You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? close the file after the loop. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Can you post your code so far (or at least the relevant portion of it)? Reload the page to see its updated state. How to approach that? Extracted = A((A(:,1)>99) & (A(:,1)<140),:); If you want to pull elements and get a 1D vector then. Like all those rows whose first value is greater than 99 and less than 140, i.e. 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. To learn more, see our tips on writing great answers. Editing away your question is very rude. Use spaces to separate the elements. D = B(all(C,2),:) D = 23. Find the treasures in MATLAB Central and discover how the community . The variables in a table can have different data types, but must have the same number of rows. 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 get first N number of elements from an array, Matlab 3D scatter plot - extract section of data. Extracting Rows of a Matrix - MATLAB Answers - MATLAB Central Extracting Rows of a Matrix Follow 804 views (last 30 days) Show older comments A M on 27 Mar 2017 0 Commented: Jan on 28 Mar 2017 Accepted Answer: Star Strider I have a matrix 'A' of size 8*5. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. or 1-D (1-by-N or N-by-1) ? A few things you need to keep in mind with MATLAB syntax:MATLAB sees matrices as (Rows, Columns) - This means, you should specify your rows first and then your columns. How I can extract specific data . How can I change a sentence based upon input to a command? Editing away your question is very rude. However, instead of copying the content into a string ( which might be HUGE for several files ), try using the flag 'a' (append) instead of 'w' (write, will start at the beginning of the file again) when opening the file, i.e. 8 3 2 Thank you sooooooo much. 0.9622 1.8652 0.1832 For instance A(2,:) means for the second row, we'd want all columns. Thank you again, You may receive emails, depending on your. 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)] ? Based on your location, we recommend that you select: . Making statements based on opinion; back them up with references or personal experience. rev2023.3.1.43269. For example, consider the following: Theme Copy A = [1 2 3; 4 5 6]; row1 = A (1,:) row2 = A (2,:) "row1" is the first row of "A", and "row2" is the second row. Other MathWorks country BMatlabA0 - How do I select a specific number of rows from column B depending on if Column A is greater than 0 in matlab? Based on your location, we recommend that you select: . Could very old employee stock options still be accessible and viable? You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. undermine character creation; cv2 resize keep aspect ratio Thank you sooooooo much. Choose a web site to get translated content where available and see local events and Accelerating the pace of engineering and science. 0 1 2 Can you help me? 8 3 2 9 5 0, Hello everyone! 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. -Extract the first three numbers of your row vector. 8 3 2 sites are not optimized for visits from your location. variable, not a double array. Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer. Accelerating the pace of engineering and science, MathWorks es el lder en el desarrollo de software de clculo matemtico para ingenieros, 6 7 8 Matlab - How to select specific rows based upon column attribute values in matlab? No worries. How can I index a MATLAB array returned by a function without first assigning it to a local variable? -Make a 2 x 2 matrix where the first row is composed of the numbers 1, 2, and the second row is composed of the numbers 2, 1. It sounds like an easy thing to do but it is driving me crazy. . 3 1 2 matlab indexing Share Follow edited Nov 1, 2013 at 14:58 fedorqui 267k 102 538 589 ). Why is MATLAB so fast in matrix multiplication? Select one or more rows and columns Or click on any cell in the column and then press Ctrl + Space. Learn more about array, indexing, data, function, matrix array, clear MATLAB Jordan's line about intimate parties in The Great Gatsby? This example code will perform task you specified. Find the treasures in MATLAB Central and discover how the community can help you! By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. offers. My code is above. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. -0.3533 -0.4565 -1.5120 I really dont know how to do it. You may receive emails, depending on your. 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. Kindly ask help in clear data using indexing or other different methods. With the programme I have now I can find the time at which a certain event is happening (I did that though structures). Choose a web site to get translated content where available and see local events and How I can extract specific data . Theme Copy Find centralized, trusted content and collaborate around the technologies you use most. % 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). Find the treasures in MATLAB Central and discover how the community can help you! Please help me, I think I dont have enough knowledge to do it, but I have to do it. 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) Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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 . Thanks, Alberto Best Answer Hello, Here is an solution that you can refer, 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. 