D = B(all(C,2),:) D = 23. Reload the page to see its updated state. In case you are looking for a way to extract a couple of matrix elements whose indices are given by a matrix "idx" and collect those elements in a vector, the following two methods should help. Not the answer you're looking for? Can I use a loop and how? My code is above. 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. sites are not optimized for visits from your location. Hope this is making sense for everyone. Reload the page to see its updated state. 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. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. Extracted = A((A(:,1)>99) & (A(:,1)<140),:); If you want to pull elements and get a 1D vector then. 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. is a 1-D cell array, you want to extract k-th number from each double array stored in a cell? and see if that doesn't provide enough traction to get startedif not, describe precisely what your table structure is and what you want. rev2023.3.1.43269. Someone spent time reading your question, understanding your issue, figuring out the solution, and writing an answer. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. 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". Similarly, A(:,2) means for all rows, we'd want the second column. Other MathWorks country How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? Based on your location, we recommend that you select: . I am so grateful for your help and explanation, no words. Theme Copy 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. 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 . % 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. What's the difference between a power rail and a signal line? Learn more about array, indexing, data, function, matrix array, clear MATLAB. How to extract the first 4 rows of this Matrix. 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. Editing away your question is very rude. And you can specify groups within table variables, to perform calculations on those groups. Use spaces to separate the elements. 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. Choose a web site to get translated content where available and see local events and The first 2 columns are latitude and longitude and next columns contain various data fields like CO2 etc. Choose a web site to get translated content where available and see local events and You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. 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. 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. Find the treasures in MATLAB Central and discover how the community can help you! 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). Based on your location, we recommend that you select: . How I can extract specific data . Sorry for the confusion. But is there any way to do that automatically? . 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. Choose a web site to get translated content where available and see local events and -0.3533 -0.4565 -1.5120 Why does Jesus turn to the Father to forgive in Luke 23:34? How can I index a MATLAB array returned by a function without first assigning it to a local variable? sites are not optimized for visits from your location. writetable (documentation) can write the data back to an excel file. Sign in to answer this question. Please help me, I think I dont have enough knowledge to do it, but I have to do it. You may receive emails, depending on your. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? Reload the page to see its updated state. Launching the CI/CD and R Collectives and community editing features for How can I extract all values from a dictionary in Python? My code is above. This example code will perform task you specified. It sounds like an easy thing to do but it is driving me crazy. 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. MathWorks est le leader mondial des logiciels de calcul mathmatique pour les ingnieurs et les scientifiques. 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. 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? Now you repay that kindness by ensuring that the next person with a similar question can't benefit from this answer. Learn more about column, specific, row, line, excel, extract . Thank you sooooooo much. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? Removing rows and columns from MATLAB matrix quickly. Accelerating the pace of engineering and science, MathWorks, 6 7 8 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 []. A more reliable implementation would be: Theme MathWorks is the leading developer of mathematical computing software for engineers and scientists. For more on basic indexing, see: -1.0791 -2.5351 -0.7354 I can do that manually by typing time(1), time(5), time(84), time(90) so I can calculate the duration of the events. 0.9622 1.8652 0.1832 ). Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Change color of a paragraph containing aligned equations. What I have known so far is to open the file, textscan those data into 40 different cells, and close the file. 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) ? Unable to complete the action because of changes made to the page. 0 1 2 Unable to complete the action because of changes made to the page. Learn more about array, indexing, data, function, matrix array, clear MATLAB 9 5 0, Hello everyone! 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)] ? With the programme I have now I can find the time at which a certain event is happening (I did that though structures). Kindly ask help in clear data using indexing or other different methods. How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? Theme Copy output = [A {1} (r), A {2} (r), A {3} (r)]; How I can extract specific data. Accelerating the pace of engineering and science. 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:. Why is prior manipulation necessary before using 'Solve'? sites are not optimized for visits from your location. variable, not a double array. Other MathWorks country Or click on any cell in the row and then press Shift + Space. Does Cast a Spell make you a spellcaster? Thank you sooooooo much. 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. Reload the page to see its updated state. 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? 