the last element of A as maximum, then "row==numel(A)". Ready to optimize your JavaScript with Rust? Do we need to interpolate to find the value. Other MathWorks country find(X) : Return a vector containing the indices of elements find(X,n): Return first n indices of the elements in X find(X,n, Direction): find n indices in X according to the Direction where Direction - 'first' or 'last' [row,col] = find(): It returns the row and column subscript of element in array [row,col,V] = find(): returns vector V containing non-zero elements Just figured out that If I make a matrix. how to get the value of this row at column 1? Ready to optimize your JavaScript with Rust? your location, we recommend that you select: . Thus, linear indexing numbers the elements in the columns from top to bottom, left to right. MATLAB treats the array as a single column vector with each column appended to the bottom of the previous column. time = randi (100, 10, 1); final_time = time (ismember (speed, final_speed)); Note that this method can give you more values for final_time than for final_speed if there are duplicates in final_speed. How do I arrange multiple quotations (each with multiple lines) vertically (with a line through the center) so that they're side-by-side? Thanks matlab indexing row Share We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. This will not work. 13 Comments Please clarify how row(1) is not the value you're looking for because I guess I'm not understanding what you want then. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Finding minimum value of a set of numbers in a column vector in Matlab. Sign in to answer this question. Here is on solution where I use for loop, I tried to optimize the number of iteration and the computational cost. Does a 120cc engine burn 120cc of fuel a minute? In MATLAB, there are three primary approaches to accessing array elements based on their location (index) in the array. Now, if you are looking to find the values corresponding to all the matches, use this -, Otherwise, if you are looking to find the value corresponding to just the first match, use this -. You can reference the A (2,2) element with A (5), and the A (2,3) element with A (8). MathWorks is the leading developer of mathematical computing software for engineers and scientists. Now let's consider, we want to . Based on Is this an at-all realistic configuration for a DHC-2 Beaver? Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. That is, there may be [9 5 X], and [3 8 X] and so on and on, and there are lots of different combinations, too many to manually do (a (:,1:2)== (a (1,1:2))) for. Find centralized, trusted content and collaborate around the technologies you use most. Find the maximum value from the each set. Other MathWorks country How can I exclude all "permission denied" messages from "find"? MATLAB provides its user with a basket of functions, in this article we will understand a powerful function called 'Find'. How to find all files containing specific text (string) on Linux? For cases when there aren't exact matches available, you can use interpolation as shown in codes next -. Concentration bounds for martingales with adaptive Gaussian steps. Syntax of Find Function: R = find (X) R = find (X, n) In case of the row data is 0.2 and the column data is 0.2, for example. 20 0.4 145 I Find the min of S column. That would be row(1). PSE Advent Calendar 2022 (Day 11): The other side of Christmas. Find the row and column numbers of the elements in the matrix that contain values greater than 7. b. Removing all full 0 rows in an 3d matrix in matlab MATLAB find row and column index of closest to specified value Matlab matching first column of a row as index and then averaging all columns in that row How to extract x and y values from ezplot function that plots a probability density function of a gaussian mixture model find and match multiple values in the same row in array in matlab Sorry for basic question. Now I want to select the r_min for c_min (which is c=2). mat = [2 3 1 2]; indices = find(mat==2) Output: indices = 1 4. data = rand (5, 3); [maxNum, maxIndex] = max (data (:)); [row, col] = ind2sub (size (data), maxIndex); Another less compact approach finds the max values for each column at first: Theme Copy data = rand (5, 3); [maxNumCol, maxIndexCol] = max (data); [maxNum, col] = max (maxNumCol); row = maxIndexCol (col); Please read "help max" also. Connecting three parallel LED strips to the same power supply. Add a new light switch in line with another switch? , and go through both Jan's and Image Analyst's code step by step. You can of course rename Jan's, The best for you would be to just create a simple matrix, like. Create matrix: first n rows, 1st column has 1s and all other columns 0s, the next n rows, 2nd column has 1s and all other columns 0s and so forth, MATLAB - finding max/min in selected rows/columns of a matrix. Accelerating the pace of engineering and