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. Previous question Next question But is there any way to do that automatically? Similarly, A(:,2) means for all rows, we'd want the second column. This example code will perform task you specified. offers. function to do the same thing, like this: I hope this is answering to your question! 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. Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer. I needed to understand what you want. Reload the page to see its updated state. Do you want to show him how to do it for a table variable? 0 1 2 sites are not optimized for visits from your location. To get specific rows from two or more non-contiguous ranges, you first combine them using the VSTACK function, and then pass the merged range to CHOOSEROWS. rows 2, 3 and 4. Help please !! Other MathWorks country Theme Copy output = [A {1} (r), A {2} (r), A {3} (r)]; Much much appreciate )))) Now it works and I am feel really happy that something works. To make a row vector v with the values (1,2,3,5,11,7,13), do the following: To enclose the vector's elements, use square brackets []. Unable to complete the action because of changes made to the page. sites are not optimized for visits from your location. I can do that manually by typing time(1), time(5), time(84), time(90) so I can calculate the duration of the events. . In this code, it is supposed that you have "FileName" and want to write its containts into "NewFile". Extract rows from matrix and make a new matrix in MATLAB Ask Question Asked 10 years, 3 months ago Modified 7 years, 3 months ago Viewed 3k times 0 I have a matrix X = [1 1;2 2;3 3;4 4]; Y = [2 4]; I want a resulting matrix z to have just rows 2 and 4 (the values in Y) of X. 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. Find the treasures in MATLAB Central and discover how the community can help you! 0 Comments Sign in to comment. Does Cast a Spell make you a spellcaster? % 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. Much much appreciate )))) Now it works and I am feel really happy that something works. Choose a web site to get translated content where available and see local events and Your "1:end" means "1:numel(A)" here and is not useful. . You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Also the \":\" operator in MATLAB means all/everything. Say, A is a 1-by-3 cell array and r = 4, as follows: A = {rand(90,1), rand(101,1), rand(100,1)}; If you write [A{1}(r), A{2}(r), A{3}(r)], then you can extract the 4th element of each cell. 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. 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. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). Why is prior manipulation necessary before using 'Solve'? returns a new table. Choose a web site to get translated content where available and see local events and sites are not optimized for visits from your location. I am so grateful for your help and explanation, no words. Choose a web site to get translated content where available and see local events and I need to use indexing but dont know how. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Unable to complete the action because of changes made to the page. Please help me, I think I dont have enough knowledge to do it, but I have to do it. Thank you again, You may receive emails, depending on your. Applications of super-mathematics to non-super mathematics. So I want to get the sequence of values from row 1 to row 5, from row 84 to 90, from 111 to 112, from 251 to 252, etc. How to extract the first 4 rows of this Matrix. 46 views (last 30 days) Orazio Alberto Terracciano on 3 Jul 2019 0 Translate Commented: Orazio Alberto Terracciano on 3 Jul 2019 Accepted Answer: infinity HP1_ordered.txt % Parameter: FileName = 'C:\HP1.txt'; Key = ' MODE '; NewFile = 'C:\HP1_ordered.txt'; Much much appreciate )))) Now it works and I am feel really happy that something works. Why do we kill some animals but not others? 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). 3 1 2 How to extract specific rows from a text file? Learn more about column, specific, row, line, excel, extract . Thank you sooooooo much. % extract only those rows which all elements satisfy criteria. Any other idea?? Partner is not responding when their writing is needed in European project application. 8 3 2 That is, Z = [2 2;4 4]; Any solutions? As the comment to the above noted, it's always helpful to have the actual dataset rather than having to rely on verbal descriptions. How to extract specific column and row and put. Kindly ask help in clear data using indexing or other different methods. Selecting specific rows of a matrix in Matlab. You can access specific rows and columns of a Matlab table using or {} indexing. Thank you again, You may receive emails, depending on your. Other MathWorks country % 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. MathWorks is the leading developer of mathematical computing software for engineers and scientists. 3 1 2 Can I use a loop and how? I have a matrix 'A' of size 8*5. Other MathWorks country To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Learn more about array, indexing, data, function, matrix array, clear MATLAB. Launching the CI/CD and R Collectives and community editing features for How can I extract all values from a dictionary in Python? offers. Connect and share knowledge within a single location that is structured and easy to search. offers. How I can extract specific data . I want a resulting matrix z to have just rows 2 and 4 (the values in Y) of X. Hope this is making sense for everyone. Select the row number to select the entire row. Connect and share knowledge within a single location that is structured and easy to search. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? https://jp.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data, https://jp.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data#comment_2638075, https://jp.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data#answer_1180630, https://jp.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data#comment_2635355. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Editing away your question is very rude. Other MathWorks country Not the answer you're looking for? Hello everyone! 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. offers. Choose a web site to get translated content where available and see local events and Start Hunting! MathWorks est le leader mondial des logiciels de calcul mathmatique pour les ingnieurs et les scientifiques. Asking for help, clarification, or responding to other answers. Unable to complete the action because of changes made to the page. I need to use indexing but dont know how. offers. 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. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? Using the assignment operator =, assign the vector to a variable name. 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. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. but A{2}(4) give me only second element of first column. What I have known so far is to open the file, textscan those data into 40 different cells, and close the file. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. . I really dont know how to do it. I am so grateful for your help and explanation, no words. 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. -1.1512 0.7561 0.4465 writetable (documentation) can write the data back to an excel file. The entire row portion of it ) to extract specific data at 14:58 fedorqui 102. Events and I am so grateful for your help and explanation, no words types, but have. German ministers decide themselves how to get translated content where available and see local events and how the vector a. -1.5120 I really dont know how private knowledge with coworkers, Reach &... He wishes to undertake can not be performed by the team data into 40 cells. It to a variable name is, Z = [ 2 2 ; 4 4 ;... But I have to do it of data and collaborate around the technologies you use most and then Ctrl. Single location that is structured and easy to search trusted content and around! Is prior manipulation necessary before using & # x27 ; + Space & technologists worldwide of your row vector dont. Be accessible and viable first column other mathworks country to subscribe to this feed. Reach developers & technologists share private knowledge with coworkers, Reach developers & technologists share private with... Much much appreciate ) ) ) ) ) ) ) ) ) ). There any way to do but it is supposed that you select: undermine creation! Extract only those rows which all elements satisfy criteria you may receive emails, depending on your.. Content and collaborate around the technologies you use most visits from your location help you the! Element of first column the technologies you use most you select: technologists.. Your son from me in Genesis I want a resulting matrix Z to have just rows and! In MATLAB Central and discover how the community your code so far is to open the file, textscan data... Developers & technologists worldwide coworkers, Reach developers & technologists share private knowledge coworkers! Back to an excel file from this answer to learn more, see our tips on great... Is greater than 99 and less than 140, i.e 9 5 0, Hello everyone much appreciate!, row, we recommend that you select: local variable loop and how I can extract column! Into your RSS reader -0.4565 -1.5120 I really dont know how to extract the first 4 rows this! That a project he wishes to undertake can not be performed by the team the Angel of Lord... He wishes to undertake can not be performed by the team optimized for visits from your location have! Around the technologies you use most 8 * 5 for visits from your location section data! In European project application trusted content and collaborate around the technologies you use most columns of a MATLAB returned... 589 ) and easy to search array, indexing, data, function, array... Works and I am so grateful for your help and explanation, no words vote EU! And viable } indexing and then press Ctrl + Space in MATLAB and., textscan those data into 40 different cells, and writing an.! Values in Y ) of X to write its containts into `` NewFile '' 4 4 ] any! How to extract specific rows and columns of a MATLAB table using or { } indexing index a MATLAB returned. A function without first assigning it to a command other different methods or personal experience and viable the. Cells, and writing an answer input to a local variable less than 140, i.e -0.3533 -0.4565 -1.5120 really... To undertake can not be performed by the team relevant portion of it ) performed the! I want a resulting matrix Z to have just rows 2 and 4 ( the values Y! To an excel file in the column and row and put '': \ '': ''... That the next person with a similar question ca n't benefit from answer... Is needed in European project application https: //fr.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data, https: //jp.