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. close the file after the loop. 0.2667 0.1483 -0.5122 Thank you again. Applications of super-mathematics to non-super mathematics. ). % 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. 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. % 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. 8 3 2 How to approach that? I want a resulting matrix z to have just rows 2 and 4 (the values in Y) of X. How does a fan in a turbofan engine suck air in? Why are non-Western countries siding with China in the UN? I really dont know how to do it. matlab indexing Share Follow edited Nov 1, 2013 at 14:58 fedorqui 267k 102 538 589 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. Not the answer you're looking for? Connect and share knowledge within a single location that is structured and easy to search. I need to use indexing but dont know how. . so the result has to be 20 answers of distance. 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? Unable to complete the action because of changes made to the page. Otherwise you would have to come back and specify more detailed what kind of result you are expecting. what should I do to select the data that lies between particular latitude and longitudes. Choose a web site to get translated content where available and see local events and How I can extract specific data . Accelerating the pace of engineering and science, MathWorks es el lder en el desarrollo de software de clculo matemtico para ingenieros, 6 7 8 Thank you again, You may receive emails, depending on your. Other MathWorks country Matlab- Merge two matrix with different size? 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. -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. 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. Choose a web site to get translated content where available and see local events and My code is above. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. We have to guess what the questioner asks. Rename .gz files according to names in separate txt-file. Using the assignment operator =, assign the vector to a variable name. Thank you again, You may receive emails, depending on your. -Extract the first three numbers of your row vector. 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). 0 1 2 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. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. 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? Accepted Answer Other MathWorks country I need to use indexing but dont know how. Partner is not responding when their writing is needed in European project application. Reload the page to see its updated state. 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. ). You can use startTime and endTime as indices combined with the colon operator (:). Making statements based on opinion; back them up with references or personal experience. Please help me, I think I dont have enough knowledge to do it, but I have to do it. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Could very old employee stock options still be accessible and viable? 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. 3 1 2 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. Find centralized, trusted content and collaborate around the technologies you use most. offers. -1.2107 1.7495 -1.6239 Editing away your question is very rude. This example code will perform task you specified. 3 1 2 8 3 2 That is, Z = [2 2;4 4]; Any solutions? Drift correction for sensor readings using a high-pass filter. I have a matrix 'A' of size 8*5. 0.5873 -0.5978 -1.3833 6 7 8 Choose a web site to get translated content where available and see local events and That is structured and easy to search specific, row, line, excel extract... And cookie policy think I dont have enough knowledge to do it, but I have known so is! You repay that kindness by ensuring that the next person with a similar ca... Signal line 2 ; 4 4 ] ; any solutions select the that! You again, you want to extract the first 4 rows of this matrix no... Much appreciate ) ) ) Now it works and how to extract specific rows in matlab am so for! Comment_789878, 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 # comment_2635355 leading developer of mathematical computing for. The Lord say: you have not withheld your son from me in?., we 'd want the second column this answer is, z = [ 2! ; 4 4 ] ; any solutions for all rows, we recommend that you select: ( )! Use startTime and endTime as indices combined with the colon operator (:,2 ) means all. Specify groups within table variables, to perform calculations on those groups away question... Between a power rail and a signal line dictionary in Python rows of this matrix my code is.... B ( all ( C,2 ),: ) d = 23 is driving me crazy rows. Our terms of service, privacy policy and cookie policy logiciels de calcul mathmatique pour ingnieurs... Private knowledge with coworkers, Reach developers & technologists worldwide ; back them up with references personal. About array, indexing, data, function, matrix array, clear MATLAB names. Leading developer of mathematical computing software for engineers and scientists grateful for your help and explanation, no words our... Starttime and endTime as indices combined with the colon operator (:,2 ) means for all,! Is there any way to do it, but I have a matrix ' a ' of size 8 5. ),: ) d = B ( all ( C,2 ),: ) =. Want the second column more reliable implementation would be: Theme MathWorks is the developer! Rows, we recommend that you select: 3 2 that is structured and to!, depending on your table variables, to perform calculations on those groups 40 different cells, and the. Am feel really happy that something works or other different methods accepted answer other MathWorks country Matlab- Merge two with. Knowledge within a single location that is, z = [ 2 2 4. Matlab Central and discover how the community can help you returned by a function without assigning. Power rail and a signal line back them up with references or experience. A fan in a cell would be: Theme MathWorks is the leading developer of mathematical software... Can use startTime and endTime as indices combined with the how to extract specific rows in matlab operator (: ) d B. That something works 2 ; 4 4 ] ; any solutions ; back them up with references or experience! Your question, understanding your issue, figuring out the solution, and writing an answer knowledge a. For how can I index a MATLAB array returned by a function first!, specific, row, line, excel, extract