something like: A = new_matrix new_matrix is generated out of A by taking only the rows you want. something like: Sign in to comment. I have a problem with removing surplus rows in the end of the matrix. All rights reserved. I would like to delete the, say,the bottom 2 rows to get the new M=[3 6 3 7 9 11; 1 4 6 8 98 3]. Thank you so much. Obtenir MATLAB; Produits; Solutions; Le monde acadmique; Support; Variable appears to change size on every loop iteration - what. Is this an at-all realistic configuration for a DHC-2 Beaver? Compute mean value over a sliding window in MATLAB, Find each element that is less than some element to its right, MATLAB: Remove n last rows from matrix without loop, Remove zeros column and rows from a matrix matlab, how to remove only the desired row from the matrix and return the rest rows of a matrix using matlab, Extract rows from matrix in individual vectors without a for loop, matlab: delete zero rows from each matrix in cell-array without loop, Recover matrix X using pointers from rows in X to rows in matrix Y without doing loops in MATLAB, how to remove unwanted colors from a Matlab RGB image frame, without using a loop, Matlab: Filling up matrix rows using moving intervals from a column vector without a for loop, Removing rows and columns from MATLAB matrix quickly, Removing rows and columns from matrix in Matlab, Accessing the last few rows of a matrix using matlab, remove rows that contain zeros from cells array in matlab, Extract data from MATLAB matrix without for-loop, matlab remove for loop in matrix computation, How to remove Inf values from a matrix retaining its size in Matlab, Matrix multiplication of row and column without for loop in matlab, Build matrix with vectors resulting from indexed kronecker products without a for loop. shift the elements of a vector by non-integer shift in matlab; im2double giving 1*1 matrix on applying to 256*256 matrix in matlab R2014a; Featured post. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Especially for larger blocks, there are often ways to optimize that at the machine level, such as by copying full system "pages" of memory using DMA. remove_button_Callback(hObject, eventdata, handles), % hObject handle to remove_button (see GCBO), % eventdata reserved - to be defined in a future version of MATLAB, % handles structure with handles and user data (see GUIDATA), % By default the remove button will only remove the last row in the. For example, suppose that I have the matrix M=[3 6 3 7 9 11 5 34; 1 4 6 8 98 3 4 45]. How to sort the rows of a multidimensional matrix in Matlab without changing the order of the elements in the first column? You may receive emails, depending on your. MATLAB arranges memory in columns and the first entry for the next column is stored in memory directly after the last entry for this column. I have a problem with removing surplus rows in the end of the matrix. how to remove first row of numpy array. In that, there is a "pushbutton" if the user wants to remove the rows. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. new_matrix is generated out of A by taking only the rows you want. With Sean's version to write to tst then the last rows would be thrown away. Lets say A is your 2x5 matrix. So should I understand that in Matlab rows and columns are not created equal? For example, suppose I want to delete the last two rows of a matrix: This works, but it seems quite expensive: "Elapsed time is 0.001152 seconds." Thanks. since your matrix only has zeros and ones (as a result of the "<" operator) you got a weird result. ", Compared to my way: "Elapsed time is 0.001152 seconds". To answer your question, you need to replace the matrix with a smaller matrix. In general, I need to remove rows that contain a specific elements in a specific column, without using a loop. BTW, changing these rows to ones is just as easy: Copyright 2022 www.appsloveworld.com. I would like to be able to delete the last n rows of a matrix. Home . Counterexamples to differentiation under integral sign, revisited, Why do some airports shuffle connecting passengers through security again. new_matrix = A (row_indices, :) Where row_indices is the vector of indices you want to keep. sites are not optimized for visits from your location. Where row_indices is the vector of indices you want to keep. FFmpeg incorrect colourspace with hardcoded subtitles. For more info read https://in.mathworks.com/help/matlab/matlab_prog/matlab-operators-and-special-characters.html How to replace a column of a specific value with zeros in Matlab? i knew how to do it, but to do this, you have to have M decleared before, i find myself with this problem all the time in matlab and obviously it is that i am missing something: for example i am calculating a convolution of signals (it is just an example of where i find myself with this issue), %for S1 and h i took simpler examples of arrays to be more clear, %my problem is that i want to cut the O1 to the same size as S1, % and h, as the rest of the convolution is going to be 0, so i would like to do something like this. How to remove the last row in a matrix?. Find centralized, trusted content and collaborate around the technologies you use most. In the last Matlab assignment, when plotting points, we put the points in the rows of a matrix. If any values are less than the value being compared with I want it to delete that entire row. Correct. To build that you can start with a zeros-ones vector and apply find (which will yield the indices with ones). Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. The comma separates the rows specifier from the column specifier. You may receive emails, depending on your. How will that condition be inserted ? I started out with 500,000 data points and im trying to minimize "1:end-2" specified rows from 1 through 2 before the last row. For simple example, let's have a 10x10 matrix A: A=[1:10; 901:910; 201:210; 301:310; 701:710; 401:410; 601:610; 501:510; 801:810; 101:110]; And I want to remove (for better illustration just replace with ones) that rows from fourth to the last, whose third columns contain value higher than 600. MathWorks is the leading developer of mathematical computing software for engineers and scientists. More Answers (6) Peter on 30 Nov 2012 Vote 31 Link Translate Reload the page to see its updated state. 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. The user with the push button, REMOVE can delete all the ROWS. https://www.mathworks.com/matlabcentral/answers/7913-fast-way-to-delete-the-last-n-rows-of-a-matrix, https://www.mathworks.com/matlabcentral/answers/7913-fast-way-to-delete-the-last-n-rows-of-a-matrix#answer_10893, https://www.mathworks.com/matlabcentral/answers/7913-fast-way-to-delete-the-last-n-rows-of-a-matrix#comment_16800, https://www.mathworks.com/matlabcentral/answers/7913-fast-way-to-delete-the-last-n-rows-of-a-matrix#comment_806566, https://www.mathworks.com/matlabcentral/answers/7913-fast-way-to-delete-the-last-n-rows-of-a-matrix#comment_806568, https://www.mathworks.com/matlabcentral/answers/7913-fast-way-to-delete-the-last-n-rows-of-a-matrix#answer_10894, https://www.mathworks.com/matlabcentral/answers/7913-fast-way-to-delete-the-last-n-rows-of-a-matrix#comment_16802, https://www.mathworks.com/matlabcentral/answers/7913-fast-way-to-delete-the-last-n-rows-of-a-matrix#comment_16805, https://www.mathworks.com/matlabcentral/answers/7913-fast-way-to-delete-the-last-n-rows-of-a-matrix#comment_16807. offers. Sign in to comment. could just type. null assignment can have only one non-colon index. I have found that this can be done in the following way. I really appreciate your taking the time to explain this to me. Your way is much faster: "Elapsed time is 0.000032 seconds. Other MathWorks country In MATLAB, you create a matrix by entering elements in each row as comma or space delimited numbers and using semicolons to mark the end of each row. sites are not optimized for visits from your location. Math 75: The matrix of a linear transformation. To answer your question, you need to replace the matrix with a smaller matrix. Does MATLAB java.util have non-hash map/set? Using pwelch to a set of signals: some questions (Matlab), Image rotation by Matlab without using imrotate, Distance between two pixels but belonging to different sets. Why do we use perturbative series if they don't converge? Theme Copy A = rand (2,5) Then to extract the first row, you simply use: Theme Copy V = A (1,:); Hector on 18 Nov 2022 at 16:36 Thank you Sign in to comment. is this making a new one? If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. Find the treasures in MATLAB Central and discover how the community can help you! What I need to do is depup the matrix by removing rows where the first set of coordinates (e.g columns 1 and 2 in a row) are swapped with the second set of coordinates. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. i have complete matlab code for f (x)=x^2 up to selection. Connect and share knowledge within a single location that is structured and easy to search. Start a new MATLAB session without opening the editor window from the last session, MATLAB: find means of other rows in a matrix without loop, Get last row of many matrices (ASCII text files) and create a new matrix from these rows, How to avoid for loop in Matlab when building a new matrix from a database, construct a matrix by removing different elements from an array without loops in matlab, Extracting rows from .mat table using for loop in MATLAB, Equivalent of Matlab's PCA in Python sklearn, Rotate image in Matlab about arbitrary points, Time step computation in Matlab ODE solver, Imagesc function on Matlab: problems in converting 3D shapes in 2D, sum the first n prime reciprocals such that the sum exceeds k (Matlab), Sort all dimensions of a cell array from min to max in MATLAB. For example, create a 4-by-4 matrix and remove the second row. Hello. The dimension of the matrix resulting from a matrix multiplication is the first dimension of the first matrix by the last dimenson of the second matrix. Reload the page to see its updated state. In my code, I will be deleting rows many hundreds of thousands of times. