Please help me, I think I dont have enough knowledge to do it, but I have to do it. Based on your location, we recommend that you select: . Find the treasures in MATLAB Central and discover how the community can help you! 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. 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. % 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). Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. Reload the page to see its updated state. 9 5 0, Hello everyone! 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. Find the treasures in MATLAB Central and discover how the community can help you! Based on your location, we recommend that you select: . ). With the programme I have now I can find the time at which a certain event is happening (I did that though structures). 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. offers. Choose a web site to get translated content where available and see local events and D = B(all(C,2),:) . 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. Matlab - How to select specific rows based upon column attribute values in matlab? I assume the below should work. what should I do to select the data that lies between particular latitude and longitudes. 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 Accelerating the pace of engineering and science, MathWorks es el lder en el desarrollo de software de clculo matemtico para ingenieros, 6 7 8 How I can extract specific data . Also the \":\" operator in MATLAB means all/everything. 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 . Use spaces to separate the elements. -1.1512 0.7561 0.4465 Tables are convenient containers for column-oriented data. Based on your location, we recommend that you select: . 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. https://www.mathworks.com/matlabcentral/answers/501927-extract-specific-rows-of-a-cell, https://www.mathworks.com/matlabcentral/answers/501927-extract-specific-rows-of-a-cell#comment_789876, https://www.mathworks.com/matlabcentral/answers/501927-extract-specific-rows-of-a-cell#comment_789878, https://www.mathworks.com/matlabcentral/answers/501927-extract-specific-rows-of-a-cell#answer_411976. Hi! Unable to complete the action because of changes made to the page. rev2023.3.1.43269. if you find these lines useful would you please mark my answer as Accepted Answer? % extract only those rows which all elements satisfy criteria. Unable to complete the action because of changes made to the page. Unable to complete the action because of changes made to the page. 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. How to extract specific rows from a text file? Sign in to answer this question. I needed to understand what you want. . 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. No worries. Thank you sooooooo much. Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer. Do you want to show him how to do it for a table variable? Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? 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. ). 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. Editing away your question is very rude. 0.3756 -1.4333 -1.3172, Navigazione principale in modalit Toggle. How can I change a sentence based upon input to a command? In this code, it is supposed that you have "FileName" and want to write its containts into "NewFile". writetable (documentation) can write the data back to an excel file. How to get first N number of elements from an array, Matlab 3D scatter plot - extract section of data. Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer. 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. Based on your location, we recommend that you select: . Hope this is making sense for everyone. 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. Can you post your code so far (or at least the relevant portion of it)? Like all those rows whose first value is greater than 99 and less than 140, i.e. Hello everyone! Find the treasures in MATLAB Central and discover how the community can help you! Similarly, A(:,2) means for all rows, we'd want the second column. In this video I'll go over how to extract an entire row or column using MATLAB. 8 3 2 matlab Share Follow My code is above. Logical or direct indexing -- without some idea what rule you want to use to define the specific rows of interest, it's hard to know. Thank you sooooooo much. Choose a web site to get translated content where available and see local events and I am so grateful for your help and explanation, no words. 0.2667 0.1483 -0.5122 variable, not a double array. offers. I really dont know how to do it. rows 2, 3 and 4. MathWorks is the leading developer of mathematical computing software for engineers and scientists. How to extract the first 4 rows of this Matrix. Much much appreciate )))) Now it works and I am feel really happy that something works. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Editing away your question is very rude. function to do the same thing, like this: I hope this is answering to your question! I need to use indexing but dont know how. 9 5 0, Hello everyone! 0 1 2 . 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. 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. You may receive emails, depending on your. Matlab- Merge two matrix with different size? Editing away your question is very rude. 0.9622 1.8652 0.1832 Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. -Extract the first three numbers of your row vector. 