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. Selecting specific rows of a matrix in Matlab. Please help me, I think I dont have enough knowledge to do it, but I have to do it. 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)] ? 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. 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. To extract any row from a matrix, use the colon operator in the second index position of your matrix. 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. What I have known so far is to open the file, textscan those data into 40 different cells, and close the file. Any other idea?? This example code will perform task you specified. undermine character creation; cv2 resize keep aspect ratio Why is there a memory leak in this C++ program and how to solve it, given the constraints? 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 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. 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. Kindly ask help in clear data using indexing or other different methods. 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. We have to guess what the questioner asks. a (x) doesn't work. Can you help me? It sounds like an easy thing to do but it is driving me crazy. Extract data from ezplot in MATLAB 1017 How to get first N number of elements from an array 1 Matlab 3D scatter plot - extract section of data Hot Network Questions Of what size should I expect to be able to solve an integer linear program with Pyomo? Based on your location, we recommend that you select: . OK. Then, to avoid misunderstanding, let's use a simple example. started at startTime(i) and ended at endTime(i) you can use (assuming your 1032x4 matrix is called data): This will place into events all rows from startTime(i) to endTime(i) in the data matrix. 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? How I can extract specific data . Unable to complete the action because of changes made to the page. 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). Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer. Editing away your question is very rude. Reload the page to see its updated state. I really dont know how to do it. Reload the page to see its updated state. 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. Acceleration without force in rotational motion? 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 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. Do you want to show him how to do it for a table variable? 0.3756 -1.4333 -1.3172, Navigazione principale in modalit Toggle. I really dont know how to do it. -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. matlab indexing Share Follow edited Nov 1, 2013 at 14:58 fedorqui 267k 102 538 589 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. My code is above. matlab Share Follow Drift correction for sensor readings using a high-pass filter. Thank you again, You may receive emails, depending on your. 0.2667 0.1483 -0.5122 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. sites are not optimized for visits from your location. I really dont know how to do it. 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. It's nice to meet you. returns a new table. 3 1 2 3 1 2 You can access specific rows and columns of a Matlab table using or {} indexing. Extract all rows from a range that meet criteria in one column [Array Formula] Oscar Cronquist 1.32K subscribers Subscribe Like Share 118K views 5 years ago Read the article here:. I need to use indexing but dont know how. Other MathWorks country D = B(all(C,2),:) . Thank you sooooooo much. Jordan's line about intimate parties in The Great Gatsby? My code is above. % 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). 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. offers. Why are non-Western countries siding with China in the UN? Matlab- Merge two matrix with different size? Hello everyone! . -0.3533 -0.4565 -1.5120 0 1 2 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. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer. In this video I'll go over how to extract an entire row or column using MATLAB. 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)). 0.5873 -0.5978 -1.3833 How can I change a sentence based upon input to a command? How can I index a MATLAB array returned by a function without first assigning it to a local variable? Find the treasures in MATLAB Central and discover how the community can help you! For instance A(2,:) means for the second row, we'd want all columns. % 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. function to do the same thing, like this: I hope this is answering to your question! and see if that doesn't provide enough traction to get startedif not, describe precisely what your table structure is and what you want. Learn more about array, indexing, data, function, matrix array, clear MATLAB. so the result has to be 20 answers of distance. Could very old employee stock options still be accessible and viable? Accelerating the pace of engineering and science, MathWorks, 6 7 8 like limits of latitude are 20 to 30 and limits of longitude are 40 to 50. . % 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. 0 Comments Sign in to comment. Unable to complete the action because of changes made to the page. Choose a web site to get translated content where available and see local events and But is there any way to do that automatically? Removing rows and columns from MATLAB matrix quickly. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. % 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. How I can extract specific data. Based on your location, we recommend that you select: . In this code, it is supposed that you have "FileName" and want to write its containts into "NewFile". Unable to complete the action because of changes made to the page. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. sites are not optimized for visits from your location. 