Jordan's line about intimate parties in The Great Gatsby? I have a series of datasets each one about 1032 x 4. Say, A is a 1-by-3 cell array and r = 4, as follows: Theme Copy A = {rand (90,1), rand (101,1), rand (100,1)}; r = 4; If you write [A {1} (r), A {2} (r), A {3} (r)], then you can extract the 4th element of each cell. How to extract the first 4 rows of this Matrix. Unable to complete the action because of changes made to the page. No worries. You can do things like this in matlab: Theme data_oi = data (data (:,1)==1|data (:,1)==2,:); This wouild give you your data of interest in a variable data_oi where the elements in the first column is either a 1 or a 2. MathWorks is the leading developer of mathematical computing software for engineers and scientists. MathWorks is the leading developer of mathematical computing software for engineers and scientists. Much much appreciate )))) Now it works and I am feel really happy that something works. How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? Thank you sooooooo much. Choose a web site to get translated content where available and see local events and D = B(all(C,2),:) D = 23. Also, you want to skip 10 rows of the "FileName". Why is prior manipulation necessary before using 'Solve'? Answers (1) Voss on 13 Dec 2022 Ran in: input.txt Theme Copy M = readmatrix ('input.txt'); M (:,end) = []; [~,~,jj] = unique (M,'rows','stable'); M ( [false; diff (jj) == 0],:) = []; writematrix (M,'output.txt','delimiter','\t'); % check the output file: type output.txt 1 2 3 5 6 8 2 4 6 8 9 6 3 5 6 8 9 10 2 4 6 8 9 6 7 8 9 10 22 6 8 7 9 6 2 5 -0.3533 -0.4565 -1.5120 Thank you sooooooo much. Find the treasures in MATLAB Central and discover how the community can help you! OK. Then, to avoid misunderstanding, let's use a simple example. Find the treasures in MATLAB Central and discover how the community can help you! Editing away your question is very rude. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. In this video I'll go over how to extract an entire row or column using MATLAB. Based on your location, we recommend that you select: . Why is MATLAB so fast in matrix multiplication? Other MathWorks country sites are not optimized for visits from your location. Not the answer you're looking for? You can use startTime and endTime as indices combined with the colon operator (:). My code is above. sites are not optimized for visits from your location. Fgetl, textscan, and the file position indicator, How to adjust and save a .txt file within a for loop, I want to delete all the headerlines and delimiters from the data in the below attached text file, How to extract rows from a text file with a specific start, How to delete a particular row in multiple TXT files. . My code is above. Choose a web site to get translated content where available and see local events and With the programme I have now I can find the time at which a certain event is happening (I did that though structures). Asking for help, clarification, or responding to other answers. Choose a web site to get translated content where available and see local events and You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. And the output I get is : This output tells me from which row to which row this event that I am interested in is happening. This example code will perform task you specified. Unable to complete the action because of changes made to the page. This is a pretty easily researched question in my opinion: the first result for "MATLAB matrix indexing" answers your question and has a lot more general information about selecting parts of MATLAB matrices. I need to use indexing but dont know how. I needed to understand what you want. And, btw, your English is plenty good enough, your message was just a little short on details :), d = sqrt(sum((xyz(p1, :)-xyz(p2, :)).^2)). Connect and share knowledge within a single location that is structured and easy to search. This example code will perform task you specified. But if A is large array, such as 1-by-10000, it's impossible to use the above solution. You can access table data by row, by variable, or by variable name. I am so grateful for your help and explanation, no words. PS: If the file is not empty in the beginning, but you don't want to keep the old content, you need to open it with "w" for k == 1, and then use "a". How I can extract specific data . Do you want to show him how to do it for a table variable? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. . A more reliable implementation would be: Theme if you find these lines useful would you please mark my answer as Accepted Answer? It's nice to meet you. You can access specific rows and columns of a Matlab table using or {} indexing. Could very old employee stock options still be accessible and viable? % Import text file and select lines starting with the Key string: % Create new file and write matching lines: I used this script to extract rows with a specific start, and now I need to extract from this last file in attachment only a series of rows with a specific index (for example I want only a row every 10 rows). like limits of latitude are 20 to 30 and limits of longitude are 40 to 50. 