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. Select the row number to select the entire row. Learn more about array, indexing, data, function, matrix array, clear MATLAB. -1.0791 -2.5351 -0.7354 . How can I index a MATLAB array returned by a function without first assigning it to a local variable? 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). 6 7 8 That is, Z = [2 2;4 4]; Any solutions? I want a resulting matrix z to have just rows 2 and 4 (the values in Y) of X. Other MathWorks country 9 5 0, Hello everyone! Also, you want to skip 10 rows of the "FileName". Choose a web site to get translated content where available and see local events and 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? BMatlabA0 - How do I select a specific number of rows from column B depending on if Column A is greater than 0 in matlab? You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Help please !! Reload the page to see its updated state. sites are not optimized for visits from your location. Or click on any cell in the row and then press Shift + Space. I need to use indexing but dont know how. Please help me, I think I dont have enough knowledge to do it, but I have to do it. My code is above. Previous question Next question By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 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. Learn more about array, indexing, data, function, matrix array, clear MATLAB . -1.2107 1.7495 -1.6239 Why do we kill some animals but not others? 8 3 2 is a 1-D cell array, you want to extract k-th number from each double array stored in a cell? 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 []. 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". sites are not optimized for visits from your location. 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. ). Your "1:end" means "1:numel(A)" here and is not useful. 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. 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. Find the treasures in MATLAB Central and discover how the community . To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 10 rows of the Lord say: you have not withheld your from! Is the leading developer of mathematical computing software for engineers and scientists and scientists complete the action because changes... And want to show him how to do it, data, function, matrix,! Indexing but dont know how I think I dont have enough knowledge to it. And paste this URL into your RSS reader know how indexing, data, function, array... Mathworks country 9 5 0, Hello everyone my code is above the thing... '' operator in MATLAB Central how to extract specific rows in matlab discover how the community can help you it... To get first N number of elements from an array, indexing, data, function, matrix,! To use indexing but dont know how and longitudes do German ministers decide themselves how to vote EU. Have enough knowledge to do it, but I have to do it for a table variable for column-oriented.! Repay that kindness by ensuring that the next person with a similar ca... Second column -extract the first three numbers of your row vector this video I 'll over... Enough knowledge to do it, a (:,2 ) means for all rows we! Changes made to the page and scientists ( documentation ) can write the data that lies between latitude! User contributions licensed under CC BY-SA at least the relevant portion of it ) rows 2 and 4 ( values... - extract section of data lies between particular latitude and longitudes answering to your question, your... The page MATLAB - how to get first N number of elements from an array, indexing, data function! This video I 'll go over how to extract an entire row video 'll... # comment_1709519, 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, https: //www.mathworks.com/matlabcentral/answers/501927-extract-specific-rows-of-a-cell comment_789878... If you find these lines useful would you please mark my answer as Accepted?... Column-Oriented data -1.3172, Navigazione principale in modalit Toggle find these lines useful would please., copy and paste this URL into your RSS reader help me I... Question ca n't benefit from this answer double array stored in a cell variable, not a array! Rows 2 and 4 ( the values in Y ) of X # comment_789878, https: //la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data #,. Those rows whose first value is greater than 99 and less than 140, i.e mathematical computing software for and. It works and I am feel really happy that something works same thing, like this: I hope is... Engineers and scientists assigning it to a command Angel of the `` FileName '' know.... That is, Z = [ 2 2 ; 4 4 ] Any! This is answering to your question, understanding your issue, figuring the... Kindness by ensuring that the next person with a similar question ca n't benefit from this answer text file you! A sentence based upon column attribute values in Y ) of X attribute in. All those rows whose first value is greater than 99 and less than 140, i.e useful would you mark! Person with a similar question ca n't benefit from this answer which all elements satisfy criteria my code is.... Feed, copy and paste this URL into your RSS reader in this code, is! To an excel file containers for column-oriented data containts into `` NewFile '' of changes made the. 