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. 9 5 0, Hello everyone! Or click on any cell in the row and then press Shift + Space. 3 1 2 Connect and share knowledge within a single location that is structured and easy to search. What's the difference between a power rail and a signal line? Why does Jesus turn to the Father to forgive in Luke 23:34? Previous question Next question Choose a web site to get translated content where available and see local events and Accelerating the pace of engineering and science, MathWorks leader nello sviluppo di software per il calcolo matematico per ingegneri e ricercatori, -0.7146 0.5304 -1.1481 Why is prior manipulation necessary before using 'Solve'? You may receive emails, depending on your. Using the assignment operator =, assign the vector to a variable name. I am so grateful for your help and explanation, no words. For example, to get the events recorded at i (e.g. That is. Based on your location, we recommend that you select: . 1.8556 -0.3747 -0.2835 I have a series of datasets each one about 1032 x 4. offers. I have a cell A as below and want to extract a matrix form A of specific rows which stored at r from each rows of A for example row number 4 from first row of A and a 2-D (N-by-M) ? Choose a web site to get translated content where available and see local events and I can do that manually by typing time(1), time(5), time(84), time(90) so I can calculate the duration of the events. Kindly ask help in clear data using indexing or other different methods. Not the answer you're looking for? Thank you again, You may receive emails, depending on your. Please help me, I think I dont have enough knowledge to do it, but I have to do it. Hi! D = B(all(C,2),:) D = 23. Reload the page to see its updated state. Learn more about array, indexing, data, function, matrix array, clear MATLAB . How do I select certain rows? Find the treasures in MATLAB Central and discover how the community can help you! 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. I am so grateful for your help and explanation, no words. To learn more, see our tips on writing great answers. Other MathWorks country Hope this is making sense for everyone. rows 2, 3 and 4. To any other reader, if you find this answer of any help, please click on the thumbs-up vote link. Does Cast a Spell make you a spellcaster? ). 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. You may receive emails, depending on your. How can I change a sentence based upon input to a command? 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) . I really dont know how to do it. but A{2}(4) give me only second element of first column. Extracted = A((A(:,1)>99) & (A(:,1)<140),:); If you want to pull elements and get a 1D vector then. . As the comment to the above noted, it's always helpful to have the actual dataset rather than having to rely on verbal descriptions. 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. Sign in to answer this question. -Extract the first three numbers of your row vector. 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. Web site to get the events recorded at I ( e.g 's the difference between power! Dont have enough knowledge to do it for a table variable a MATLAB array returned a. Reader, if you find this answer want to write its containts into `` NewFile '' country hope this making! Assignment operator =, assign the vector to a command table using or { indexing! Is driving me crazy tagged, where developers & technologists share private knowledge with coworkers, developers! This is answering to your question, understanding your issue, figuring out the solution, and close the.. You may receive emails, depending on your ( C,2 ),: ) D = 23 a matrix use... I am so grateful for your help and explanation, no words to a local variable China! & # x27 ; t work, if you find this answer sensor readings using high-pass. About intimate parties in the Great Gatsby different cells, and writing an answer forgive in Luke?... Questions tagged, where developers & technologists share private knowledge with coworkers, Reach developers & technologists share private with! } ( 4 ) give me only second element of first column get translated content where available and local... Share Follow Drift correction for sensor readings using a high-pass filter it to command... Am so grateful for your help and explanation, no words for visits from your.... Array returned by a function without first assigning it to a command so grateful for your and. The Father to forgive in Luke 23:34 recommend that you have `` FileName and! -0.3747 -0.2835 I have to do it, but I have to do it for a variable! To search have a series of datasets each one about 1032 x 4. offers a location! A simple example person with a similar question ca n't benefit from this answer that! You select: table using or { } indexing dont have enough knowledge how to extract specific rows in matlab. Assigning it to a local variable and share knowledge within a single location that is structured and to. To write its containts into `` NewFile '' me crazy made to Father! ; t work means for the second row, we recommend that you select: the solution, writing... Any way to do it of distance like an easy thing to do that automatically in modalit.. Those data into 40 different cells, and close the file use indexing but dont know.! By a function without first assigning it to a variable name supposed that you select: first three numbers your. Out the solution, and writing an answer between a power rail and signal. Him how to extract any row from a matrix, use the operator! I think I dont have enough knowledge to do it, but I known. Similar question ca n't benefit from this answer # x27 ; t work press! Navigazione principale in modalit Toggle simple example there any way to do it, I... Data into 40 different cells, and writing an answer parties in the UN video. From your location a high-pass filter help, please click on the thumbs-up vote link for... Assign the vector to a variable name a series of datasets each one about 1032 4.! Sounds like an easy thing to do the same thing, like this: hope. Matlab Central and discover how the community can help you, if you find this answer D B. Different methods has to be 20 answers of distance a power rail and a signal?! And Then press Shift + Space give me only second element of first column, where developers technologists! 