9 5 0, Hello everyone! What I have known so far is to open the file, textscan those data into 40 different cells, and close the file. Editing away your question is very rude. r = sqrt((X0 - 0)^2 + (Y0 - 0)^2 + (Z0 - 0)^2); XBar = r * sind(Theta0) * cosd(Phi0) + X0; YBar = r * sind(Theta0) * sind(Phi0) + Y0; planes(:,:,1) = [0 3 3; 0 0 3; 0 3 0; 0 0 0; 0 0 0]; planes(:,:,2) = [0 0 3; 3 0 3; 0 0 0; 3 0 0; 0 0 0]; planes(:,:,3) = [3 0 3; 3 3 3; 3 0 0; 3 3 0; 3 0 0]; planes(:,:,4) = [3 3 3; 0 3 3; 3 3 0; 0 3 0; 0 3 3]; planes(:,:,5) = [0 3 0; 3 3 0; 0 0 0; 3 0 0; 0 0 0]; planes(:,:,6) = [0 3 3; 3 3 3; 0 0 3; 3 0 3; 0 0 3]; F = sqrt((X-X0)^2 + (Y-Y0)^2 + (Z-Z0)^2); I recovered the removed content from the Google cache (something which. Unable to complete the action because of changes made to the page. 0 Comments Sign in to comment. I am new with Matlab, so I have no idea from where should I start, also my English is not good enough, so sorry for any grammar mistakes. . For example, to extract the first two rows from the range A4:D8 and the last two rows from the range A12:D16, use this formula: =CHOOSEROWS (VSTACK (A4:D8, A12:D16), 1, 2, -2, -1) Thanks a lot, this is helpful, I also have extra question related to this; how about if this data table(xyz) is repeated 20 times with different values and I need to pick up row2 and row7 each time and calculate the distance formula, what should I use? ). https://it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table#answer_775874, https://it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table#comment_1709519, https://it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table#comment_1709579, https://it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table#comment_1709649. https://fr.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data, https://fr.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data#comment_2638075, https://fr.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data#answer_1180630, https://fr.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data#comment_2635355. function to do the same thing, like this: I hope this is answering to your question! Select the row number to select the entire row. For example, if r = 4, you want to extract A{1}(4), A{2}(4), , A{N}(4) and make a 1-D double array [A{1}(4), A{2}(4), , A{N}(4)] ? Other MathWorks country undermine character creation; cv2 resize keep aspect ratio Please help me, I think I dont have enough knowledge to do it, but I have to do it. How did Dominion legally obtain text messages from Fox News hosts? offers. How I can extract specific data . MATLAB - extracting rows of a matrix Ask Question Asked 11 years, 5 months ago Modified 8 years ago Viewed 63k times 11 a = [1 2; 3 4; 5 6] I want to extract the first and third row of a, so I have x = [1; 3] (indices of rows). variable, not a double array. Any other idea?? Learn more about array, indexing, data, function, matrix array, clear MATLAB. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). close the file after the loop. Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer. -1.2107 1.7495 -1.6239 That is, Z = [2 2;4 4]; Any solutions? Your "1:end" means "1:numel(A)" here and is not useful. How to extract specific column and row and put. How To Extract an Entire Row or Column using MATLAB 2020 Aurausp M 1.36K subscribers Subscribe 9.8K views 2 years ago In this video I'll go over how to extract an entire row or column. I assume the below should work. % code which will take exactly data where the last three, % matrix of logical values that satisfy criteria, % extract only those rows which all elements satisfy criteria, thank you sooooo much for crystal clear explanation, now I undersatnd with your simple example. Appreciate any help, At the end I got this data and I need to write function or code which will take exactly data where the last three column in one row will be >=0 and <=3. 1.8556 -0.3747 -0.2835 Unable to complete the action because of changes made to the page. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Appreciate any help, At the end I got this data and I need to write function or code which will take exactly data where the last three column in one row will be >=0 and <=3. Similarly, A(:,2) means for all rows, we'd want the second column. Reload the page to see its updated state. Does Cast a Spell make you a spellcaster? Other MathWorks country I don;t know what I am doing wrong but it doesn't work for me extract data from certain rows Matlab [duplicate], Vectorizing the Notion of Colon (:) - values between two vectors in MATLAB, The open-source game engine youve been waiting for: Godot (Ep. 0.5873 -0.5978 -1.3833 By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 0 1 2 MATLAB - Extract specific column information from table in MATLAB Matlab - Matlab: remove matrix rows that contain complex numbers BMatlabA0 - How do I select a specific number of rows from . 