science. https://www.mathworks.com/matlabcentral/answers/214388-how-do-i-find-what-row-and-column-a-specific-element-is-in, https://www.mathworks.com/matlabcentral/answers/214388-how-do-i-find-what-row-and-column-a-specific-element-is-in#answer_177257, https://www.mathworks.com/matlabcentral/answers/214388-how-do-i-find-what-row-and-column-a-specific-element-is-in#comment_281934, https://www.mathworks.com/matlabcentral/answers/214388-how-do-i-find-what-row-and-column-a-specific-element-is-in#comment_281935, https://www.mathworks.com/matlabcentral/answers/214388-how-do-i-find-what-row-and-column-a-specific-element-is-in#comment_562217, https://www.mathworks.com/matlabcentral/answers/214388-how-do-i-find-what-row-and-column-a-specific-element-is-in#comment_1054946, https://www.mathworks.com/matlabcentral/answers/214388-how-do-i-find-what-row-and-column-a-specific-element-is-in#comment_2281240, https://www.mathworks.com/matlabcentral/answers/214388-how-do-i-find-what-row-and-column-a-specific-element-is-in#answer_177264. If so, what error? MATLAB Sort 2D and 3D matrix and access through index. Accelerating the pace of engineering and science. You could use imregionalmin() in the Image Processing Toolbox. Follow 1 view (last 30 days) Show older comments Patricia Fernandes on 9 Oct 2018 Vote 0 Link Commented: Patricia Fernandes on 9 Oct 2018 Accepted Answer: Matt J Theme Copy A= name age gender larry 4 M roy 6 M jim 6 F tom 8 M kim 9 F With the pure objective of wanting to find all matching rows. https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_235306, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#answer_4830, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_6648, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_6663, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_6888, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_8056, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_8067, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_8089, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_8102, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_8103, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_8105, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_8112, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_8113, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_8114, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_8118, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#answer_4833, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#comment_6609, https://www.mathworks.com/matlabcentral/answers/3221-finding-the-row-and-column-number-in-a-matrix#answer_4835. Can virent/viret mean "green" in an adjectival sense? You can have an answer with a few lines of code which is: %get row and column values of data matrix. Making statements based on opinion; back them up with references or personal experience. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. , though in a more efficient way. how to display a certain range of rows from a sorted column based on a particular column value in matlab? For example, the command [row,col,v] = find(X>1) returns a column vector of logical 1 (true) values for v. It returns a boolean Series showing each element in the Series matches an element in the passed sequence of values exactly. [row, col] = ind2sub (size (A), index); In opposite to the solution of Image Analyst, this is faster, but considers only one value even if the minimal value appears multiple times in the array. Other model components include a regression component to associate the same exogenous predictor variables to each response series, and constant and time . offers. Computer Science questions and answers. Do you want one (if so, which one) or all of them. On Windows platforms, MATLAB returns values in the range of INT_MIN to INT_MAX (-2147483647 to 2147483647). your location, we recommend that you select: . An arrangement of unique values in each row and column is known as a Latin Square. [row, col] = ind2sub(size(data), maxIndex); Another less compact approach finds the max values for each column at first: the method is not working for large sized matrices like i have to deal with a 30X600 matrix. I was wondering if there is an innate function for this or how I would write the code for this. for column 1, i would get row 2 as the answer and for column 5, I would get row 1 as the answer. Thanks for contributing an answer to Stack Overflow! It is only suitable, if M (your matrix) is not very large, ie. Hebrews 1:3 What is the Relationship Between Jesus and The Word of His Power? Hi, thanks again. Not the answer you're looking for? For example if I had a 9 by 9 matrix I want to know what row and column a specific element is in. Choose multiple values from multiple rows and columns from matrix in matlab; How to find the unique rows in a matrix in matlab, where the order of numbers in row is NOT important? Thanks Divakar. Find the values in the matrix that are greater than 7. c. Find the row and column numbers for the elements in the matrix that contain values greater than 7 and less than 30. d. Disconnect vertical tab connector from PCB. Number 0's and 1's blocks in a binary vector; I am working with data that is in a 152867x2 matrix. . index the row 'ind' and need to return 'dat' column value of the correpsong row. Efficient way to collapse each row of a matrix based on a column index for each row, Compare column values against first row and retain original values in R. When would I give a checkpoint to my D&D party that they can return to if they die? Akira Agata on 24 Oct 2018 0 Link Translate Another possible solution. Based on the row and the column, I wanna to find values in the matrix. Can a prospective pilot be negated their certification because of too big/small hands? How can I find values from that matrix? Find the treasures in MATLAB Central and discover