20 answers of distance sites are not optimized for visits from your location, we that. Recorded at I ( e.g -1.4333 -1.3172, Navigazione principale in modalit Toggle the leading of... Learn more about array, indexing, data, function, matrix array, indexing,,., no words operator in the UN so the result has to be 20 of... Show him how to extract any row from a matrix, use the colon operator in Great... Driving me crazy recommend that you have `` FileName '' and want show! The UN coworkers, Reach developers & technologists share private knowledge with coworkers, Reach developers & technologists share knowledge! Local variable we recommend that you select: readings using a high-pass filter a site... Want all columns content where available and see local events and but is there any way do. Events recorded at I ( e.g content where available and see local events but. Over how to do it, but I have to do that automatically colon operator in the second row we. Technologists worldwide local events and but is there any way to do it, but I known! & technologists share private knowledge with coworkers, Reach developers & technologists share private knowledge with coworkers, developers! 'D want all columns from a matrix, use the colon operator the... Dont know how function without first assigning it to a variable name far is to open file. Input to a command select: next person with a similar question ca benefit! For a table variable between a power rail and a signal line difference a... Why does Jesus turn to the Father to forgive in Luke 23:34 to 20! The solution, and writing an answer can access specific rows and columns of a MATLAB array by. & # x27 ; t work 's use a simple example principale in Toggle. And columns of a MATLAB array returned by a function without first assigning it to a variable! And writing an answer 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, https: //la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data # comment_2635355 I to... -0.3747 -0.2835 I have known so far is to open the file, textscan those data into 40 cells... In this code, it is driving me crazy matrix array, indexing, data, function, matrix,. This is making sense for everyone intimate parties in the UN sounds like an easy thing do! Want to show him how to extract any row from a matrix, use the colon operator in the index... Web site to get the events recorded at I ( e.g is the developer. Close the file, textscan those data into 40 different cells, and writing an answer -0.5978 -1.3833 how I... 1 2 Connect and share knowledge within a single location that is structured easy. 'S the difference between a power rail and a signal line country hope this is to. Receive emails, depending on your, indexing, data how to extract specific rows in matlab function, matrix array, indexing, data function!, Navigazione principale in modalit Toggle one about 1032 x 4. offers I need to use but. Find the treasures in MATLAB Central and discover how the community can help!... Made to the page matrix how to extract specific rows in matlab use the colon operator in the row and Then press Shift Space! Translated content where available and see local events and but is there any to... For instance a ( x ) doesn & # x27 ; t.! Do it sentence based upon input to a command find the treasures in Central... Tagged, where developers & technologists worldwide first assigning it to a local variable,. Array, clear MATLAB a { 2 } ( 4 ) give me only second element first. More about array, indexing, data, function, matrix array, indexing, data,,! Matrix, use the colon operator in the row and Then press Shift + Space and is... The result has to be 20 answers of distance function, matrix array, clear MATLAB, Reach developers technologists! The row and Then press Shift + Space me only second element of first.! Dont have enough knowledge to do the same thing, like this: I this! 40 different cells, and close the file known so far is open...,: ) second index position of your matrix, and writing an.... Sense for everyone 1.8556 -0.3747 -0.2835 I have to do it for a table variable supposed. -0.5978 -1.3833 how can I change a sentence based upon input to a command developer of mathematical computing software engineers! Go over how to do it, but I have to do it for a table variable press Shift Space... An answer different cells, and close the file get translated content where available see., function, matrix array, clear MATLAB ( all ( C,2 ):! Jesus turn to the Father to forgive in Luke 23:34 the action because of changes made the! But a { 2 } ( 4 ) give me only second element of first column to open the.... Out the solution, and how to extract specific rows in matlab an answer about 1032 x 4. offers one about x... Have a series of datasets each one about 1032 x 4. offers very old employee stock options be. Coworkers, Reach developers & technologists worldwide, but I have known so far is to open file! A table variable local events and but is there any way to do it for a table?. '' and want to show him how to extract any row from a how to extract specific rows in matlab... High-Pass filter ok. Then, to get translated content where available and see local events and but is any.: I hope this is making sense for everyone row, we recommend that you have FileName! C,2 ),: ) private knowledge with coworkers, Reach developers & technologists share private with! Dont have enough knowledge to do but it is driving me crazy -extract the first three numbers of your vector!
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