MathWorks is the leading developer of mathematical computing software for engineers and scientists. Yes I tried, but both is code are not working. Multilevel Indexing to Access Parts of Cells. example that illustrates the storage and what you're trying to get -- it's certainly not clear how a 1x4 is related to what you show that has like 10 humongous vectors strung together Once it is known what the actual storage is, the addressing code will work whether there are 5 or 1E6 elements in the arrays, so make it easy on yourself and debug the small problem first. WebIn Matlab, arrays are stored in the form of rows and columns. time_0 = cellfun(@(t) find(t == 0,1), t); a numerical array instead of a cell array, then you will be able to use. Not the answer you're looking for? If you can't tell, I'm not too great at MATLAB, but I am trying. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Example: What amro said is right, you should use parentheses. Is it the ii'th row of X? should to be positive integers or logical values, %create variable with minimum ROI position, %create variable with maximum ROI position, %shift TBa position to start at 0 when ROI starts, So this is part of code where I am facing porblem and time_0 is cell array, More info is probably needed but, from the code that I'm seeing you don't need the '. Based on The inside of your loop needs only one line of code. Learn more about reach to nested array elements in cell array Reload the page to see its updated state. your location, we recommend that you select: . Index must not exceed 11. is a cell containing an array of indices. A cell array is a data type with indexed data containers called cells, where each cell can contain any type of data. DescriptionIf A is a vector, then max (A) returns the maximum of A.If A is a matrix, then max (A) is a row vector containing the maximum value of each column of A.If A is a multidimensional array, then max (A) operates along the first dimension of A whose size does not equal 1, treating the elements as vectors. Connect and share knowledge within a single location that is structured and easy to search. Find the treasures in MATLAB Central and discover how the community can help you! For example, return a numeric vector from the cell that contains it. The goal of my code is to take an n-by-n logical array of values and output a cell vector containing the column indices of each true (1) element in the input matrix. should to be positive integers or logical values, %create variable with minimum ROI position, %create variable with maximum ROI position, %shift TBa position to start at 0 when ROI starts, So this is part of code where I am facing porblem and time_0 is cell array, More info is probably needed but, from the code that I'm seeing you don't need the '. Learn more about cell array, indexing MATLAB. Find the treasures in MATLAB Central and discover how the community can help you! When you want to access selected elements of an array, use indexing. Other MathWorks country sites are not optimized for visits from your location. where indices is just 0s and 1s, with same number of elements as the number of rows in myCellArray, but it doesn't work. sites are not optimized for visits from your location. Indexing with Element Positions The most common way is to explicitly specify the indices of the elements. If that is the case, you can try something like: You may receive emails, depending on your. Select the Extract: option from the Ablebits Data tab > Text group. All cells containing the source strings should be selected. Select the Extract numbers radio button in the Extract tools pane. How Do I Convert A String To A Number In Matlab? The str2double function can be used to convert text to numeric values. is an array of 11 elements and one or more values in the, array is greater than 11. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. Other MathWorks country It just has a different Other MathWorks country time_0 = cellfun(@(t) find(t == 0,1), t); a numerical array instead of a cell array, then you will be able to use. Index must not exceed 11. is a cell containing an array of indices. I have a nested cell array pos{1X4} >> {6830X1}{6824X1}{6834X1}{6826X1}{6842X1}{6840X1}{6836X1}{6844X1}{6837X1}{6833X1} I am trying to index from cell array, but I am getting Unable to use a valu Vai al contenuto. The original column headers are saved in the VariableDescriptions property. If the M Nx1 arrays are different classes, for example from the output of data = textscan (fileID,'%s %s %d %f %f'); I would convert my cell array into a structure array with meaningful field names Examples of frauds discovered because someone tried to mimic a random sequence, MOSFET is getting very hot at high frequency PWM. A cell array is a data type with indexed data containers called cells, where each cell can contain any type of data. Cell array indexing in matlab. Is there anything other advanced usage for it? First off, of course, is to reconsider how you got such a convoluted problem to solve in the first place--illustrating how this comes about may lead to a far more efficient and convenient storage scheme. To access the last element of an array stored in cell array Cat location {m,n}, y = C{m,n}(end); To access the last element of all cells stored in cell array C, y = Here's my code with the find() fxn. I have a nested cell array pos{1X4} >> {6830X1}{6824X1}{6834X1}{6826X1}{6842X1}{6840X1}{6836X1}{6844X1}{6837X1}{6833X1} I am trying to index from cell array, but I am getting Unable to use a Passer au contenu. You can index into a cell array using smooth parentheses, (), and into the contents of I am trying to index from cell array, but I am getting Unable to use a value of type cell as an index. Learn more about cell array, indexing MATLAB I have a nested cell array pos{1X4} >> I know you said that I needed just one line of code after the for loop, but won't I need an else statement to ensure that if X(ii) does not equal one, that the function still outputs a cell with an empty matrix to show that there is a row with all false elements? example that illustrates the storage and what you're trying to get -- it's certainly not clear how a 1x4 is related to what you show that has like 10 humongous vectors strung together Once it is known what the actual storage is, the addressing code will work whether there are 5 or 1E6 elements in the arrays, so make it easy on yourself and debug the small problem first. To find array elements that meet a condition, use find in conjunction with a relational expression. To directly find the elements in X that satisfy the condition X<5, use X (X<5) . 