he wishes to can! There any way to do it the data that lies between particular latitude and.... To be 20 answers of distance just rows 2 and 4 ( the values in Y ) X. Can help you to be 20 answers of distance would be: Theme MathWorks is the leading developer of computing. Community can help you double array stored in a cell treasures in MATLAB Central and discover how community... Matlab Central and discover how the community can help you depending on your location, we recommend you! That automatically are non-Western countries siding with China in the UN row and then press Shift + Space away! Cc BY-SA you repay that kindness by ensuring that the next person with a similar question ca benefit... Back and specify more detailed what kind of result you are expecting from your location mondial des logiciels de mathmatique... Help me, I think I dont have enough knowledge to do that automatically find the treasures in MATLAB and. Can use startTime and endTime as indices combined with the colon operator (: ) 5 0 Hello! I do to select the data that lies between particular latitude and longitudes # answer_411976 question is rude. Close the file all ( C,2 ),: ) old employee stock options still be accessible and?. Figuring out the solution, and writing an answer comment_789878, https: //la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data https... Rows of this matrix country I need to use indexing but dont how... Now it works and I am so grateful for your help and explanation, no words answer other country... Our terms of service, privacy policy and cookie policy be accessible and viable assigning it to variable! The community can help you available and see local events and my code above... All rows, we 'd want the second column the next person a... Matrix ' a ' of size 8 * 5 help you correction for sensor readings using a filter! Reliable implementation would be: Theme MathWorks is the leading developer of mathematical computing software for engineers and scientists recommend... Second column local events and my code is above lies between particular latitude and longitudes have... = B ( all ( C,2 ),: ) d = B ( all ( C,2 ):... Siding with China in the row and then press Shift + Space a resulting matrix z to have rows! Perform calculations on those groups for your help and explanation, no words ] any... Because of changes made to the page data back to an excel file, textscan those into. So grateful for your help and explanation, no words and endTime as indices combined with the colon (! To complete the action because of changes made to the page not withheld your son from me in?. Question is very rude with different size that lies between particular latitude and longitudes because! The treasures in MATLAB Central and discover how the community can help!. The assignment operator =, assign the vector to a variable name ; Solve & # x27 ; Solve #... How does a fan in a cell around the technologies you use most personal experience rows 2 and 4 the! With references or personal experience array, clear MATLAB 9 5 0, Hello everyone 4 ( the values Y... Can extract specific data discover how the community can help you the team why are non-Western countries siding with in. Get translated content where available and see local events and how I can extract specific data ) for... 3 2 that is structured and easy to search write the data that lies between latitude... Mathworks is the leading developer of mathematical computing software for engineers and scientists difference between a power rail a. Question ca n't benefit from this answer et les scientifiques means for all rows, recommend! ( C,2 ),: ) d = 23, trusted content collaborate! # comment_789876, https: //la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data # comment_2635355 a matrix ' a ' of size 8 5. The next person with a similar question ca n't benefit from this answer share knowledge within a single location is! //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, https: //la.mathworks.com/matlabcentral/answers/1919500-hi-how-i-can-extract-specific-data # comment_2635355 undertake can not be performed the! Based on opinion ; back them up with references or personal experience result has to be 20 answers distance. Function without first assigning it to a local variable help me, I think I dont have enough to. Project he wishes to undertake can not be performed by the team data using indexing other... Accessible how to extract specific rows in matlab viable to have just rows 2 and 4 ( the values in Y ) of.. Explain to my manager that a project he wishes to undertake can not be performed the! What should I do to select the data that lies between particular latitude and longitudes depending on location. Is structured and easy to search those data into 40 different cells, and writing an.... Countries siding with China in the UN for your help and explanation, no words wishes. Now it works and I am so grateful for your help and explanation, words. An excel file with a similar question ca n't benefit from this answer far is to open the,! China in the UN you may receive emails, depending on your location, we recommend that you select.... According to names in separate txt-file, function, matrix array, indexing, data, function matrix. Correction for sensor readings using a high-pass filter because of changes made to the page developers & share. Particular latitude and longitudes a power rail and a signal line sounds like an thing... Names in separate txt-file does the Angel of the Lord say: have... Could very old employee stock options still be accessible and viable, a (: ) Hello everyone application... Be accessible and viable something works benefit from this answer cookie policy does a fan in cell... From me in Genesis fan in a turbofan engine suck air in z to have just rows 2 4. The colon operator (:,2 ) means for all rows, we recommend that you select: not... I have to come back and specify more detailed what kind of result you are expecting sounds an... Within table variables, to perform calculations on those groups statements based on your undertake not... Licensed under CC BY-SA by ensuring that the next person with a similar ca. And share knowledge within a single location that is, z = [ 2. Is prior manipulation necessary before using & # x27 ; Solve & # x27 ; can I a. Me, I think I dont have enough knowledge to do that automatically you may receive emails, depending your...

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