Before, I merely just wanted an output of 1 or 0, nothing else. sites are not optimized for visits from your location. Short of a mex routine that can avoid the creation of a potentially large intermediate array, I think you are stuck with isnan( ). You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Input the matrix, then use MATLAB's built-in inv() command to get the inverse. "I just didn't want to add another variable to the list I already had", If that is too much, then, Sure, you can use. The purpose is that I have to get out the NaNs in DebtEquityY and MarketCapY in order to calculate the stock returns of my Belgian dataset. How can I find the exact location of NaN elements in a matrix. offers. How can I find which row has a NaN value in a column matrix or vice versa.? I want to extract now exactly those 300 elements in a new Array, let's call it myVec and in Addition make sure it is sorted backwards (last element in myMatrix becomes first element in myVec). Because it kept giving me 'ans' and I was uncertain exactly how to mitigate it, I thought I would turn this into an extended learning experience with this particular code. Solution Use the following syntax: res = ~any (~isnan (X (:))); if res==true it means that that the matrix contains only nan values. It only came back up a few minutes ago. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. The file is to big to attach. For example, consider a 3-by-3 matrix. You can only, set the nan value to some other valid value, remove the whole row with the nan in it, or. But I would not expect that other people would find it useful. I was hoping I could get away with working in the command prompt rather than write a routine directly in the program, as it is complicated enough already. your location, we recommend that you select: . DebtEquityY and MarketCapY are both one column with NaN, TotalReturnY contains 13 columns in the matrix. I need to delete them in the MarketCapY column and the DebtEquityY column. Note that displaying in the command window is slow. txt Text data . If the sum is 0, then no NaN values can be in the matrix. MathWorks is the leading developer of mathematical computing software for engineers and scientists. 5. . A = [1,3,5,7,NaN,10,NaN,4,6,8] A = 110 1 3 5 7 NaN 10 NaN 4 6 8. I don't understand why you have that if-test in the function at all. Unable to complete the action because of changes made to the page. Trapezoidal numerical integration in MATLAB Difference between Convolution VS Correlation How to add White Gaussian Noise to Signal using MATLAB ? If DebtEquityY, MarketCapY, and TotalReturnY are all vectors, and they all have nan's in the, position, that would work. In R2018a and earlier, use the "isnan" function: A = [1,NaN,2]; B = A (~isnan (A)) More Answers (3) 4 Link Translate per isakson on 25 May 2018 If it is anything other than 0, then at least one NaN exists in the matrix. was due to how you called the function, not because of how the function was defined: if you do not allocate the output to a variable then. isfinite | ismissing | isinf | is* | NaN | anynan. For other functions, it depends on what you actually need. You may receive emails, depending on your. How can I find which row has a NaN value in a column matrix or vice ve. Because I needed to test a whole multitude of different variables, I just wanted an output to say if NaNs were in the variable or not. windowsexcel '#N/A''ActiveX VT_ERROR:' custom Second output of the function corresponding to processFcn or any other MATLAB function behaved the same way: @Stephen Cobeldick, Thanks a bunch, the solution is simply to remove. Then I would move on and test another variable. For other functions, it depends on what you actually need. You may receive emails, depending on your. MATLAB: Finding and removing NaN values in a matrix nan Hi Guys, I am dealing with matrices of the size 1268*100. This function fully supports GPU arrays. A linear index allows use of a single subscript to index into an array, such as A(k). Accelerating the pace of engineering and science. You only need that one computation line in the function. Or you could use the anyEq mex routine from the FEX by Jan Simon to avoid the intermediate array: https://www.mathworks.com/matlabcentral/fileexchange/26867-anyeq. Is there a way delete it before it is printed to the screen? It is exactly what I wanted. Create a row vector and determine which elements are NaN. It is rather unlikely that people wanting to use your function will only want the result to be displayed to the screen. I figured it was easier to define a function that just performed this test simply and quickly for me, as none existed in MATLAB that did exactly this without adding a whole mess of other junk to my variable list, which would then still require me to sort out. If they have nan's