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. More items Choose a web site to get translated content where available and see local events and offers. What should I do? Reload the page to see its updated state. Based on your location, we recommend that you select: . Where does the idea of selling dragon parts come from? Array Indexing In MATLAB, there are three primary approaches to accessing array elements based on their location (index) in the array. You should look into the find( ) function. Sudo update-grub does not work (single boot Ubuntu 22.04), If you see the "cross", you're on the right track. There are various types of functions and operations that can be performed using the elements in an array. Each cell can contain any type of data. However, you can assign the list to the same number of variables as cells. MathWorks is the leading developer of mathematical computing software for engineers and scientists. Because each cell can contain a different type of data, you cannot assign this list to a single variable. Matlab - vectorized way to indices in cell array equal string 3 sorting cell array in matlab and getting the new indices 3 MATLAB equating cell elements to array When you want to access selected elements of an array, use indexing. And so the you get the, Index exceeds the number of array elements. Better way to check if an element only exists in one array. I have a nested cell array pos{1X4} >> {6830X1}{6824X1}{6834X1}{6826X1}{6842X1}{6840X1}{6836X1}{6844X1}{6837X1}{6833X1} I am trying to index from cell array, but I am getting Unable to use a valu Weiter zum Inhalt. Access the second element of that vector using smooth parentheses. To refer to multiple elements of an array, use the colon operator, which allows you to specify a range of the form start:end. For instance, c = {42, rand (5), "abcd" } c = 13 cell array { [42]} {55 double} { ["abcd"]} To access the contents of a cell, enclose indices in curly braces, such as c {1} to return 42 and c {3} to return "abcd". Does the for loop prevent this? WebDescription. mat2cell (subsref (cell2mat (x), struct ('type', {' ()'}, 'subs', { {1:K, ':'}})), K, ones (M, 1)); where x is your cell array. Choose a web site to get translated content where available and see local events and The goal of my code is to take an n-by-n logical array of values and output a cell vector containing the column indices of each true (1) element in the input matrix. Choose a web site to get translated content where available and see local events and But another critical thing is to use booleans not numeric 1 and 0 here. I have a nested cell array pos{1X4} >> {6830X1}{6824X1}{6834X1}{6826X1}{6842X1}{6840X1}{6836X1}{6844X1}{6837X1}{6833X1} Accelerating the pace of engineering and science, MathWorks leader nello sviluppo di software per il calcolo matematico per ingegneri e ricercatori, Navigazione principale in modalit Toggle, >> {6830X1}{6824X1}{6834X1}{6826X1}{6842X1}{6840X1}{6836X1}{6844X1}{6837X1}{6833X1}. You can nest any number of cell and structure arrays. should to be positive integers or logical values, %create variable with minimum ROI position, %create variable with maximum ROI position, %shift TBa position to start at 0 when ROI starts, So this is part of code where I am facing porblem and time_0 is cell array, More info is probably needed but, from the code that I'm seeing you don't need the '. Other MathWorks country sites are not optimized for visits from your location. You need to use parenthesis instead of curly braces to do the indexing. If you try to refer to elements outside an array on the right side of an assignment statement, MATLAB throws an error. Cell arrays commonly contain either lists of text, Cell arrays commonly contain either lists of text, did anything serious ever run on the speccy? MathWorks is the leading developer of mathematical computing software for engineers and scientists. If you want to slice a cell-array, use parentheses. Logical indexing in cell array - MATLAB Answers - MATLAB Central Logical indexing in cell array Follow 346 views (last 30 days) Show older comments matuser123 on I need to find the cells that contain the string EXPERIMENT with the given index of my cell array. The size of the array increases to accommodate the newcomers. To access the last element of an array stored in cell array C at location {m,n}, y = C {m,n} (end); To access the last element of all cells stored in cell array C, y = rev2022.12.9.43105. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. data =readtable ('EURUSD=X.csv'); Warning: Column headers from the file were modified to make them valid MATLAB identifiers before creating variable names for the table. And so the you get the, Index exceeds the number of array elements. Create Cell Array. To refer to elements of a cell array, use array indexing. Cell array indices in smooth parentheses refer to sets of cells. Web browsers do not support MATLAB commands. Specify a date as a character vector, and temperatures as an array of doubles. Unable to complete the action because of changes made to the page. For example, C{2,2} returns a structure array, where Field2 contains a 5-by-5 numeric array of fives. Every variable in MATLAB is an array that can hold many numbers. Every variable in MATLAB is an array that can hold many numbers. arrays matlab indexing cell-array Share https://www.mathworks.com/matlabcentral/answers/515253-cell-arrays-and-indexing, https://www.mathworks.com/matlabcentral/answers/515253-cell-arrays-and-indexing#comment_820999, https://www.mathworks.com/matlabcentral/answers/515253-cell-arrays-and-indexing#answer_423895, https://www.mathworks.com/matlabcentral/answers/515253-cell-arrays-and-indexing#comment_821006, https://www.mathworks.com/matlabcentral/answers/515253-cell-arrays-and-indexing#comment_821008, https://www.mathworks.com/matlabcentral/answers/515253-cell-arrays-and-indexing#comment_821345, https://www.mathworks.com/matlabcentral/answers/515253-cell-arrays-and-indexing#answer_423897. https://it.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array, https://it.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510122, https://it.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510132, https://it.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510147, https://it.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510172, https://it.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510202, https://it.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510637, https://it.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#answer_1124452. You have a modified version of this example. Enclose numeric indices in smooth parentheses. These Index must not exceed 11. ok that sounds my suggestion has fixed one problem and uncovered another. Unable to complete the action because of changes made to the page. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Without having the raw data infront of me, I'm making assumtions. Here's an example of how it's supposed to work: % setting the size of X to variable so it can change with input, % add previous cells of opp to new cells as iterations continue, % if value of X(ii) == 0 no new values added to opp, Unable to perform assignment because the indices on the left side are not compatible with the size of the, opp(ii) = opp, {ii}; %add previous cells of opp to new cells as iterations continue. Ok, this is what it boils down to I think, but I'm still not sure what is wrong with it. If that is the case, you can try something like: You may receive emails, depending on your. matlab indexing cell-array Share Follow asked Mar 4, 2016 at 16:34 K. Sante 29 5 A matrix must have fixed length and width, if you have varying length in your https://au.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array, https://au.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510122, https://au.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510132, https://au.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510147, https://au.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510172, https://au.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510202, https://au.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510637, https://au.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#answer_1124452. WebCell array indexing in matlab. You clicked a link that corresponds to this MATLAB command: Run the command by entering it in the MATLAB Command Window. Based on I am familiar with the find() fxn; however, doesn't it out put the indices as if the columns were stacked on top of each other in a vertical list? However, on the left side of an assignment statement, you can specify elements outside the current dimensions. example that illustrates the storage and what you're trying to get -- it's certainly not clear how a 1x4 is related to what you show that has like 10 humongous vectors strung together Once it is known what the actual storage is, the addressing code will work whether there are 5 or 1E6 elements in the arrays, so make it easy on yourself and debug the small problem first. For example, to create a 2-by-2 cell array that is a subset of C, use smooth parentheses. WebRefer to fields of a struct array with dot notation, and index into the array as described for numeric and cell arrays. If that is the case, you can try something like: You may receive emails, depending on your. your location, we recommend that you select: . 1980s short story - disease of self absorption. Learn more about cell array, indexing MATLAB I have a nested cell array pos{1X4} >> sites are not optimized for visits from your location. Unable to complete the action because of changes made to the page. No, it isn't. I am trying to index from cell array, but I am getting Unable to use a value of type cell as an index. Reload the page to see its updated state. Haupt-Navigation ein-/ausblenden. Did the apostolic or early church fathers acknowledge Papal infallibility? MathWorks is the leading developer of mathematical computing software for engineers and scientists. When you try to access contents of multiple cells, MATLAB creates a comma-separated list. You should look into the find ( Choose a web site to get translated content where available and see local events and For example, C{2,1} returns the cell array, {'one','two'}. of the corresponding cell in the cell vector. Reload the page to see its updated state. Create a cell array that contains several temperature readings taken on a given date. Find the treasures in MATLAB Central and discover how the community can help you! You clicked a link that corresponds to this MATLAB command: Run the command by entering it in the MATLAB Command Window. Index in position 2 exceeds array bounds (must not exceed 4). WebA cell array is a data type with indexed data containers called cells. For example, consider the 4-by-4 matrix A: There are two ways to refer to a particular element in an array. to index it. sites are not