I really dont know how to do it. Do you want to show him how to do it for a table variable? Thank you sooooooo much. You can use startTime and endTime as indices combined with the colon operator (:). Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. How to extract specific column and row and put. 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. Connect and share knowledge within a single location that is structured and easy to search. Find the treasures in MATLAB Central and discover how the community can help you! Does Cast a Spell make you a spellcaster? 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. . Choose a web site to get translated content where available and see local events and Other MathWorks country . Much much appreciate )))) Now it works and I am feel really happy that something works. 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. 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) ? ). D = B(all(C,2),:) D = 23. 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. For more on basic indexing, see: Use spaces to separate the elements. Why is MATLAB so fast in matrix multiplication? Also, you want to skip 10 rows of the "FileName". This way, you can read the files one at a time, and write the content to a single file. % 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. 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. Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer. 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. 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. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. 9 5 0, Hello everyone! Find the treasures in MATLAB Central and discover how the community can help you! My code is above. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Like all those rows whose first value is greater than 99 and less than 140, i.e. 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. offers. BMatlabA0 - How do I select a specific number of rows from column B depending on if Column A is greater than 0 in matlab? How can I index a MATLAB array returned by a function without first assigning it to a local variable? Based on your location, we recommend that you select: . My code is above. 6 7 8 but A{2}(4) give me only second element of first column. 0.2667 0.1483 -0.5122 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 undermine character creation; cv2 resize keep aspect ratio I am so grateful for your help and explanation, no words. Sorry for the confusion. Acceleration without force in rotational motion? Please help me, I think I dont have enough knowledge to do it, but I have to do it. Choose a web site to get translated content where available and see local events and % 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). Jordan's line about intimate parties in The Great Gatsby? Thank you again, You may receive emails, depending on your. But is there any way to do that automatically? 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. Reload the page to see its updated state. 8 3 2 Unable to complete the action because of changes made to the page. 3 1 2 % extract only those rows which all elements satisfy criteria. -1.2107 1.7495 -1.6239 You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Thanks, Alberto Best Answer Hello, Here is an solution that you can refer, 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. Theme Copy Based on your location, we recommend that you select: . 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. I needed to understand what you want. Not the answer you're looking for? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Choose a web site to get translated content where available and see local events and -1.0791 -2.5351 -0.7354 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. Thank you sooooooo much. 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. And you can specify groups within table variables, to perform calculations on those groups. 9 5 0, Hello everyone! 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? Tables are convenient containers for column-oriented data. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? I need to use indexing but dont know how. 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. -Change the value of the 2nd element in the first row of the matrix to 0, and the 1st element in the 2nd row of the matrix to 0. You may receive emails, depending on your. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Accepted Answer Applications of super-mathematics to non-super mathematics. variable, not a double array. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. D = B(all(C,2),:) . 9 5 0, Hello everyone! That is. Selecting specific rows of a matrix in Matlab. Your "1:end" means "1:numel(A)" here and is not useful. Other MathWorks country 9 5 0, Hello everyone! Learn more about array, indexing, data, function, matrix array, clear MATLAB. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. so the result has to be 20 answers of distance. -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. Based on your location, we recommend that you select: . Find the treasures in MATLAB Central and discover how the community can help you! % extract only those rows which all elements satisfy criteria. 1.8556 -0.3747 -0.2835 offers. sites are not optimized for visits from your location. I need to use indexing but dont know how. sites are not optimized for visits from your location. 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). Kindly ask help in clear data using indexing or other different methods. Much much appreciate )))) Now it works and I am feel really happy that something works. close the file after the loop. Sign in to answer this question. 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'; Accelerating the pace of engineering and science, MathWorks es el lder en el desarrollo de software de clculo matemtico para ingenieros, 6 7 8 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. I really dont know how to do it. With the programme I have now I can find the time at which a certain event is happening (I did that though structures).
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