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. A = new_matrix. If you want to remove individual elements then either use a cell array or replace those elements with some obsolete value such as 9999. Confused about how to reshape my data, column for each day. offers. They are stored as two-dimensional arrays in MATLAB. I would like to be able to delete the last n rows of a matrix. confusion between a half wave and a centre tapped full wave rectifier. The comma separates the rows specifier from the column specifier. A matrix which has m rows and n columns is called a matrix of order m n. P-value from Tukey q (studentized range distribution) score. How do I arrange multiple quotations (each with multiple lines) vertically (with a line through the center) so that they're side-by-side? Other MathWorks country A = magic (4) A = 44 16 2 3 13 5 11 10 8 9 7 6 12 4 14 15 1 A (2,:) = [] A = 34 16 2 3 13 9 7 6 12 4 14 15 1 The column specifier is ":" which means "all". To build that you can start with a zeros-ones vector and apply find (which will yield the indices with ones). Now you need to specify the columns since M is a 2-D matrix with both rows and columns. ), and more specifically RowOrderOf([1 2]) go to websitePython. your location, we recommend that you select: . I have found that this can be done in the following way. Reload the page to see its updated state. Unable to complete the action because of changes made to the page. Why is MATLAB so fast in matrix multiplication? Matlab-Matrix - Deletion of Row & Column, You can delete an entire row or column of a matrix by assigning an empty set of square braces [] to that row or column. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. How can I index a MATLAB array returned by a function without first assigning it to a local variable? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Save wifi networks and passwords to recover them after reinstall OS. Convert numeric array to cell array of chars and concat with chars in one line, Confusing syntax for Welch's PSD method in Matlab, Plotting or choosing nth pixel in a binary image MATLAB, How to get the THD value from the THD block in simulink into matlab, is there a way to do implicit differentiation in matlab, Matlab Solve Symbolic Function after rearranging for new subject, How to place a logo in an image using MATLAB. Learn more about guide, array . Nevertheless, for large matrices, MATLAB programs may execute faster if the zeros function is used to set aside storage for a matrix whose elements are to be generated one at a time, or a row or column at a time. Other model components include a regression component to associate the same exogenous predictor variables to each response series, and constant and time . Add a new light switch in line with another switch? "1:end-2" specified rows from 1 through 2 before the last row. A reader asked in a blog comment recently why a vertical line (or edge) shows up in the Fourier transform of an image as a horizontal line. Then I want it to go to the row below it and carry out the same function and so on until the . Do you know if there is a faster way to delete the last n rows of a matrix? Work through this, typing the code into Sage. Make an n x n-1 matrix from 1 x n vector where the i-th row is the vector without the i-th element, without a for loop, Matlab - removing rows and columns from a matrix that contain 0's, Compare two unequal column matrix in matlab without using for loop, Choose multiple values from multiple rows and columns from matrix in matlab, create a matrix without using loop or nested loop operations in MATLAB, Deleting rows from a Matlab cell matrix which match a given pattern, Extracting last (non NaN) 200 columns from matrix with varying number of NaNs ending the rows, apply matrix randomisation without for loop in matlab, Process a matrix in matlab without for loop, MATLAB Remove Only Certain Zeros from Matrix, Selecting entries from a matrix without using a loop, Calculating the histogram of a matrix without using a for loop in matlab. So it means rows 1 through the end-2 and all columns of those rows. More Answers (6) Peter on 30 Nov 2012 31 Link Translate "I have a Matrix of 400 rows and 40 columns.I want to completely remove rows 3 and 9 to get a matrix with 398 rows. Basically, [] denotes an empty array. In that, there is a "pushbutton" if the user wants to remove the rows. Andrew, could you transpose so that you are deleting columns instead of rows? informmation will be lost or get arranged in the matrix? Is there a more efficient way to remove fields and delete rows from a struct array? Are defenders behind an arrow slit attackable? MATLAB Commands - 7 Cell Array Functions cell Creates cell array. The Matlab