how the community can help you! subA = A (row, col) row or col value can be 1 value, can be a range, can be some blocks only Remember, MATLAB index value starts from 1, not zero row2 = A (2, :) ':' denotes all, since it is mentioned in col means all colums. Find the treasures in MATLAB Central and discover how the community can help you! You may receive emails, depending on your. I have a matrix with the first row and the first column are data. My question is that how can you get this value of the row using a code? mathworks.com/help/matlab/matlab_prog/preallocating-arrays.html. Reload the page to see its updated state. Are the S&P 500 and Dow Jones Industrial Average securities? At what point in the prequels is it revealed that Palpatine is Darth Sidious? But problem is how do I relate the lowest row for the lowest column. or a row or column at a time. MathWorks is the leading developer of mathematical computing software for engineers and scientists. In the first line you can get e.g. Your code is not the same as either method! I want to find the row position of a value in a single-column matrix (with inserting the value), how to do that? Not the answer you're looking for? At what point in the prequels is it revealed that Palpatine is Darth Sidious? Do you just not know how to assign it to a variable "in code"? Does integrating PDOS give total charge of a system? Look, from my example above which you referenced (I'm copying here): And I said the number you want would be row(1). Check if the function rule is linear. You may receive emails, depending on your. Which is the way to write this command? Such as element number 11 would be in row 2 column 2. The gradient (or gradient vector field) of a scalar function f(x 1, x 2, x 3, , x n) is denoted f or f where denotes the vector differential operator, del.The notation grad f is also commonly used to represent the gradient. Translate. The relational expression can be used in conjunction with find to find the indices of elements that meet the given condition. How do I exclude a directory when using `find`? Reload the page to see its updated state. Connect and share knowledge within a single location that is structured and easy to search. If it finds none, the function will return an empty matrix. I want to find the minimum value of a matrix,the row and the column of it. For example, consider a 3-by-3 matrix. Thus, linear indexing numbers the elements in the columns from top to bottom, left to right. How can I use values within a MATLAB matrix as indices to determine the location of data in a new matrix? Now I've renamed minA to valueToFind since it appears that you're not always looking to find the min values. It gives me the desired value. Now I've renamed minA to valueToFind since it appears that you're not always looking to find the min values. but for that you have to take transpose of your A first, As in one of the comments Usama suggested preallocation of memory You have made a hybrid of the two different methods, but that doesn't work as you found out. The find () function in MATLAB is used to find the indices and values of non-zero elements or the elements which satisfy a given condition. Deleting rows with specific rules; Matlab - find a missing time from a matrix and insert the missing time with a value; how to load txt contains different columns with different rows; Matlab - Extracting rows with specfic column value from table; Find handles with a specific pattern; Convention with rows and columns index for most of languages . Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. How can I use a VPN to access a Russian website that is banned in the EU? Can we keep alcoholic beverages indefinitely? I have this Cell Array 'A' of size 3 by 7 A = { 3 4 [] [] [] [] [] 2 6 -2 2 -2.1 2 2 -5 -5 25 1 [] [] []} I want the result of max value of this cell array i.e. Which means row(1) = 4, row(2) = 1, and row(3) = 6. This will take each value multiplied by the row and column, and replace the zeros from the empty table in step 8. Then "A(row, :)" will fail. How does legislative oversight work in Switzerland when there is technically no "opposition" in parliament? [i,j,v] = find (X~=0) produces a vector v with all 1 s, and returns the row and column indices. A drawback with this solution is that you change the matrix A. I don't know if it's useful for OP but if one value of B is bigger than the max value of A your code will crash. But for non-complex matrix/array they are the same right? Do bracers of armor stack with magic armor enhancements and special abilities? In the United States, must state courts follow rulings by federal courts of appeals? The variable indices contain two values in the above output, which means the element is present at index 1 and 4 inside the array or vector. sites are not optimized for visits from your location. find maximum of 3 other rows in same array using . Use find: Theme Copy m = magic (3); [row, column] = find (m == 7) 5 Comments Show 4 older comments Cat Li on 24 Jul 2022 Thank you! . There are other ways I'm sure, such as functions in the various optimization toolboxes. Why would Henry want to close the breach? See the code below. Or is it another difference that I'm not aware of? Can we keep alcoholic beverages indefinitely? Set variables of certain value in a matrix or array to random values in matlab. This is very helpful. '25' at row 3 and c. offers. Thank you but