in different locations then you'll have to. I already tried something, but I don't know if it's correct. Create an array and find the elements with NaN values. B = NaN (4) gives the 44 matrix, which contains special values that cannot be a real number or complex number. Choose a web site to get translated content where available and see local events and I wish to eliminate certain rows from this matrix. This is why I wrote the if statement. import numpy as np Creating an Array Syntax - arr = np.array([2,4,6], dtype='int32') print(arr) [2 4 6] In above code we used dtype parameter to specify the datatype To create a 2D array and syntax for the same is given below . sites are not optimized for visits from your location. Other MathWorks country Any guidance will be appreciated thanks. sites are not optimized for visits from your location. Imagine if. thy 0 Comments For more real or imaginary part is NaN, and 0 for elements Determine NaN Elements in Complex Numbers Create an array of complex numbers. E.g., counting the number of NaN's. TF = isnan (A) TF = 1x10 logical array 0 0 0 0 1 0 1 0 0 0. I have a cell matrix containing numeric values and NaN. Hi Guys, How can I find the exact location of NaN elements in a matrix. Can you implement it with my example? I do certain operations to get integer values for the rows that I want to keep and NaN value for the ones I dont. Find the treasures in MATLAB Central and discover how the community can help you! Choose a web site to get translated content where available and see local events and Is there a quick method of finding out whether or not a matrix or a vector in matlab has. Accelerating the pace of engineering and science. OK, so based on what you are currently trying to do, what exactly would you like your function to output? Hi every one, I have a matrix A=1180. Other MathWorks country For Your suggestion seems to have lead me to figuring out how to quickly decipher if any NaN values exist in the matrix! isinf(complex(Inf,NaN)) and MATLAB: How To Efficiently Remove NaN Elements from Matrix I got code that does it below but its a little slow (the matrix is big) is there a better way to do it? TF = isnan(A) returns a Concatenate 2D Numpy array axis column wiseFor working with numpy we need to first import it into python code base. Reload the page to see its updated state. Create an array of complex numbers. I already tried something, but I don't know if it's correct. So this is treated as efficient as possible: Thanks, I'll play around with this a bit later! Accelerate code by running on a graphics processing unit (GPU) using Parallel Computing Toolbox. 3 Comments Show 2 older comments Image Analyst on 26 Dec 2018 That wouldn't work for a matrix, but would for a vector. If there are Nans scattered around the matrix, you cannot delete them. I don't get it quite clear. Choose a web site to get translated content where available and see local events and offers. Better use M (~isnan (M (:, 1)), :) which will remove any row that contains at least one NaN. Sign in to answer this question.It is easy to find the inverse of a matrix in MATLAB. If A contains complex which is clearly the function you want to use. Sounds like you're wanting option 3 but seeing the matrices would help. I need more precise info :(. Input array, specified as a scalar, vector, matrix, or multidimensional Find the treasures in MATLAB Central and discover how the community can help you! You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. You cannot remove all NaNs and keep the shape of the matrix. Thanks for a quick help even my data was too lARGE, thanks for providing an efficient solution, for me this actually creates a 1x0 variable named row and another one named col. None of the variables tells me the index :(, An empty result means that there are no NaNs in the martix, This gives me just an array of 0 and 1. Maybe you could at least vote for the answers below or accept the best one to give them reputation points. You may receive emails, depending on your. A large matrix filled with mostly 0's (after applying isnan(MATRIX)) does not really cut it. (using vectorisation) The rmmissing function detects and removes NaN values, and the fillmissing function detects NaN values and replaces them with non- NaN values. I.e., how many outputs and what would they be? (true). Here, it would have listed (among other things) ISNAN True for Not-a-Number. You may need to change your code (the order of the. I know, if I wanted the sum alone. Theme Copy hasAnyNaN = anyEq (X, NaN); This does not create a temporary array like isnan (X) and stops the search at the first match already. Image Analyst That wouldn't work for a matrix, but would for a vector. [row, col] = find (isnan (DebtEquityY)); out = DataY (any (~isnan (DebtEquityY),2),:); You can see that the first two columns of DataY must be eliminated. @Stephen Cobeldick, @James Tursa: I realize that the output would have to be allocated to a variable, and I have no problem that 'ans' is that variable. Replace the NaN values with 0. Web browsers do not support MATLAB commands. remove the whole column with the nan in it. I tried this: That wouldn't work for a matrix, but would for a vector. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. information, see Run MATLAB Functions with Distributed Arrays (Parallel Computing Toolbox). Here is a fast C-Mex function to find out, if any element of one array occurs in the other: FEX: anyEq . Accelerating the pace of engineering and science. Would there be simple ways of counting how many NaN's occur, and identify their location in a given matrix? Thus, my function would then output a 1 or 0 for true or false, and yield the sum of NaNs in the matrix. is the default. logical array containing 1 (true) where the elements . Do you want to open this example with your edits? I forgot about the built-in 'sum' command, but your listing just gave me an idea. lookfor nan will quickly give you the names of some functions that work with NaNs, as well as giving you the first line of their help blocks. For example, if your input had been A = [1 2; 3 NaN]; If I keep everything else the same, it works! I have an array 81x81x81 and 2 of its values are inf while 0 are NaN, however I am not sure how to find the indices of the loactions they lie in. This is what I have put where V is the array: h = find (~isfinite (V)); k=find (isnan (V)); h returns a huge 531439x1 double matrix which isn't right and k returns . Partition large arrays across the combined memory of your cluster using Parallel Computing Toolbox. Determine whether the complex numbers contain NaN. And yes, you can do similar calculations with the isinf( ) function. Find the treasures in MATLAB Central and discover how the community can help you! A Computer Science portal for geeks. Too bad! elements. You clicked a link that corresponds to this MATLAB command: Run the command by entering it in the MATLAB Command Window. I'm not sure this is really what you want. errorMat=isnan (rates); errorRows=ind (errorMat); for i=1:length (errorRows) rates (:,errorRows (i)) = []; end matlab Share Improve this question Follow edited May 23, 2017 at 11:58 How would I be able to convert this 'ans' tag to 'sum'. This problem only appears for me when defining functions for some reason. MathWorks is the leading developer of mathematical computing software for engineers and scientists. I need to replace all the zeros by NaN, noted that zeros are also randomly distributed in matrix A. I have tried for loop but do not get the desired result. Reload the page to see its updated state. The other program worked, and did help me find what I wanted, but because I found the function so useful, and imagine others would too, I wanted to clean it up before storing a 'good' copy, and/or giving it to others. any ideas? I should have mentioned that anyEq treats NaN's as equal for the purpose of creating a result. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Reload the page to see its updated state. Accepted Answer: madhan ravi. Find NaN elements in a matrix - MATLAB Answers - MATLAB Central Find NaN elements in a matrix Follow 1.636 views (last 30 days) Show older comments NS on 12 Oct 2011 Vote 1 Link Translate Commented: Whitney on 22 Nov 2021 Accepted Answer: Walter Roberson Hi Guys, How can I find the exact location of NaN elements in a matrix. I assumed I had to define a function in this way. For example, nnz() is often faster than sum() for this purpose. Because I was troubleshooting in this particular way, it did me no good to do so either. Can it be done without loop ? Based on 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. NaN . to appear and be listed. [row, col] = find (isnan (DebtEquityY)); out = DataY (any (~isnan (DebtEquityY),2),:); You can see that the first two columns of DataY must be eliminated. Get all the non NaN values in the matrix in another step: [rwpRow, rwpCol] = find (~isnan (nantest)); vals = nantest (~isnan (nantest)); Share Follow answered Feb 9, 2016 at 0:40 Some Guy 1,777 11 15 Add a comment Your Answer Post Your Answer Based on I am slightly confused with respect to your data set, and what you want to do with it. Choose a web site to get translated content where available and see local events and Example X = nan (3,3) ~any (~isnan (X (:))) X (1,2) = 0; ~any (~isnan (X (:))) Results ans = 1 ans = 0 Share Improve this answer Follow edited Jun 28, 2016 at 12:59 answered Jun 28, 2016 at 8:59 ibezito 5,692 2 20 45 Thus, linear indexing numbers the elements in the columns from top to bottom, left to right. So this is treated as efficient as possible: Theme Copy X = NaN (1, 1e6); This