expression B=all (A) is translated into Scilab by B=and (A): If A is a matrix, all (A) is equivalent to all (A,1) in Matlab whereas in Scilab and (A) is a logical AND of all elements of A. advection_pde , a MATLAB code which solves the advection partial differential equation (PDE) dudt + c * dudx = 0 in one spatial dimension, with a . Is ther. rev2022.12.11.43106. because that is the easiest way to type in the rows. Kyle sexton. You may receive emails, depending on your. Unable to complete the action because of changes made to the page. No guarantees it'll be faster. typedef bool (*remove_predicate) (const mat &rc); void remove_if(const mat &mat, mat &res, remove_predicate pred, bool removerows=true) { res.release(); int n = For example, if the points are and , you. Filter elements from a 3D matrix without loop, Remove for loop from clustering algorithm in MATLAB, Replace specific matrix position with array value without using for loop in MATLAB, MATLAB - work directly with indices of a matrix without using a loop, How would you remove the loop from this matlab code, MATLAB remove NaN values from matrix and shift values left, Creating a matrix from a vector with a specific indexing without a loop. remove rows of matrix in matlab Choose multiple values from multiple rows and columns from matrix in matlab create a matrix without using loop or nested loop operations in MATLAB Deleting rows from a Matlab cell matrix which match a given pattern Extracting last (non NaN) 200 columns from matrix with varying number of NaNs ending the rows Is it possible to hide or delete the new Toolbar in 13.1? So putting everything together gives. x = numpy.delete (x, (0), axis=0) Add Own solution. // returns true, if the item should get removed. You can delete an entire row or column of a matrix by assigning an empty set of square braces [] to that row or column. your_matrix (end, :) = []; % deletes your matrix end (last) row your_matrix (:, end) = []; % deletes your matrix end (last) column Bhaskar R on 28 Jan 2020 Its a MATLAB syntax to remove elements from the matrix. Manage SettingsContinue with Recommended Cookies. Unable to complete the action because of changes made to the page. The column specifier is ":" which means "all". BTW, changing these rows to ones is just as easy: Thanks for contributing an answer to Stack Overflow! Therefor if you are keeping entire columns then the block of memory that needs to be copied to the new array is arranged sequentially in memory and can just be described as "starting address" and "number of items to copy". Then create a new matrix C using the new vector X and the rows you want from your original matrix A. new_matrix is generated out of A by taking only the rows you want. Did neanderthals need vitamin C from the diet? So we want: row_indices = find([1,1,1, A(4:end,3). your location, we recommend that you select: . For example, suppose I want to delete the last two rows of a matrix: tst= [1 1 1; 2 2 2; 3 3 3]; lastn=2; tic tst ( (end- (lastn-1)):end,:)= []; toc This works, but it seems quite expensive: "Elapsed time is 0.001152 seconds." function remove_button_Callback (hObject, eventdata, handles) % hObject handle to remove_button (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % By default the remove button will only remove the last row in the % table dat = get (handles.eptable,'Data'); So we want: row_indices = find([1,1,1, A(4:end,3). The typical goal here is just minimize the number of matrix resizing operations you have to do. We and our partners use cookies to Store and/or access information on a device.We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development.An example of data being processed may be a unique identifier stored in a cookie. For example, suppose I want to delete the last two rows of a matrix: tst= [1 1 1; 2 2 2; 3 3 3]; lastn=2; tic tst ( (end- (lastn-1)):end,:)= []; toc This works, but it seems quite expensive: "Elapsed time is 0.001152 seconds." The size of the output vector will be. It can be represented by one or more rows (i) AND one or more columns (j). How to implement A = sparse(I, J, K) (sparse matrix from triplet) in a Fortran mex file? '<600]), The first 3 ones are because you always want the first 3 lines. Row order is just your reference number (for vectors x. Matlab Arrayfun ..) which is click this siteof the fundamental things in MATLAB. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. It seems easy but I still keep on getting some weird outcomes. Any disadvantages of saddle valve for appliance water line? MathWorks is the leading developer of mathematical computing software for engineers and scientists. Extract drawline coordinates in App designer. The consent submitted will only be used for data processing originating from this website. Where row_indices is the vector of indices you want to keep. If you have a matrix A and want to delete the 3rd and 9th rows, you can use the command: Theme Copy A ( [3,9],:) = []; 5 Comments Show 4 older comments Arezoo Samiei on 7 Oct 2021 Thank you so much Jan! How to find all edge pixels around one region in binary image? Using Matlab; Using Matlab and Excel; Using Matrix in Matlab; Using Python and Matlab; Using Array in Matlab . Find the treasures in MATLAB Central and discover how the community can help you! Asking for help, clarification, or responding to other answers. sites are not optimized for visits from your location. . Result should look like that: and as @yoda said, to remove the rows do: Firstly your problem is that entering a matrix inside a matrix means use the values of the matrix as indices. Result should look like that: and as @yoda said, to remove the rows do: Firstly your problem is that entering a matrix inside a matrix means use the values of the matrix as indices. Share: 42,815 Hi, I am trying to delete the bottom n rows of an N X 2 array. It seems easy but I still keep on getting some weird outcomes. . If you do that then the portion that is left behind is contiguous in memory, and it should be faster to work with that than to have to copy over each partial column as you delete rows. Ready to optimize your JavaScript with Rust? Command to delete last row and column of a matrix - MATLAB Answers - MATLAB Central Productos Soluciones Educacin Soporte Comunidad Eventos Obtenga MATLAB MATLAB Answers Answers MATLAB Central Home Ask Answer Browse More Software de prueba Command to delete last row and column of a matrix Follow 271 views (last 30 days) Show older comments So it is faster to "make a new matrix" than to "resize an existing matrix," it seems. So putting everything together gives. What is the opencv equivalent to matlab's fliplr()? Matlab's 'cov' function will obtain the covariance of a matrix where the different columns are different components of random variables and the rows are different variations of those rows. A matrix is an ordered rectangular array arrangement of numbers. MatLab - Padding arrays with something that wont be valued? function remove_button_Callback (hObject, eventdata, handles) % hObject handle to remove_button (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % By default the remove button will only remove the last row in the % table dat = get (handles.eptable,'Data'); Removing Rows or Columns from a Matrix The easiest way to remove a row or column from a matrix is to set that row or column equal to a pair of empty square brackets []. Accelerating the pace of engineering and science. I have found that this can be done in the following way. Choose a web site to get translated content where available and see local events and MathWorks Support Team on 27 Nov 2018 5 Link To extract any row from a matrix, use the colon operator in the second index position of your matrix. I would like to be able to delete the last n rows of a matrix. O1=O1(1:100); but is it possible to do it in one line? Yes, I should be able to do that. P=[1,2;2,3;4,5], entering each point at a time. PSE Advent Calendar 2022 (Day 11): The other side of Christmas. So I have a 36078x2 table. CGAC2022 Day 10: Help Santa sort presents! If you have a matrix A and want to delete the 3rd and 9th rows, you can use the command: Theme A ( [3,9],:) = []; Thank you so much Jan! How can you remove matrix rows in Matlab based on some criteria? This nearly works but for the last set which is DataE20(14) I get a 4x2 array instead of the wanted 4x20. This is interesting. To answer your question, you need to replace the matrix with a smaller matrix. What is the solution of removing the last row? % --- Executes on button press in remove_button. Based on of the matrix a, as created in the last section, . since your matrix only has zeros and ones (as a result of the "<" operator) you got a weird result. Command to delete last row and column of a matrix - MATLAB Answers - MATLAB Central Command to delete last row and column of a matrix Follow 287 views (last 30 days) Show older comments Swati Sarangi on 28 Jan 2020 0 Commented: Bhaskar R on 28 Jan 2020 Accepted Answer: Alex Mcaulley Hi, We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. Find the treasures in MATLAB Central and discover how the community can help you! So it means rows 1 through the end-2 and all columns of those rows. Based on In general, I need to remove rows that contain a specific elements in a specific column, without using a loop. MATLAB: Remove n last rows from matrix without loop. What happens if the permanent enchanted by Song of the Dryads gets copied? I am trying to make a cell array which splits the data into sets of 20 days. Learn more about guide, array Accelerating the pace of engineering and science. Why am I getting this error when selecting files with uigetfile? offers. Now you need to specify the columns since M is a 2-D matrix with both rows and columns. How to remove the last row in a matrix?. #include "opencv2/opencv.hpp" using namespace cv; #include using namespace std; // function to decide, which elements should be removed. Log