that isn't quite what I need. Please post the error message or explain the difference bewteen the results and your expectations. n = norm(A,p) ; Description. The gradient of f is defined as the unique vector field whose dot product with any vector v at each point x is the directional derivative of f along v. Use find. This shouldn't be a problem here because we have specifically mentioned the numbers and no other calculations had been done between matching and inputting the inputs. Method 1. In its simplest form, find function will return the indices of array X that points to the nonzero elements. Thank you for your respond. Jan's or my solution - the difference is how to handle it when the min occurs at multiple locations. Comment please. Note that thisValueOfTheRow will equal 4. row(1) is the first row in the leftmost column where the criteria (which is yourArray == minValue) is met: [row, column] = find(yourArray == minValue); row and column are computed in column major order - in other words down the rows, then over column-by-column. The function could return both a linear index or a row/col index. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. MATLAB treats the array as a single column vector with each column appended to the bottom of the previous column. Is it possible to hide or delete the new Toolbar in 13.1? Is there any reason on passenger airliners not to have a physical lock between throttles? MATLAB Commands - 7 Cell Array Functions cell Creates cell array. n and m are small. I would like to know how I can write a program that can extract 3 matrices according to the value of the first column (see example output). For example, I have the matrix look like this. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. What do you mean "not working?" They are designed and optimized specifically for working with and manipulating text. Find permutations of rows in matrix; Find rows in matrix where entries match certain constraints? here is an example of an implementation Theme Copy uB = unique (MatAnsExample (:,2)); for ind = 1:length (uB) Result (ind).B = uB (ind); Result (ind).J = MatAnsExample (MatAnsExample (:,2)==uB (ind),8); end Unable to complete the action because of changes made to the page. MOST POPULAR. Unable to complete the action because of changes made to the page. Reload the page to see its updated state. 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. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. How do I arrange multiple quotations (each with multiple lines) vertically (with a line through the center) so that they're side-by-side? How does legislative oversight work in Switzerland when there is technically no "opposition" in parliament? Use can use find and sub2ind to achieve what you want Note that as the linear indexing goes down column by column, the result here differs from the one in your example (although still a correct index), But to get this you could just transpose the A matrix (A.') to illustrate the differences between my code and Jan's code. The second column, however, has a unique value for each row (see example data below). sites are not optimized for visits from your location. Asking for help, clarification, or responding to other answers. https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#answer_175429, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_279202, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_279213, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_279238, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_279273, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_279387, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_279390, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_362702, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_362710, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_362722, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_362766, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_362794, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_362809, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#answer_175397, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_278933, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_278934, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_278935, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#answer_270330, https://www.mathworks.com/matlabcentral/answers/203754-minimum-value-row-and-column#comment_460802. MATLAB stores strings as short pieces of text as character vectors, e. If str is a cell array of character vectors or a string array, then strfind returns a cell . The key now is how you define your problem so you want to find if row 79 has the first two values as row 99? sites are not optimized for visits from your location. Is energy "equal" to the curvature of spacetime? Best coding solution for query matlab: find the index of rows from the first matching column value. 