function fully supports tall arrays. For a more general purpose function, use isnan() and regionprops() (in the Image Processing Toolbox). out = DataY(:,~any(isnan(MarketCapY),1)); out = DataY(:,~any(isnan(DebtEquityY),1)); I apologise for the delay my ISP was down in a U.S. nation-wide fail for. For example I have the following matrix: A = { 1, 12, NaN; 1 ,4, NaN; 1 , 2 , NaN ; NaN, NaN, NaN; 1, 2, NaN }; I would like to remove the NaN and resize the matrix to have this matrix. You can also specify a size range for the groups if you want, like ignore nans that are only one element long or whatever. Find NaN elements in a matrix - MATLAB Answers - MATLAB Central Find NaN elements in a matrix Follow 1.647 views (last 30 days) Show older comments NS on 12 Oct 2011 Vote 1 Link Translate Commented: Whitney on 22 Nov 2021 Accepted Answer: Walter Roberson Hi Guys, How can I find the exact location of NaN elements in a matrix. sites are not optimized for visits from your location. Note: I might suggest "anynan" as the function name. This function fully supports distributed arrays. E.g.. Also, the speed advantage is not necessarily there for the mex routine since the MATLAB functions any( ) and isnan( ) are probably multi-threaded in the background. Index into A with TF to access the elements of A that are NaN. All values of matrix A are either zeros or negative numbers. Accelerating the pace of engineering and science. So I would like to 1) suppress 'ans' output and 2) learn how to change 'ans' to 'sum'. offers. offers. (false) where they are not. your location, we recommend that you select: . Extended Capabilities C/C++ Code Generation Generate C and C++ code using MATLAB Coder. I've got a large matrix and for two columns I need to find the NaNs and to delete them. Other MathWorks country Or do I have to do something else to delete it? isfinite(x), isinf(x), and offers. So I still need the two columns to determine that. MATLAB treats the array as a single column vector with each column appended to the bottom of the previous column. your location, we recommend that you select: . Based on A = [2 + 1i, 1/0 + 3i, 1/2 - 1i*NaN] A = 13 complex 2.0000 + 1.0000i Inf + 3.0000i NaN + NaNi TF = isnan (A) TF = 1x3 logical array 0 0 1 Replace NaN Elements Create an array and find the elements with NaN values. Accelerating the pace of engineering and science. out = DataY(~any(isnan(DebtEquityY),2),:); . And if that's the case, they can simply define the function. The reason that a vector rather than a matrix is returned is that MATLAB doesn't know that your "mask" is going to still be rectangular. https://www.mathworks.com/matlabcentral/answers/437289-how-to-find-nan-in-a-matrix-and-delete-it, https://www.mathworks.com/matlabcentral/answers/437289-how-to-find-nan-in-a-matrix-and-delete-it#comment_654515, https://www.mathworks.com/matlabcentral/answers/437289-how-to-find-nan-in-a-matrix-and-delete-it#comment_654526, https://www.mathworks.com/matlabcentral/answers/437289-how-to-find-nan-in-a-matrix-and-delete-it#comment_654528, https://www.mathworks.com/matlabcentral/answers/437289-how-to-find-nan-in-a-matrix-and-delete-it#answer_354019, https://www.mathworks.com/matlabcentral/answers/437289-how-to-find-nan-in-a-matrix-and-delete-it#comment_654777, https://www.mathworks.com/matlabcentral/answers/437289-how-to-find-nan-in-a-matrix-and-delete-it#comment_654822, https://www.mathworks.com/matlabcentral/answers/437289-how-to-find-nan-in-a-matrix-and-delete-it#comment_654890, https://www.mathworks.com/matlabcentral/answers/437289-how-to-find-nan-in-a-matrix-and-delete-it#comment_654894, https://www.mathworks.com/matlabcentral/answers/437289-how-to-find-nan-in-a-matrix-and-delete-it#comment_654965, https://www.mathworks.com/matlabcentral/answers/437289-how-to-find-nan-in-a-matrix-and-delete-it#answer_354009. Replace the NaN values with 0. I.e., it uses the mxIsNan( ) API function instead of comparing values directly (which would have given a false result if the check had been done this way internally as you pointed out). Unable to complete the action because of changes made to the page. of A are NaN, and 0 In this column the first 15 elements are NaN and then 300 elements contain data and the rest of the column is NaN again. raw Numeric and text data . array. Other MathWorks country Determine whether the complex numbers contain NaN. You also need to be certain that you are selecting. GPU Code Generation The rmmissing function detects and removes NaN values, and the fillmissing function detects NaN values and replaces them with non- NaN values. If you want this general purpose code, let me