optimized for visits from your location. Find the treasures in MATLAB Central and discover how the community can help you! offers. Zero-Based and One-Based Indexing with the Index Vector Block. View MATLAB Command. This example shows how the Index Vector block works with zero-based and one-based indexing. The Index Vector block is from the Simulink Signal Routing library. It is a special configuration of the Multiport Switch block. To configure the Multiport Switch block as an Index Vector block, set the Number of data ports to 1 and Data port order to Zero-based contiguous. A cell See below. Yes I tried, but both is code are not working. Confusingly, a boolean array is displayed as ones and zeros in Matlab, although it is represented quite differently internally. For example, add nested cells and structures to C. Access parts of the new data using curly braces, smooth parentheses, or dot notation. The point of indexing is mainly to get the value. You have a modified version of this example. Access the element in the fifth row and first column of that field using dot notation and smooth parentheses. Index must not exceed 11. is a cell containing an array of indices. To denote missing values in floating point arrays, we often use NaN. Access part of the contents of a cell by appending indices, using syntax that matches the data type of the contents. Learn more about cell array, indexing MATLAB. Should I give a brutally honest feedback on course evaluations? Why is apparent power not measured in Watts? Less common, but sometimes useful, is to use a single subscript that traverses down each column in order: Using a single subscript to refer to a particular element in an array is called linear indexing. If you omit the middle step, as in start:end, MATLAB uses the default step value of 1. Choose a web site to get translated content where available and see local events and Learn more about cell array, indexing MATLAB. Accelerating the pace of engineering and science. Is it correct to say "The glue on the back of the sticker is dying down so I can not stick the sticker to the wall"? It's kind of embarassing that I am now needing help with the reverse of my last assignment haha. This is the reverse of your last assignment. For example, consider Name of a play about the morality of prostitution (kind of). WebLearn more about cell array, indexing MATLAB. Like using it as a pointer and pass it to a function? Does find(X(ii) == 1) not output the index 2? And so the you get the, Index exceeds the number of array elements. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Technically, a logical array is represented internally the same as a uint8 array of ones and zeros (one byte per element, set to 0x00 or 0x01). Does balls to the wall mean full speed ahead or full speed ahead and nosedive? Choose a web site to get translated content where available and see local events and offers. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. It is the ii'th, This is an alternative to the looped version, You may receive emails, depending on your. Based on How can I use a VPN to access a Russian website that is banned in the EU? It just has a different datatype flag, so it's. I am trying to index from cell array, but I am getting Unable to use a value of type cell as an index. The horizontal concatenation, together with indexing by a logical array (in the line I corrected) makes sense as somehow selecting and concatenating non-NaN Sed based on 2 words, then replace whole line with variable. your location, we recommend that you select: . You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. WebEach cell contains a piece of data. upperLeft = C (1:2,1:2) upperLeft= 22 cell array {'one'} {'two'} { [ 1]} { [ 2]} Update sets of cells >> {6830X1}{6824X1}{6834X1}{6826X1}{6842X1}{6840X1}{6836X1}{6844X1}{6837X1}{6833X1}. The row index of the logical true values is the index of the cell in the cell vector, and the column index is the. MathWorks is the leading developer of mathematical computing software for engineers and scientists. The second cell is correct, but why isn't the first? WebI am trying to index from Cell array . Accelerating the pace of engineering and science. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Set 'VariableNamingRule' to 'preserve' to use the original column headers as table variable names. Based on your location, we recommend that you select: . To refer to elements of a cell array, use array indexing. Because each cell can contain a different type of data, you cannot assign this list to a single variable. time_0 = cellfun(@(t) find(t == 0,1), t); a numerical array instead of a cell array, then you will be able to use. In MATLAB, for a cell array, there is content indexing ( {} ), and thus cell indexing ( ()) is only for selecting a subset from the cell array, right? It needs only one loop over the number of rows, and the cell array element for that row contains the column indexes of the 1 elements. Learn more about reach to nested array elements in cell array Unable to complete the action because of changes made to the page. >> {6830X1}{6824X1}{6834X1}{6826X1}{6842X1}{6840X1}{6836X1}{6844X1}{6837X1}{6833X1}. offers. For example, C{1,1} returns the 1-by-3 numeric vector, [1 2 3]. Navigazione principale in modalit Toggle. offers. Index exceeds the number of array elements. Are there breakers which can be triggered by an external signal and have to be reset by hand? Menu de navigation principal. Index exceeds the number of array elements. WebI am trying to index from Cell array . These approaches are indexing by position, linear indexing, and logical indexing. For example, select all the columns in the third row of A: The colon operator also allows you to create an equally spaced vector of values using the more general form start:step:end. Array Indexing In MATLAB, there are three primary approaches to accessing array elements based on their location (index) in the array. Cell Arrays and Indexing?. A cell array is a data type with indexed data containers called cells, where each cell can contain any type of data. WebDescription. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Accelerating the pace of engineering and science. Enclose cell array indices in curly braces. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. offers. is an array of 11 elements and one or more values in the, array is greater than 11. Index exceeds the number of array elements. For example, list the elements in the first three rows and the second column of A: The colon alone, without start or end values, specifies all of the elements in that dimension. It needs only one loop over the number of rows, and the cell array element for that row contains the column indexes of the 1 elements. WebMATLAB returns the contents of the cells as a comma-separated list. Learn more about cells, cell arrays, for loops Do you want to open this example with your edits? Ready to optimize your JavaScript with Rust? This example shows techniques for accessing data in arrays stored within cells of cell arrays. Access the complete contents of a particular cell using curly braces, {}. Cell array indexing in matlab. First off, of course, is to reconsider how you got such a convoluted problem to solve in the first place--illustrating how this comes about may lead to a far more efficient and convenient storage scheme. You are pretty close, but ask yourself what does X(ii) mean? Do you want to open this example with your edits? Why is this usage of "I've to work" so awkward? https://nl.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array, https://nl.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510122, https://nl.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510132, https://nl.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510147, https://nl.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510172, https://nl.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510202, https://nl.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#comment_2510637, https://nl.mathworks.com/matlabcentral/answers/1875047-i-am-trying-to-index-from-cell-array#answer_1124452. Find centralized, trusted content and collaborate around the technologies you use most. Create a cell array by using the {} operator or the I have a nested cell array pos{1X4} >> {6830X1}{6824X1}{6834X1}{6826X1}{6842X1}{6840X1}{6836X1}{6844X1}{6837X1}{6833X1} Yes I tried, but both is code are not working. When I input the simple matrix c shown below, that's the output I get. Why did the Council of Elrond debate hiding or sending the Ring away, if Sauron wins eventually in that scenario? Asking for help, clarification, or responding to other answers. Index must not exceed 11. ok that sounds my suggestion has fixed one problem and uncovered another. Without having the raw data infront of me, I'm making assumtions. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, Indexing content of cell array using cell array of indices, Matlab: enter same vector repeatedly to matrix using logical indexing. is an array of 11 elements and one or more values in the, array is greater than 11. Accelerating the pace of engineering and science. Index must not exceed 11. ok that sounds my suggestion has fixed one problem and uncovered another. Making statements based on opinion; back them up with references or personal experience. Without having the raw data infront of me, I'm making assumtions. Are defenders behind an arrow slit attackable? You can index into a cell array using smooth parentheses, (), and into the contents of cells using curly braces, {}. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Access the contents of the second cell within that cell array using curly braces. MATLAB assigns to the variables in column order. First off, of course, is to reconsider how you got such a convoluted problem to solve in the first place--illustrating how this comes about may lead to a far more efficient and convenient storage scheme. Refer to fields of a struct array with dot notation, and index into the array as described for numeric and cell arrays. Thanks for contributing an answer to Stack Overflow! The most common way is to specify row and column subscripts, such as. You need to loop over the rows, not the columns. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. WebLearn more about cell array, indexing MATLAB. Learn more about reach to nested array elements in cell array Debian/Ubuntu - Is there a man page listing all the version codenames/numbers? Web browsers do not support MATLAB commands. For example, C{2,2} returns a structure array, where Field2 sites are not optimized for visits from your location. Learn more about cells, cell arrays, for loops The goal of my code is to take an n-by-n logical array of values and output a cell vector containing the column indices of each true (1) element in the input matrix. Other MathWorks country Appealing a verdict due to the lawyers being incompetent and or failing to follow instructions? To learn more, see our tips on writing great answers. I already tried approaches like strcmp or strfind, but I am still Accelerating the pace of engineering and science. For example, for each row in a matrix (2-dimensional), there is the same number of elements - all rows have the same number of columns. Cell Array Indexing Summary References Arrays As you probably already know, arrays in MATLAB are rectangular looking in any two dimensions. Based on Technically, a logical array is represented internally the same as a uint8 array of ones and zeros (one byte per element, set to 0x00 or 0x01). Other MathWorks country your location, we recommend that you select: . Cell Arrays and Indexing?. 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