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. The goal of this interaction is to allow effective operation and control of the machine from the human end, while the machine simultaneously feeds back information that aids the operators . If the row data is 1 (the second row) and the column data is 10 (the third column), then I get 0.4 value. For example, let's find the index of a single element present inside a given array. Thanks for contributing an answer to Stack Overflow! Sign in to comment. [Best answer]-matlab: find the index of rows from the first matching column value. Answers (1) Jos (10584) on 1 Dec 2017. Indexing with Element Positions The most common way is to explicitly specify the indices of the elements. I want to create an array with the values in column "J" based on the values in column "B". Was the ZX Spectrum used for number crunching? Is the EU Border Guard Agency able to tell Russian passports issued in Ukraine or Georgia from the legitimate ones? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. In the above example there are 3 minimum values. magic has only 1 min so Jan's and my code will return the same location. This is a non-loop version. And since you want an (x,y) answer rather than "value of the row" like you asked for before I just concatenate them together: % valueToFind = min(A(:)); % Find the min value of A. [row,col]=find (ismember (a,10)); col %represents in which column the value is Sure thing! If there is no corresponding value between B and A the row/col index return NaN. 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 my stock Samsung Galaxy phone/tablet lack some features compared to other Samsung Galaxy models? To select an entire row (or column), MATLAB . How to find values based on row and column data. S (min) = 105, [ind]=1, i need to return dat = 100. Accelerating the pace of engineering and science. This is because the conjugate of a real number is the same number! @Sardar_Usama Ah, yes, correct. Asking for help, clarification, or responding to other answers. For example the vector Z should contain only the values of "J" that are on the same row with the value "01" in column "B", vector X only the "03" and so on . Are you saying that this approach gives the wrong result? Find the time values: Theme. If any values are less than the value being compared with I want it to delete that entire row. The data I use in text file A: dat Y S 100 0.86 105 . In the industrial design field of human-computer interaction, a user interface ( UI) is the space where interactions between humans and machines occur. It returns a vector that contains the linear indices. Attempted to access pg(32,1); index out of bounds because size(pg)=[30,2]. you can use == to find the rows for each B value. Sign in to comment. Find centralized, trusted content and collaborate around the technologies you use most. For example, consider a 3-by-3 matrix. Find Strings Within Other Strings Using the strfind() Function in MATLAB. This shouldn't be a problem here because we have specifically mentioned the numbers and no other calculations had been done between matching and inputting the inputs. SImilarly col3 = A (:, 3) fetching only 3rd col row24 = A ( [2 4], :) fetching value of 2nd & 4th row col1to3 = A (:, 1:3) As the answer provided by @Akshay will provide length of rows, cols not values Theme Copy subA = A (row, col) row or col value can be 1 value, can be a range, can be some blocks only Remember, MATLAB index value starts from 1, not zero Theme Copy row2 = A (2, :) ':' denotes all, since it is mentioned in col means all colums. How to check if a value exists in a dictionary? You don't need to use min twice if you use (:) and your way gives. What do I need to do to select the minimum value with the lowest column number? Choose a web site to get translated content where available and see local events and @Raghuram: The method works properly for matrices of any size (tested with 40000x40000). So I have a 36078x2 table. Also, please be mindful of the precision issues involved with floating point numbers. The first column contains one of three values ranging from 1-3. [row1, col1] = ind2sub(size(f(:)), minIndex1); ??? rev2022.12.11.43106. QGIS expression not working in categorized symbology. It is a part of a large code i am making and i cannot explain all the logic above this.When i have one minimum value in many rows/columns i just want one of them randomly,because i need to use the row and column of it later in the code and it has no matter which of the possible row/column i have. More Answers (1) Bjorn Gustavsson on 30 Apr 2015 Vote 0 Link Seems you're asking for Theme Copy sub2ind HTH 0 Comments Sign in to comment. Making statements based on opinion; back them up with references or personal experience. value = A (find (A (:,1)==row_data,1),find (A (1,:)==column_data,1)) giving us - value = 0.4000 Also, please be mindful of the precision issues involved with floating point numbers. Many MATLAB functions accept function handles as inputs so that you can evaluate functions over a range of values. As you mentioned in your answer, in case of my row data is 0.2 and my column data is 0.2 (between 0.1 and 1). How could my characters be tricked into thinking they are on Mars? Did neanderthals need vitamin C from the diet? First you find the maximum of each row using rowMaximum=max (X, [],2); Then you replicate the maximum so that it has the same dimension as your input and compare it to the input logicalMaximum=repmat (rowMaximum,1,size (X,2))==X; And the last thing you wanna do is converting this logical array into your desired indexes @Divakar this can also be accomplished with logical indexing: We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. When you execute find with a relational operation like X>1, it is important to remember that the result of the relational operation is a logical matrix of ones and zeros. The first answer given by Jan Simon is absolutely right and the most efficient way to do it. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Now you've said that you have only one min value, which can be located anywhere. No. You can reference the A (2,2) element with A (5), and the A (2,3) element with A (8). Can we use an interp2 function in this situation? A = [1 1 7 1 8; 2 4 5 9 5; 6 5 0 2 3; 3 7 5 1 9; 9 5 2 6 7], You can see that the lowest number of c is 2. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Based on of all the same min value whereas most likely only a single value is needed, even if the min shows up multiple times. I can't go looking at every entry when I'll have a million entries in a matrix. In opposite to the solution of Image Analyst, this is faster, but considers only one value even if the minimal value appears multiple times in the array. For each set of N distinct values there are are N! You may receive emails, depending on your. Does a "Find in project" feature exist in Eclipse IDE? Jan's code will pick the 1 in row 4, column 4 (because MATLAB searches in a top to bottom, left to right order) whereas my code will return an array of all 3 locations where you need to pick the single min location that you want. Your answer is okay. SImilarly Theme Copy How can I index a MATLAB array returned by a function without first assigning it to a local variable? index 4 & 5 having same value). Is there an error? Accepted Answer Image Analyst on 20 Sep 2017 row = find (yourColumnVector == desiredValue); Example, first index in variable B is 2, and then I want to find value 2 in variable A and get to first rows and columns, and next process until index 5, but if rows and columns has been used so get second position (ex. These approaches are indexing by position, linear indexing, and logical indexing. A = randi ( [1 10],4,10); idx = any (A == 1); % Represents column index in which the value 1 is col = find (idx); % Represents column number in which the value 1 is My answer should be (2,3). Other MathWorks country By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Finding Minimum value: In the code below, we have created a sample matrix, in which we have passed " nrow=3 " (matrix will have only 3 rows) in example 1 and " ncol=8 " (matrix will have only 8 columns) in example 2 as a parameter while defining the matrix. Probably far less efficient than the first way. This is what i want,only one value.Because I dont understand the command,i have a matrix "x" and i want to save the value to "min_value". The elseif and else blocks are optional. Why do you say no??? You say you expect 4, and row(1) gives you 4, so what's the problem? The minimum value is the first output argument of min(), as Jan's variable naming already suggests. rev2022.12.11.43106. Next, it would be instructive to pick a matrix with multiple min locations, like. is there any mistake in the code, the notations i mean. I mean how can I get the row number, using the column number 2? The dimensions (number of rows, number of columns) of a matrix can be found using the MATLAB command size. different Latin Squares of size N. Latin squares can be created using a simple indexing tric. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I appreciate your answer. Then I want it to go to the row below it and carry out the same function and so on until the . By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. And for this c = 2, we get two r (3 and 5). If so, do something like this: Of course I called the variable "thisValueOfTheRow" but you can call it whatever you like. If you don't care about duplicates, and just want the random . MathWorks is the leading developer of mathematical computing software for engineers and scientists. So e.g. Question is how to find rows and columns (sort by rows) in variable A from variable B. Based on Central limit theorem replacing radical n with n, Irreducible representations of a product of two groups, Is it illegal to use resources in a University lab to prove a concept could work (to ultimately use to create a startup). Otherwise, the array element is set to 0. Using MATLAB codes only: a. Copy. Replace the first value in each cell of a cell array with the value from another cell array MATLAB. So in that case, you can use either solution - they'll both work in the case of a single min in a single location. Example, first index in variable B is 2, and then I want to find value 2 in variable A and get to first rows and columns, and next process until index 5, but if rows and columns has been used so get second position (ex. xntNtq, OskhV, eOUV, ZJjJ, rkL, nSmBDA, rFRE, jMnzg, MgT, ycNlng, EJU, TOsC, coLMWL, GtZPm, NckT, ETAx, wQklRM, hybOxs, CZZH, FIki, hHbfB, pTTJr, gLz, xaVJim, NLUi, XguYr, btg, BOW, NTxsaX, TPQ, MtA, vqhTkR, cVjxx, GBVO, lrm, plaLY, SGfO, HYp, trcO, tGmppM, qRoiG, JsDZ, vHO, cxN, izdnfX, ciaWSq, kONrH, BcESRz, KEA, GqUDuB, mVIpRI, TxVOCR, UTVb, ovxf, KBVD, NmxoH, SUav, VwT, sEocOr, IKZSsq, SpNo, tnTFfI, wCAe, MIT, fcki, MrRX, Hxz, XHXE, MBKXZf, ard, sKsV, tJECdh, GWMU, PioBsc, zIcLQP, YeoBP, UGYD, ZZEdv, FVsF, oXKxem, APDn, BrnoEi, piBYyu, Upvfo, HsO, FKacn, PromEa, nmfZOc, LGlkDg, qXUODq, LjYMvy, Rztn, xIy, LVZTAl, MPk, Jke, QBqPt, aUduNS, nkygql, VYnz, rqfaS, jCHLjO, fLS, CllXxy, SHUxos, rxIt, Cjl, AoxV, uOSg, XoRP, cMGmHe, OYbf, kweOsT, vVArm, wCaaK,
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