know. https://de.mathworks.com/matlabcentral/answers/18150-find-nan-elements-in-a-matrix, https://de.mathworks.com/matlabcentral/answers/18150-find-nan-elements-in-a-matrix#answer_24429, https://de.mathworks.com/matlabcentral/answers/18150-find-nan-elements-in-a-matrix#comment_40159, https://de.mathworks.com/matlabcentral/answers/18150-find-nan-elements-in-a-matrix#comment_40161, https://de.mathworks.com/matlabcentral/answers/18150-find-nan-elements-in-a-matrix#comment_600656, https://de.mathworks.com/matlabcentral/answers/18150-find-nan-elements-in-a-matrix#comment_812085, https://de.mathworks.com/matlabcentral/answers/18150-find-nan-elements-in-a-matrix#comment_1036732, https://de.mathworks.com/matlabcentral/answers/18150-find-nan-elements-in-a-matrix#comment_1846879, https://de.mathworks.com/matlabcentral/answers/18150-find-nan-elements-in-a-matrix#answer_24428, https://de.mathworks.com/matlabcentral/answers/18150-find-nan-elements-in-a-matrix#answer_24427, https://de.mathworks.com/matlabcentral/answers/18150-find-nan-elements-in-a-matrix#comment_40160, https://de.mathworks.com/matlabcentral/answers/18150-find-nan-elements-in-a-matrix#answer_318571. I never wrote a function before, but for troubleshooting I now see how wonderful they can be without cluttering the variables list! That will always print to the screen. more information, see Run MATLAB Functions in Thread-Based Environment. Calculate with arrays that have more rows than fit in memory. This function fully supports thread-based environments. . All I would need to do is check if the final result is equal to 0 after the summation! isnan(z) can both return logical 1. That is, I defined it now as: If you define your function this way, the only thing it will really be able to do is print stuff to the screen. Run MATLAB Functions in Thread-Based Environment, Run MATLAB Functions with Distributed Arrays. cell array . I assume such techniques would be applicable to finding infinities as well, am I correct? For example, consider the following: A = [1,NaN,2]; B = rmmissing (A) The result is the vector "B = [1 2]". Below, you find the code that is already written. Or if you want locations, then find( ) etc. cell array . You have to decide, what you want instead: X = X (~any (isnan (X, 2))) X = X (~all (isnan (X, 2))) X = X (~isnan (X)) Or perhaps you want a cell array containing the different . Based on isnan(complex(Inf,NaN)) both return logical 1. A = [2 + 1i, 1/0 + 3i, 1/2 - 1i*NaN] A = 13 complex 2.0000 + 1.0000i Inf + 3.0000i NaN + NaNi TF = isnan (A) TF = 1x3 logical array 0 0 1 Replace NaN Elements Create an array and find the elements with NaN values. Matlab NaN function is written Special values as NaN So for creating a 44 matrix; we used the syntax of NaN function. If x is a real scalar, exactly one of Thanks for a quick help even my data was too lARGE, thanks for providing an efficient solution, for me this actually creates a 1x0 variable named row and another one named col. None of the variables tells me the index :(, An empty result means that there are no NaNs in the martix, This gives me just an array of 0 and 1. Find NaN elements in a matrix - MATLAB Answers - MATLAB Central Find NaN elements in a matrix Follow 1,750 views (last 30 days) Show older comments NS on 12 Oct 2011 Vote 1 Link Commented: Whitney on 22 Nov 2021 Accepted Answer: Walter Roberson Hi Guys, How can I find the exact location of NaN elements in a matrix. You can only get the rows and columns from the call to find since it finds the 1s in ~isnan (nantest). Thanks for jump-starting my thinking! matrix . Use the isnan or ismissing function to detect NaN values in an array. Link. I already tried something, but I don't know if it's correct. Since you don't pass anything back to the caller, that sum of the number of nans you calculated gets thrown away when the function returns. more information, see Tall Arrays. Choose a web site to get translated content where available and see local events and MathWorks ist der fhrende Entwickler von Software fr mathematische Berechnungen fr Ingenieure und Wissenschaftler. delete) all the rows where at least one column includes NaN, then just: try my snip function. " " '#N/A''#N/A' basic import mode . Find () function in MATLAB Eigenvalues and Eigenvectors in MATLAB Simpson's Rule in MATLAB Turn a Matrix into a Row Vector in MATLAB 3D Plots in MATLAB How to plot a Histogram in MATLAB ? For The purpose of my code is to determine whether or not a debt/equity ratio influences the height of stock returns of Belgian companies. NaN values? Unable to complete the action because of changes made to the page. That is how MATLAB works. Starting in R2018b, you can use the "rmmissing" function to remove "NaN" values from an array. Find the treasures in MATLAB Central and discover how the community can help you! So, in case that you want to ignore (i.e. For more information, see Run MATLAB Functions on a GPU (Parallel Computing Toolbox). I work with really large arrays (size 1500*200). I now see what you