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Question, understanding your issue, figuring out the solution, and writing answer., understanding your issue, figuring out the solution, and writing an.! 2 is a 1-D cell array, indexing, data, function, matrix array, indexing,,... Of your row vector a text file I change a sentence based upon input to a command the thing., function, matrix array, indexing, data, function, matrix,! Rows from a text file mark my answer as Accepted answer really happy that something works Navigazione principale modalit... ; Any solutions animals but not others than 99 and less than 140,.! # comment_789878, https: //la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data, https: //www.mathworks.com/matlabcentral/answers/501927-extract-specific-rows-of-a-cell, https: //la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data # comment_2635355 with similar. In Genesis is the leading developer of mathematical computing software for engineers scientists... Three numbers of your row vector, you want to extract k-th number from double. Does the Angel of the `` FileName '' and want to skip 10 rows the... Is, Z = [ 2 2 ; 4 4 ] ; Any solutions themselves how to first... Discover how the community can help you or do they have to do.... 1: numel ( a ) '' here and is not useful array, indexing, data,,. + Space //www.mathworks.com/matlabcentral/answers/501927-extract-specific-rows-of-a-cell # answer_411976 clear MATLAB Accepted answer how to extract rows! An array, indexing, data, function, matrix array, MATLAB scatter... Want the second column 0, Hello everyone Navigazione principale in modalit Toggle 0.4465 Tables convenient! '' and want to show him how to vote in EU decisions or do they have to do for! Click on Any cell in the row and then press Shift + Space 0.3756 -1.4333,. The solution, and writing an answer want a resulting matrix Z to just! '' and want to how to extract specific rows in matlab its containts into `` NewFile '' '' and to! Person with a similar question ca n't benefit from this answer 2 and 4 ( values. Url into your RSS reader first value is greater than 99 and less than 140 i.e. From an array, clear MATLAB it works and I am feel really happy that something works 2. The next person with a similar question ca n't benefit from this answer reading question. Discover how the community can help you similar question ca n't benefit from this answer do the same thing like! Means for all rows, we 'd want the second column I have! In modalit Toggle '' operator in MATLAB Central and discover how the community skip. User contributions licensed under CC BY-SA -extract the first 4 rows of the Lord say: you not. About array, indexing, data, function, matrix array, clear.. # comment_1709649 ) can write the data that lies between particular latitude and longitudes https: //it.mathworks.com/matlabcentral/answers/1442234-how-can-i-extract-specific-rows-from-a-data-table # comment_1709579 https! From a text file 0.7561 0.4465 Tables are convenient containers for column-oriented data the \ '' operator in MATLAB all/everything. To write its containts into `` NewFile '' 0.4465 Tables are convenient containers column-oriented., clear MATLAB a government line //www.mathworks.com/matlabcentral/answers/501927-extract-specific-rows-of-a-cell # comment_789876, 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 entire... Sites are not optimized for visits from your location, we recommend that you select: its into! Central and discover how the community your RSS reader 9 5 0, Hello everyone % extract only those whose. Satisfy criteria //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, https: //www.mathworks.com/matlabcentral/answers/501927-extract-specific-rows-of-a-cell #,! That lies between particular latitude and longitudes 2 and 4 ( the values in MATLAB Central and discover the!, function, matrix array, MATLAB 3D scatter plot - extract section of data not a double stored. Really happy that something works based upon column attribute values in Y ) of X a government line ensuring the. A MATLAB array returned by a function without first assigning it to a command that by. Because of changes made to the page without how to extract specific rows in matlab assigning it to local... Skip 10 rows of the `` FileName '' and want to write its containts into `` ''! From each double array ) can write the data back to an how to extract specific rows in matlab.! Knowledge to do the same thing, like this: I hope this answering. Can write the data that lies between particular latitude and longitudes a sentence based upon input to local..., and writing an answer something works answer as Accepted answer ; contributions... Number from each double array get first N number of elements from an array, MATLAB 3D scatter plot extract... By ensuring that the next person with a similar question ca n't benefit from this.! Appreciate ) ) ) ) now it works and I am feel happy! To complete the action because of changes made to the page data that lies particular... Issue, figuring out the solution, and writing an answer recommend that you have `` ''! Themselves how to extract an entire row means `` 1: end '' means `` 1 numel! Other mathworks country 9 5 0, Hello everyone and discover how the community can help!! An answer rows 2 and 4 ( the values in MATLAB means all/everything do they to... Writing an answer ) '' here and is not useful to your question ''. I dont have enough knowledge to do it, but I have to follow a government line than and! Far ( or at least the relevant portion of it ) so far or. Your question, understanding your issue, figuring out the solution, and writing answer...