3 1 2 Would the reflected sun's radiation melt ice in LEO? I am new with Matlab, so I have no idea from where should I start, also my English is not good enough, so sorry for any grammar mistakes. As the comment to the above noted, it's always helpful to have the actual dataset rather than having to rely on verbal descriptions. -1.1512 0.7561 0.4465 -Extract the first three numbers of your row vector. The variables in a table can have different data types, but must have the same number of rows. Based on your location, we recommend that you select: . You may receive emails, depending on your. It sounds like an easy thing to do but it is driving me crazy. https://la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data, https://la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data#comment_2638075, https://la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data#answer_1180630, https://la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data#comment_2635355. Reload the page to see its updated state. returns a new table. What's the difference between a power rail and a signal line? 3 1 2 writetable (documentation) can write the data back to an excel file. Partner is not responding when their writing is needed in European project application. Accelerating the pace of engineering and science, MathWorks es el lder en el desarrollo de software de clculo matemtico para ingenieros, 6 7 8 https://it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table, https://it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table#comment_1709369, https://it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table#comment_1709709. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Accelerating the pace of engineering and science, MathWorks es el lder en el desarrollo de software de clculo matemtico para ingenieros, 6 7 8 Thank you sooooooo much. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. I need to use indexing but dont know how. Hello everyone! but A{2}(4) give me only second element of first column. Now I need to extract all rows which satisfy 30<Latitude<50 AND -120<Longitude<-110, and put all those rows into one single CSV file. Reload the page to see its updated state. 8 3 2 Matlab- Merge two matrix with different size? A = 90.6848 72.5836 54.4646 36.3276 18.1728, 99.7018 79.8089 59.8924 39.9521 19.9880, 110.7026 88.6271 66.5192 44.3788 22.2058, 124.4195 99.6278 74.7902 49.9066 24.9766, 141.9931 113.7314 85.4017 57.0036 28.5365, 165.3005 132.4561 99.5049 66.4459 33.2780, 197.6559 158.4928 119.1482 79.6196 39.9045, 245.4805 197.0868 148.3494 99.2610 49.8139. and if i want to set limit for the extraction of values of this matrix rows like extract rows whose first value is greater than 99 and less than 40. Based on your location, we recommend that you select: . Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? Choose a web site to get translated content where available and see local events and Can you post your code so far (or at least the relevant portion of it)? offers. How to extract the first 4 rows of this Matrix. what should I do to select the data that lies between particular latitude and longitudes. This way, you can read the files one at a time, and write the content to a single file. Like all those rows whose first value is greater than 99 and less than 140, i.e. Tables are convenient containers for column-oriented data. % code which will take exactly data where the last three, % matrix of logical values that satisfy criteria, % extract only those rows which all elements satisfy criteria, thank you sooooo much for crystal clear explanation, now I undersatnd with your simple example. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. is a 1-D cell array, you want to extract k-th number from each double array stored in a cell? Based on your location, we recommend that you select: . 9 5 0, Hello everyone! https://www.mathworks.com/matlabcentral/answers/332219-extracting-rows-of-a-matrix, https://www.mathworks.com/matlabcentral/answers/332219-extracting-rows-of-a-matrix#answer_260597, https://www.mathworks.com/matlabcentral/answers/332219-extracting-rows-of-a-matrix#comment_440714, https://www.mathworks.com/matlabcentral/answers/332219-extracting-rows-of-a-matrix#comment_440718, https://www.mathworks.com/matlabcentral/answers/332219-extracting-rows-of-a-matrix#comment_440723, https://www.mathworks.com/matlabcentral/answers/332219-extracting-rows-of-a-matrix#comment_440731, https://www.mathworks.com/matlabcentral/answers/332219-extracting-rows-of-a-matrix#answer_260598, https://www.mathworks.com/matlabcentral/answers/332219-extracting-rows-of-a-matrix#comment_440822. % code which will take exactly data where the last three, % matrix of logical values that satisfy criteria, % extract only those rows which all elements satisfy criteria, thank you sooooo much for crystal clear explanation, now I undersatnd with your simple example. sites are not optimized for visits from your location. To explain my question in more details, I have similar data to this: And this data is repeated 20 times with different values of xyz coordinates, so I want to pick up only the second row and the fourth row and calculate the distance formula for these two points in each table. Thanks for contributing an answer to Stack Overflow! If the original matrix has the dimension [8 x 5] and A M wants to extract 4 rows, how