how to extract specific rows in matlab
Matlab- Merge two matrix with different size? 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: . How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? 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 Learn more about array, indexing, data, function, matrix array, clear MATLAB My code is above. How to extract specific rows from a text file? sites are not optimized for visits from your location. Thanks for contributing an answer to Stack Overflow! 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'; Find the treasures in MATLAB Central and discover how the community can help you! Making statements based on opinion; back them up with references or personal experience. What I have known so far is to open the file, textscan those data into 40 different cells, and close the file. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. Jordan's line about intimate parties in The Great Gatsby? Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? Based on your location, we recommend that you select: . Other MathWorks country Unable to complete the action because of changes made to the page. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. 3 1 2 -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? You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Kindly ask help in clear data using indexing or other different methods. Accelerating the pace of engineering and science. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Kindly ask help in clear data using indexing or other different methods. Rename .gz files according to names in separate txt-file. I need to use indexing but dont know how. 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. 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. And you can specify groups within table variables, to perform calculations on those groups. My code is above. Does Cast a Spell make you a spellcaster? You may receive emails, depending on your. 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. We have to guess what the questioner asks. sites are not optimized for visits from your location. How can I change a sentence based upon input to a command? Accelerating the pace of engineering and science. Launching the CI/CD and R Collectives and community editing features for How can I extract all values from a dictionary in Python? Thank you again, You may receive emails, depending on your. My code is above. 0 1 2 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. Why do we kill some animals but not others? 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). Editing away your question is very rude. Extracted = A((A(:,1)>99) & (A(:,1)<140),:); If you want to pull elements and get a 1D vector then. Reload the page to see its updated state. I need to use indexing but dont know how. I really dont know how to do it. Reload the page to see its updated state. offers. 8 3 2 To learn more, see our tips on writing great answers. 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. 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. -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. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. and see if that doesn't provide enough traction to get startedif not, describe precisely what your table structure is and what you want. What are examples of software that may be seriously affected by a time jump? Thank you sooooooo much. 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) 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. returns a new table. Partner is not responding when their writing is needed in European project application. offers. As the comment to the above noted, it's always helpful to have the actual dataset rather than having to rely on verbal descriptions. D = B(all(C,2),:) . Does Cast a Spell make you a spellcaster? You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. 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. This way, you can read the files one at a time, and write the content to a single file. How to extract the first 4 rows of this Matrix. 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. Removing rows and columns from MATLAB matrix quickly. I am so grateful for your help and explanation, no words. 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. Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer. 0.2667 0.1483 -0.5122 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. D = B(all(C,2),:) D = 23. Why are non-Western countries siding with China in the UN? close the file after the loop. 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". Unable to complete the action because of changes made to the page. Accelerating the pace of engineering and science, MathWorks es el lder en el desarrollo de software de clculo matemtico para ingenieros, 6 7 8 undermine character creation; cv2 resize keep aspect ratio Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? I really dont know how to do it. Thanks, Alberto Best Answer Hello, Here is an solution that you can refer, Previous question Next question Editing away your question is very rude. . Asking for help, clarification, or responding to other answers. You can access table data by row, by variable, or by variable name. Other MathWorks country You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Find the treasures in MATLAB Central and discover how the community . You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Choose a web site to get translated content where available and see local events and This example code will perform task you specified. Start Hunting! How I can extract specific data . Hi! Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. In this code, it is supposed that you have "FileName" and want to write its containts into "NewFile". matlab Share Follow Can I use a loop and how? 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. 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. Find the treasures in MATLAB Central and discover how the community can help you! Could very old employee stock options still be accessible and viable? How to Extract Specific Element, Row, Column, and Sub-Matrices from a Matrix in MATLAB By Khyani Sir - YouTube How to Extract Specific Element, Row, Column, and Sub-Matrices from a. I want a resulting matrix z to have just rows 2 and 4 (the values in Y) of X. Editing away your question is very rude. Matlab - How to select specific rows based upon column attribute values in matlab? 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. 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 I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). Other MathWorks country 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)). 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:. . Based on your location, we recommend that you select: . By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. ). How can I change a sentence based upon input to a command? 0.9622 1.8652 0.1832 ). Accepted Answer It's nice to meet you. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. MathWorks est le leader mondial des logiciels de calcul mathmatique pour les ingnieurs et les scientifiques. Unable to complete the action because of changes made to the page. How I can extract specific data . Based on your location, we recommend that you select: . I can do that manually by typing time(1), time(5), time(84), time(90) so I can calculate the duration of the events. 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. 0.5873 -0.5978 -1.3833 Why does Jesus turn to the Father to forgive in Luke 23:34? That is. Change color of a paragraph containing aligned equations. a (x) doesn't work. Very often, the table, array and matrix are misused in question. offers. 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. 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. Any other idea?? Hope this is making sense for everyone. 8 3 2 How to extract the first 4 rows of this Matrix. This example code will perform task you specified. 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. writetable (documentation) can write the data back to an excel file. But is there any way to do that automatically? Selecting specific rows of a matrix in Matlab. 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 []. Kindly ask help in clear data using indexing or other different methods. 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. 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? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Other MathWorks country I really dont know how to do it. 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. My code is above. Not the answer you're looking for? Please help me, I think I dont have enough knowledge to do it, but I have to do it. % extract only those rows which all elements satisfy criteria. I have a series of datasets each one about 1032 x 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. 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. Similarly, A(:,2) means for all rows, we'd want the second column. 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. Kindly ask help in clear data using indexing or other different methods. 3 1 2 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. % 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. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. To extract any row from a matrix, use the colon operator in the second index position of your matrix. I need to use indexing but dont know how. Reload the page to see its updated state. Select the row number to select the entire row. 3 1 2 By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Connect and share knowledge within a single location that is structured and easy to search. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. offers. OK. Then, to avoid misunderstanding, let's use a simple example. -1.2107 1.7495 -1.6239 Learn more about array, indexing, data, function, matrix array, clear MATLAB . Expert Answer 1st step All steps Answer only Step 1/5 1. Editing away your question is very rude. In this video I'll go over how to extract an entire row or column using MATLAB. if you find these lines useful would you please mark my answer as Accepted Answer? or 1-D (1-by-N or N-by-1) ? I really dont know how to do it. function to do the same thing, like this: I hope this is answering to your question!