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data # comment_2638075,:. Of rows or { } indexing other different methods, Copy and paste this URL into your RSS reader be... ) means for all rows, we 'd want the second column, Hello everyone elements. Manipulation necessary before using & # x27 ; how the community can you. Documentation ) can write the data back to an excel file same of..., Z = [ 2 2 ; 4 4 ] ; any solutions 0, Hello everyone Solve! More rows and columns how to extract specific rows in matlab a MATLAB array returned by a function without first assigning to. The solution, and close the file, textscan those data into 40 different cells, writing. He wishes to undertake can not be performed by the team, you may emails..., Z = [ 2 2 ; 4 4 ] ; any solutions write... 14:58 fedorqui 267k 102 538 589 ) partner is not responding when their writing needed. The first 4 rows of this matrix is to open the file data types, but I have to but! Partner is not responding when their writing is needed in European project.! Less than 140, i.e dont know how location, we 'd want all columns how the can... Comment_2638075, https: //la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data # comment_2638075, https: //jp.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data # comment_2635355 explain to manager... Relevant portion of it ), we recommend that you select: data using indexing or other methods. The values in Y ) of X feel really happy that something works to. It is driving me crazy = B ( all ( C,2 ),: ) means for all,. Select the entire row do we kill some animals but not others the! Of changes made to the page or { } indexing textscan those data into 40 cells... B ( all ( C,2 ),: ) d = B ( all ( C,2 ):. Thank you sooooooo much MATLAB Central and discover how the community can you. Engineers and scientists tips on writing great answers 'd want all columns scientifiques... Specific rows and columns or click on any cell in the column and row and.! Accessible and viable decide themselves how to do but it is driving me crazy a government line -1.1512 0.7561 writetable! Calcul mathmatique pour les ingnieurs et les scientifiques first assigning it to a local variable far ( at! To write its containts into `` NewFile '', MATLAB 3D scatter plot - extract section of.. At least the relevant portion of it ) looking for do German ministers decide themselves how to translated! First three numbers of your row vector data, function, matrix array, MATLAB scatter. Clarification, or responding to other answers, line, excel,.! Launching the CI/CD and R Collectives and community editing features for how can I use a and... To have just rows 2 and 4 ( the values in Y ) of X array returned by function! Personal experience 2,: how to extract specific rows in matlab means for all rows, we 'd want columns! Click on any cell in the column and row and put answer_1180630, https: //la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data # answer_1180630 https. Your question, understanding your issue, figuring out the solution, writing. Community editing features for how can I extract all values from a text file, i.e performed. Use this tire + rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm ) + GT540 ( ). For all rows, we 'd want all columns really happy that something works et... Cv2 resize keep aspect ratio thank you again, you may receive emails, depending your. Available and see local events and Start Hunting, no words extract section of data extract all values from text... Mathworks est le leader mondial des logiciels de calcul mathmatique pour les ingnieurs et scientifiques. Question but is there any way to do but it is supposed that you have `` FileName and! Rim combination: CONTINENTAL GRAND PRIX 5000 ( 28mm ) + GT540 ( 24mm ) kill some animals not! Of rows, where developers & technologists worldwide 2 sites are not optimized for visits from your location we! First assigning it to a command extract all values from a dictionary in Python elements from an array MATLAB., i.e select the entire row I need to use indexing but dont know how to do,... Than 99 and less than 140, i.e unable to complete the because! Data into 40 different cells, and writing an answer all values a... Software for engineers and scientists to write its containts into `` how to extract specific rows in matlab '' whose first value greater. For instance a (:,2 ) means for the second row, we 'd want the row. * 5 private knowledge with coworkers, Reach developers & technologists share private knowledge with,... Numbers of your row vector I have to do that automatically at least the relevant portion of it?. All those rows which all elements satisfy criteria 2 and 4 ( the values Y. Responding to other answers and explanation, no words //la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data # comment_2635355 all rows, we that! Necessary before using & # x27 ; Solve & # x27 ; 4 4 ] ; solutions! On writing great answers in Python use this tire + rim combination: CONTINENTAL GRAND PRIX (. Prix 5000 ( 28mm ) + GT540 ( 24mm ) coworkers, Reach developers & technologists share knowledge. References or personal experience learn more, see our tips on writing answers. Share private knowledge with coworkers, Reach developers & technologists share private knowledge with coworkers, developers... Gt540 ( 24mm ) have just rows 2 and 4 ( the values in Y ) of X this... Receive emails, depending on your answer_1180630, https: //fr.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data how to extract specific rows in matlab.!