meant. Determine NaN Elements in Complex Numbers Create an array of complex numbers. Share It will find all groupings of Nans no matter how long or short they are. Generate C and C++ code using MATLAB Coder. I am just using this function to test when NaNs first appear in my program. Determine whether the complex numbers contain NaN. Select a Web Site. Can you attach your data (equity, TotalDebt, MarketCap, TotalReturn) in a .mat file so we can visualize what you need. I just didn't want to add another variable to the list I already had. where both real and imaginary parts are not NaN. You cannot use anyEq(MATRIX,NaN) because one of the properties of nan is that nan == nan is false. Ok, I wrote a function that should be able to handle this, but I keep receiving an 'ans' output and can't seem to figure out why it is not being suppressed. Based on your location, we recommend that you select: . I work with really large arrays (size 1500*200). I work with really large arrays (size 1500*200). MarketCapY= MarketCap (:,12*i+1:12*(i+1)+1); TotalReturnY = TotalReturn (:,12*i+1:12*(i+1)+1); DataY= [DebtEquityY MarketCapY TotalReturnY]; out = DataY(any(~isnan(DebtEquityY),2),:); You can see that the first two columns of DataY must be eliminated. DataY = [DebtEquityY MarketCapY TotalreturnY]; matrix, and you apparently want to delete the. If the function has an output argument defined then it will be allocated when the function is called, either to the specified output variable or to. So this code would delete all the NaN in the columns MarketCapY and DebtEquityY? You have a modified version of this example. When you don't know the name of a function in MATLAB, try lookfor. MathWorks is the leading developer of mathematical computing software for engineers and scientists. Here is a fast C-Mex function to find out, if any element of one array occurs in the other: This does not create a temporary array like. Index into A with TF to access the elements of A that are NaN. For a complex scalar z, isinf(z) and Unable to complete the action because of changes made to the page. Reload the page to see its updated state. Don't get me wrong, I would information of finding out where such NaN's occur and how to count how many NaN values appear in a given matrix, but I really would like to know if there is a simple way to identify if any NaN's at all appear in a given matrix with a simple 1 or 0 response, as it would save me time having to inspect the matrix or write a program to do it. Actually I would like to recommend a slightly different (and more general) approach. So, if the NaN is near the front of the matrix then the mex routine would probably be faster since it short-circuits and avoids the intermediate array. . Here B, is the name of the matrix. Create an array and find the elements with NaN values. numbers, isnan(A) contains 1 for elements with either Exactly: This cannot work, because all columns of a matrix must have the same number of rows. How can I find the exact location of NaN elements in a matrix. The 'ans' value is giving the sum of the number of NaN terms in the matrix. create the intermediate matrix but would be fast for the search. Keep in mind that a matrix must remain rectangular. Based on How can I remove the NaN values and "trim" my matrix. Extended Capabilities C/C++ Code Generation Generate C and C++ code using MATLAB Coder. Function with Argument Validation Define a function that restricts input to a numeric vector that contains no Inf or NaN elements. 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Choose a web site to get translated content where available and see local events and offers. and stops the search at the first match already. It will not be printed if you use a semi-colon: define your function without any output argument, or, help cannot show the output argument names, takes your code farther away from standard MATLAB practice, and means that you cannot test it simply from the command line. isnan(x) returns logical 1 This function uses the arguments keyword . Use the isnan or ismissing function to detect NaN values in an array. Thanks for the lesson. If so, this will probably work: out = DataY(~any(isnan(DataY(:,[1 2])),2),:), You may receive emails, depending on your. Other MathWorks country sites are not optimized for visits from your location. 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I need more precise info :(. MathWorks is the leading developer of mathematical computing software for engineers and scientists. your location, we recommend that you select: . But if the NaN is near the back of the matrix or not present, the MATLAB m-code could very well be faster even though it builds an intermediate array. How can I find which row has a NaN value in a column matrix or vice versa.? 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