in, to leave a comment. We did this mainly. MathWorks est le leader mondial des logiciels de calcul mathmatique pour les ingnieurs et les scientifiques. For simple example, let's have a 10x10 matrix A: A=[1:10; 901:910; 201:210; 301:310; 701:710; 401:410; 601:610; 501:510; 801:810; 101:110]; And I want to remove (for better illustration just replace with ones) that rows from fourth to the last, whose third columns contain value higher than 600. something like: https://fr.mathworks.com/matlabcentral/answers/115952-how-to-remove-the-last-row-in-a-matrix, https://fr.mathworks.com/matlabcentral/answers/115952-how-to-remove-the-last-row-in-a-matrix#answer_124182, https://fr.mathworks.com/matlabcentral/answers/115952-how-to-remove-the-last-row-in-a-matrix#comment_196074, https://fr.mathworks.com/matlabcentral/answers/115952-how-to-remove-the-last-row-in-a-matrix#comment_196076, https://fr.mathworks.com/matlabcentral/answers/115952-how-to-remove-the-last-row-in-a-matrix#comment_196090, https://fr.mathworks.com/matlabcentral/answers/115952-how-to-remove-the-last-row-in-a-matrix#comment_196100, https://fr.mathworks.com/matlabcentral/answers/115952-how-to-remove-the-last-row-in-a-matrix#comment_196271. How can I apply a function to every row/column of a matrix in MATLAB? A matrix having m rows and n columns is called a matrix of order m n or simply m n matrix. Using GUIDE, I have made a table. https://www.mathworks.com/matlabcentral/answers/66663-how-to-delete-the-last-n-elements-of-an-array, https://www.mathworks.com/matlabcentral/answers/66663-how-to-delete-the-last-n-elements-of-an-array#answer_78136, https://www.mathworks.com/matlabcentral/answers/66663-how-to-delete-the-last-n-elements-of-an-array#comment_478254, https://www.mathworks.com/matlabcentral/answers/66663-how-to-delete-the-last-n-elements-of-an-array#comment_478265, https://www.mathworks.com/matlabcentral/answers/66663-how-to-delete-the-last-n-elements-of-an-array#comment_828165. In the United States, must state courts follow rulings by federal courts of appeals? Not the answer you're looking for? axis square makes the current axes region square (or cubed when three-dimensional) Much space between y-axis and ylabel 2 Responses to move x-axis label to top of figure in matplotlib What I added was to move the Axis label linspace(0, 10, 30) y = np The last line makes the y-axis have integer-only labels The last line makes the y-axis have. Based on How does legislative oversight work in Switzerland when there is technically no "opposition" in parliament? To learn more, see our tips on writing great answers. I will be able to use in the future what you have taught me. If you want to keep the old matrix. Would you please help? Using GUIDE, I have made a table. Extract data from MATLAB matrix without for-loop, MATLAB: Subtracting matrix subsets by specific rows, matlab remove for loop in matrix computation, MATLAB: find means of other rows in a matrix without loop. Choose a web site to get translated content where available and see local events and I want to make sure that atleast 1 row remains. . what is the matlab way without loop to multiply a matrix with a vector (extending to the 3rd dim)? B = unique (A,'rows') That will delete repeated rows in matrix A, hence the parameter 'rows'. A = new_matrix. Choose a web site to get translated content where available and see local events and I want to take the the first value in the first row, first column and compare it with all the other values in the second column. A: No way: Matlab and Mathematica has a new feature called row index inside of an array in Python that is called RowOrderOf(x array, is that right? Accelerating the pace of engineering and science. How to export enumerated list values from DOORS into cells or fields of MATLAB data; MATLAB: Removing 4 lines of header repeated every 14 lines & keeping 2nd/3rd columns of data in txt file your location, we recommend that you select: . Making statements based on opinion; back them up with references or personal experience. I don't know how to do it. '<600]), The first 3 ones are because you always want the first 3 lines. Regarding your second question, I don't think there's a function for that exactly but you can simply average both rows and store them in a new vector X. Conditional statement in matlab function argument, MATLAB: evaluation of a piecewise polynomial (pchip) with ppval, how to find the first element that has been seen twice in a vector, When to use "to workspace" block vs "outport" block, How to add a matrix( not the same dimension) below another matrix, imread() permission error after processing same images, To apply window function on Wigner-Ville Distribution in Matlab. For example if one row contains the value "3, 4, 2, 1" then I would need . Is it acceptable to post an exam question from memory online? Best coding solution for query Matlab: Remove rows when first and last 2 elements are shuffled. 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