 106 8 unique deleted two duplicate rows. This is done by transferring only the unique rows to the newly created table and deleting the original one (with the remaining duplicate rows). Find the treasures in MATLAB Central and discover how the community can help you! It's expected that they are cell arrays with the same size. Not at all clear what is the result wanted from this dataset, to me, anyways contains the test names which can be strings, character vectors, categoricals, or numeric. The tests do not have to be in order. to have the same values in both variables unless the result is an empty array (no matches). Removes count of rows from the beginning of the table, starting at the offset specified. 3million rows x 50 columns. rowNum1 = arrayfun(@(i) {find(testID==i & T.T3==0.25, 1)}, unique(testID)); rowNum2 = arrayfun(@(i) {find(testID==i & T.T3==0.50, 1)}, unique(testID)); First, please see my previous comment which I may have added while you were typing your response (I updated my solution). Certified Fabricators digitally pattern boats, create CAD drawings, cut SeaDek PE/EVA material using CNC technology, and install the finished products. {'A'} 0.81472 0.14189 0 To omit any rows in a table that are duplicated, use the unique function. Other MathWorks country Find the treasures in MATLAB Central and discover how the community can help you! Reload the page to see its updated state. Start Hunting! My original solution removed the first row that contains .25 or .50 in col4 for each test. For rowNum1 and 2 the same vales are there (both are listed as 648x1 cell same as before with first script (with 39 and 40, the first set of duplicates, listed there too). # Delete duplicate rows based on specific columns df2 = df.drop_duplicates(subset=["Courses", "Fee"], keep=False) print(df2) Yields the same output as above. Can several CRTs be wired in parallel to one oscilloscope circuit? rmRows = rowNums(2, ~isnan(rowNums(2,:))); Thank you. {'A'} 0.12699 0.91574 0.25 Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, Fastest way to duplicate an array in JavaScript - slice vs. 'for' loop, Remove pandas rows with duplicate indices. The arg_max () aggregated function can be used to filter out the duplicate records and return the last record based on the timestamp (or another column). Other MathWorks country I don't see the duplication in the sample dataset? I have a table with a number of columns and would like to delete some rows based on some conditions. Not at all clear what is the result wanted from this dataset, to me, anyways contains the test names which can be strings, character vectors, categoricals, or numeric. A default count of 1 is used if the count parameter isn't provided. I have a table with four columns and roughly 45,000 rows (example below). Once you have clicked on it, a small dialog box will appear. to have the same values in both variables unless the result is an empty array (no matches). Accelerating the pace of engineering and science. your location, we recommend that you select: . Thanks for your help! The duplicate rows remained after running it this time. Table.RemoveRows(table as table, offset as number, optional count as nullable number) as table About. TIA. If you look at the first example you'll see that in the first column of the duplicate rows the names are slight different (where the ms times are). You can specify your own. 92.0000 166.0000 71.0000 173.0000 55.0000 235.0000 72.6667 191.3333]; I want to remove the redundant rows from A. there are 2 rows for same data. I assume this is the right structure. Delete Rows by Row Number Delete rows 18, 20, and 21 from the table. },5,1),rand(15,1), rand(15,1), repmat([0;.25;.25;.5;.5],3,1), % For each testtype, identify the first row where col4 is .25 and .50. Find centralized, trusted content and collaborate around the technologies you use most. 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