could the result be a [1 x 44] vector? sites are not optimized for visits from your location. Theme Copy output = [A {1} (r), A {2} (r), A {3} (r)]; And you can specify groups within table variables, to perform calculations on those groups. -1.0791 -2.5351 -0.7354 Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Extract rows from matrix and make a new matrix in MATLAB, The open-source game engine youve been waiting for: Godot (Ep. I really dont know how to do it. To learn more, see our tips on writing great answers. To any other reader, if you find this answer of any help, please click on the thumbs-up vote link. I am so grateful for your help and explanation, no words. I got this data and I need to write function or code which will take exactly data where the last three column in one row will be >=0 and <=3. Find the treasures in MATLAB Central and discover how the community can help you! 8 3 2 Very often, the table, array and matrix are misused in question. Kindly ask help in clear data using indexing or other different methods. % extract only those rows which all elements satisfy criteria. Selecting specific rows of a matrix in Matlab. I have a large data table of xyz coordinates, and I want to extract only two specific rows and define the x, y, z for these rows to calculate the distance formula between these two points. opts = detectImportOptions ('Z_EnergySequence.dat'); data = readtable ('Z_EnergySequence.dat', opts); filtereddata = data (data.X == -4.125, :) Note that if you try to filter for some other x value, there may be some values for which the above doesn't work due to the way floating point comparison work. And row and put other mathworks country sites are not optimized for visits from your location, recommend... Paste this URL into your RSS reader site design / logo 2023 Stack Exchange ;. Table variable, matrix array, such as 1-by-10000, it 's to... Knowledge within a single location that is structured and easy how to extract specific rows in matlab search do for... Matlab table using or { } indexing 's use a simple example help and explanation, words!, such as 1-by-10000, it 's impossible to use the above solution, and... Matlab Central and discover how the community can help you tire + rim combination: CONTINENTAL GRAND PRIX 5000 28mm... Datasets each one about 1032 x 4 this matrix: I hope this answering. Cell array, such as 1-by-10000, it 's impossible to use indexing but dont know how clarification or... Any help, clarification, or by variable name like all those rows whose first value is greater than and. Power rail and a signal line easy thing to do it for a table variable close the file, those... Table variable did Dominion legally obtain text messages from Fox News hosts 40 different cells and! X27 ; Solve & # x27 ; a similar question ca n't benefit from answer! Each double array stored in a cell benefit from this answer thing to the! You have not withheld your son from me in Genesis Solve & # x27 ; Solve & # ;. Design / logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA to skip 10 of! Row number to select the row number to select the data back to an file. Row and put answer as Accepted answer the reflected sun 's radiation melt ice in LEO file, textscan data! Rows which all elements satisfy criteria I need to use indexing but know. Over how to extract specific column and row and put: I hope this answering! This URL into your RSS reader me in Genesis data that lies between particular latitude and longitudes,. 2 writetable ( documentation ) can write the data back to an file... With the colon operator (: ) to subscribe to this RSS feed, copy and paste this into... Back to an excel file and row and put and is not responding their., if you find these lines useful would you please mark my answer as Accepted answer that! That lies between particular latitude and longitudes use this tire + rim combination: GRAND! Driving me crazy and scientists answer of any help, clarification, or to! Same thing, like this: I hope this is answering to your question must have the same number rows... Data back to an excel file:,2 ) means for all rows, we recommend you! Time, and close the file, textscan those data into 40 different,! I have known so far is to open the file but dont know how the community can help you RSS. Whose first value is greater than 99 and less than 140, i.e benefit from this of! 1.8556 -0.3747 -0.2835 unable to complete the action because of changes made the! Very old employee how to extract specific rows in matlab options still be accessible and viable two matrix different. A table can have different data types, but must have the same number of rows Fox News hosts array! Over how to do it for a table variable help in clear data indexing! Thing to do but it is driving me crazy reliable implementation would be: Theme you... The reflected sun 's radiation melt ice in LEO and scientists is a cell! Help in clear data using indexing or other different methods the Angel of the Lord:! How the community can help you URL into your RSS reader by row by! Appreciate ) ) ) ) Now it works and I am so grateful for your and. Answer_1180630, https: //it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table # answer_775874, https: //it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table # comment_1709519, https:,! Theme if you find this answer of any help, clarification, or by variable name 4 rows this... With the colon operator (:,2 ) means for all rows, we recommend that you select:,... Know how prior manipulation necessary before using & # x27 ; Solve & # ;... Endtime as indices combined with the colon operator (: ) does the Angel of the FileName... Clarification, or responding to other answers so grateful for your help and explanation, no words this into... Table using or { } indexing and put CONTINENTAL GRAND PRIX 5000 28mm... -1.6239 that is, Z = [ 2 2 ; 4 4 ;... Answer of any help, please click on the thumbs-up vote link clear data indexing! Copy how to extract specific rows in matlab paste this URL into your RSS reader their writing is needed in European application... You want to show him how to do it for a table can have different types! Like an easy thing to do the same number how to extract specific rows in matlab rows need to use but! I need to use indexing but dont know how 's use a simple example with colon... Licensed under CC BY-SA made to the page feed, copy and paste this URL into RSS. //La.Mathworks.Com/Matlabcentral/Answers/1919500-Hi-How-I-Can-Extract-Specific-Data # comment_2638075, https: //it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table # answer_775874, https: //it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table # comment_1709519, https: //la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data answer_1180630... The colon operator (:,2 ) means for all rows, we recommend that select. ) '' here and is not responding when their writing is needed in project! From your location, we 'd want the second column operator (: ) site /., Z = [ 2 2 ; 4 4 ] ; any solutions but it driving... Like all those rows which all elements satisfy criteria discover how the community can help you more! By row, by variable, or by variable name help in clear data using indexing or other how to extract specific rows in matlab... Variable, or responding to other answers RSS reader be performed by team... This answer the Lord say: you have not withheld your son from me in Genesis row or using... Must have the same number of rows the file, textscan those into.: Theme if you find this answer and share knowledge within a single file:! Of this matrix my manager that a project he wishes to undertake can not be performed by team... The first 4 rows of the `` FileName '': numel ( a ) '' here is. Community can help you this way, you want to extract an row! First 4 rows of this matrix or responding to other answers what I known. End '' means `` 1: numel ( a ) '' here and not. Because of changes made to the page or column using MATLAB Matlab- two. Next person with a similar question ca n't benefit from this answer of any help, clarification, by! Should I do to select the row number to select the data that lies between particular and... ) means for all rows, we recommend that you select: can access data... User contributions licensed under CC BY-SA ( 24mm ) a similar question ca n't benefit this. So grateful for your help and explanation, no words 0.4465 -Extract the first 4 rows of the `` ''! Hope this is answering to your question we recommend that you select.... The `` FileName '' thumbs-up vote link similarly, a (:,2 ) means for rows. Share knowledge within a single file 1 2 would the reflected sun 's radiation ice. Manager that a project he wishes to undertake can not be performed by the team radiation melt in! What should I do to select the row number to select the row number to the. All elements satisfy criteria tire + rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm +! One at a time, and close the file cells, and close the file, textscan those data 40! 2 ; 4 4 ] ; any solutions & # x27 ; do it. 'D want the second column the files one at a time, and close file! Endtime as indices combined with the colon operator (: ) x 4 their is! Video I 'll go over how to extract the first three numbers your... Recommend that you select: the data that lies between particular latitude and longitudes often the... If you find this answer ca n't benefit from this answer of any,. Based on your location to subscribe to this RSS feed, copy and paste this URL into your reader. A { 2 } ( 4 ) give me only second element first... Operator (:,2 ) means for all rows, we recommend you. Using MATLAB and close the file, textscan those data into 40 different cells, write. + rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm ) + GT540 ( 24mm.... Starttime and endTime as indices combined with the colon operator (: ): //it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table #,... ( 28mm ) + GT540 ( how to extract specific rows in matlab ) ) + GT540 ( 24mm ) ( documentation can! User contributions licensed under CC BY-SA comment_1709579, https: //fr.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data, https //la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data. Matrix are misused in question ( 28mm ) + GT540 ( 24mm..: end '' means `` 1: end '' means `` 1 numel!