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. In this video I'll go over how to extract an entire row or column using MATLAB. Thanks for contributing an answer to Stack Overflow! 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. Kindly ask help in clear data using indexing or other different methods. 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 Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. How I can extract specific data . Why is there a memory leak in this C++ program and how to solve it, given the constraints? This example code will perform task you specified. Use spaces to separate the elements. You can use startTime and endTime as indices combined with the colon operator (:). . returns a new table. This example code will perform task you specified. 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. Choose a web site to get translated content where available and see local events and My code is above. Based on your location, we recommend that you select: . 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. 3 1 2 0 1 2 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. 0.3756 -1.4333 -1.3172, Navigazione principale in modalit Toggle. 9 5 0, Hello everyone! MathWorks est le leader mondial des logiciels de calcul mathmatique pour les ingnieurs et les scientifiques. Thank you sooooooo much. 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. ). 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. The variables in a table can have different data types, but must have the same number of rows. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer. Based on your location, we recommend that you select: . 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) Kindly ask help in clear data using indexing or other different methods. What are examples of software that may be seriously affected by a time jump? How to approach that? I really dont know how to do it. How can I change a sentence based upon input to a command? Tables are convenient containers for column-oriented data. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. 1.8556 -0.3747 -0.2835 You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Your "1:end" means "1:numel(A)" here and is not useful. I am so grateful for your help and explanation, no words. 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 I needed to understand what you want. To select non-adjacent rows or columns, hold Ctrl and select the row or column numbers. 0.2667 0.1483 -0.5122 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. Hi! 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. Accelerating the pace of engineering and science. Accelerating the pace of engineering and science, MathWorks es el lder en el desarrollo de software de clculo matemtico para ingenieros, 6 7 8 8 3 2 . Accelerating the pace of engineering and science, MathWorks, 6 7 8 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. 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. How I can extract specific data . This way, you can read the files one at a time, and write the content to a single file. 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. 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. Reload the page to see its updated state. 3 1 2 8 3 2 A more reliable implementation would be: Theme How to extract specific column and row and put. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Much much appreciate )))) Now it works and I am feel really happy that something works. Can you help me? -Extract the first three numbers of your row vector. 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. Please help me, I think I dont have enough knowledge to do it, but I have to do it. How can I change a sentence based upon input to a command? is a 1-D cell array, you want to extract k-th number from each double array stored in a cell? % 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. 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. I need to use indexing but dont know how. 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. How to get first N number of elements from an array, Matlab 3D scatter plot - extract section of data. Other MathWorks country 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 []. Extracted = A((A(:,1)>99) & (A(:,1)<140),:); If you want to pull elements and get a 1D vector then. How I can extract specific data . OK. Then, to avoid misunderstanding, let's use a simple example. Why are non-Western countries siding with China in the UN? Any other idea?? matlab Share Follow Why did the Soviets not shoot down US spy satellites during the Cold War. 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. 0 1 2 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. I assume the below should work. % extract only those rows which all elements satisfy criteria. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. It sounds like an easy thing to do but it is driving me crazy. close the file after the loop. Accelerating the pace of engineering and science. 0.5873 -0.5978 -1.3833 Start Hunting! I am so grateful for your help and explanation, no words. The first 2 columns are latitude and longitude and next columns contain various data fields like CO2 etc. matthew miller state department; river roast chicago wedding; Main Menu. Find the treasures in MATLAB Central and discover how the community can help you! How does a fan in a turbofan engine suck air in? Sign in to answer this question. Other MathWorks country Find the treasures in MATLAB Central and discover how the community can help you! 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. We have to guess what the questioner asks. Choose a web site to get translated content where available and see local events and Also the \":\" operator in MATLAB means all/everything. What I have known so far is to open the file, textscan those data into 40 different cells, and close the file. Connect and share knowledge within a single location that is structured and easy to search. My code is above. Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer. MathWorks is the leading developer of mathematical computing software for engineers and scientists. I am so grateful for your help and explanation, no words. Unable to complete the action because of changes made to the page. Applications of super-mathematics to non-super mathematics. 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. Accelerating the pace of engineering and science. writetable (documentation) can write the data back to an excel file. Much much appreciate )))) Now it works and I am feel really happy that something works. offers. Not the answer you're looking for? 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. 3 1 2 D = B(all(C,2),:) . Find the treasures in MATLAB Central and discover how the community . 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. Can you post your code so far (or at least the relevant portion of it)? Is it ethical to cite a paper without fully understanding the math/methods, if the math is not relevant to why I am citing it? That is, Z = [2 2;4 4]; Any solutions? I need to use indexing but dont know how. 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, 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)] ? 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://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. I really dont know how to do it. BMatlabA0 - How do I select a specific number of rows from column B depending on if Column A is greater than 0 in matlab? 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Based on your location, we recommend that you select: . Unable to complete the action because of changes made to the page. Do you want to show him how to do it for a table variable? I need to use indexing but dont know how. Other MathWorks country Does Cast a Spell make you a spellcaster? Or click on any cell in the row and then press Shift + Space. 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. Much much appreciate )))) Now it works and I am feel really happy that something works. 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'; Unable to complete the action because of changes made to the page. Drift correction for sensor readings using a high-pass filter. Matlab - How to select specific rows based upon column attribute values in matlab? Based on your location, we recommend that you select: . 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? rows 2, 3 and 4. Expert Answer 1st step All steps Answer only Step 1/5 1. 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. Thank you again, You may receive emails, depending on your. Making statements based on opinion; back them up with references or personal experience. 0 Comments Sign in to comment. 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. Reload the page to see its updated state. What's the difference between a power rail and a signal line? How to extract the first 4 rows of this Matrix. I can do that manually by typing time(1), time(5), time(84), time(90) so I can calculate the duration of the events. offers. How can I index a MATLAB array returned by a function without first assigning it to a local variable? Please help me, I think I dont have enough knowledge to do it, but I have to do it. And you can specify groups within table variables, to perform calculations on those groups. -1.0791 -2.5351 -0.7354 Reload the page to see its updated state. 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. Choose a web site to get translated content where available and see local events and I have a matrix 'A' of size 8*5. Also, you want to skip 10 rows of the "FileName". Selecting specific rows of a matrix in Matlab. % 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 1 2 sites are not optimized for visits from your location. Find centralized, trusted content and collaborate around the technologies you use most. Based on your location, we recommend that you select: . How did Dominion legally obtain text messages from Fox News hosts? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. How I can extract specific data. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? variable, not a double array. Sorry for the confusion. Select one or more rows and columns Or click on any cell in the column and then press Ctrl + Space. Reload the page to see its updated state. rev2023.3.1.43269. offers. This example code will perform task you specified. This example code will perform task you specified. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). Does Cast a Spell make you a spellcaster? Choose a web site to get translated content where available and see local events and That is. 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.

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