It can't find things that don't exist. if and only if a is sorted, you can do it like this: Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Find the treasures in MATLAB Central and discover how the community can help you! When you ask a question , make sure you give an example clearly instead of advising others how to answer the question. See also SPARSE, IND2SUB, RELOP, NONZEROS. If so, you can use the Selector block, but you need to set the Index option to "Index vector (port)". the nonzero entries of the array X. K must be a positive integer, Can I infer that Schrdinger's cat is dead without opening the box, if I wait a thousand years? with sparse matrices. Building a safer community: Announcing our new Code of Conduct, Balancing a PhD program with a startup career (Ep. It says that these blocks don't accept variable-size vector as input. Is "different coloured socks" not correct? What one-octave set of notes is most comfortable for an SATB choir to sing in unison/octaves? MathWorks is the leading developer of mathematical computing software for engineers and scientists. You can also select a web site from the following list. If you really need the index value, you can feed the output of the Find block to a MinMax block set to Min. Not the answer you're looking for? To find indices of elements, we need to define a condition inside the find () function. first_non_NaN_index_of_X = find(~isnan(X), 1); Thanks, and what about last non NaN? Not the answer you're looking for? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Whoever wrote that template has done a lot of beginners a disservice by teaching them to use a function that would be better replaced by, would be much better, and would actually loop over all elements of the input array. Perhaps you are looking at ans for a different operation? A very simple approach which works with all values as start would be: This will also return the expected result changes = [5 10 14 17 20]. Find centralized, trusted content and collaborate around the technologies you use most. I am doing the svd in Simulink, I got the eigenvalue, now I want to set some eigenvalues smaller than a given value to zero. function to return the positions corresponding to an array element value. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I think it must be idx = find( abs(d)>tol, 1, 'last'); @user3051460: oops, that's a pretty fatal typo! Is it possible to define more than one function per file in MATLAB, and access them from outside that file? Let's say a[] is a sorted vector. Unable to complete the action because of changes made to the page. As you can see, maximum does not match any arr(p) values. Legendr (and others) proved that for any finite set of finite values, that there is a polynomial that goes through all of the values exactly (to within computation error.) Matlab find Series of First Negative Number, MATLAB: Find first element of a cell array that belongs to another cell array. % first occurrence of VALUE is found. i did the find function, but it gives me the ans vector with all of the values of the array and the results are in true or false for my condition( 0 & 1 ). https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#answer_305268, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#comment_2274915, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#comment_2274955, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#answer_404911, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#comment_786250, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#comment_786262, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#answer_447638, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#answer_750798, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#comment_1648538, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#comment_2186945, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#comment_2186960, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#comment_2186995, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#answer_809071, https://uk.mathworks.com/matlabcentral/answers/382803-how-to-find-the-position-of-a-number-in-an-array#comment_1785286. Why wouldn't a plane start its take-off run from the very beginning of the runway to keep the option to utilize the full runway if necessary? 3 Answers Sorted by: 37 ix = find (a>threshold,1); Pretty sure this will work Share Improve this answer Follow answered Aug 12, 2011 at 14:05 Phonon 12.5k 13 64 113 4 No, you don't. From Matlab documentation: I = FIND (X,K,'first') is the same as I = FIND (X,K). We know the fourth value is 9, but how to find the fourth value in MATLAB? the nonzero entries of the array X. X may be a logical expression. You only need to indicate 'last' if you want it the other way around. There I go not reading the OP's actual question. Learn more about maxk, max, linear indices, linear index, array MATLAB I have an 20x1 array of numbers. unless you are using K&R C from before C was standardized. How do I find the first(smallest) index ix such that a(ix) > threshold? Citing my unpublished master's thesis in the article that builds on top of it. (When) do filtered colimits exist in the effective topos? Thanks, @MattPhillips! You can also select a web site from the following list. Melden Sie sich an, um diese Frage zu beantworten. What happens if a manifested instant gets blinked? MathWorks is the leading developer of mathematical computing software for engineers and scientists. (When) do filtered colimits exist in the effective topos? Well, first off, how might you determine when to quit and would that not be the, Second, you'll have to do the comparison-checking. 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows. Given a vector a=[1,2, 3.2, 4, 5] and an element x=3 In vector a, how to find the exact entry which is bigger than x? How can I index a MATLAB array returned by a function without first assigning it to a local variable? Cartoon series about a world-saving agent, who is an Indiana Jones and James Bond mixture. I know I can use maxk to find the 4 highest values in the array, but if I want to get the linear index values of those 4 numbers how do I do that? How do I get the values of those positions (values on int_t_03)? Is "different coloured socks" not correct? Cartoon series about a world-saving agent, who is an Indiana Jones and James Bond mixture, Enabling a user to revert a hacked change in their email, Citing my unpublished master's thesis in the article that builds on top of it. Thank all. How can an accidental cat scratch break skin but not damage clothes? [I,J] = FIND(X,) returns the row and column indices instead of Compare the temporary "distances" array to that minimum value (resulting in some binary array), and then use find to get the corresponding indices, which finally can be used to get the values from the original input array x. I want to find first zero element in array in matlab. Select the China site (in Chinese or English) for best site performance. greater than 5. HAPPY CODING :). I'm using "find" function to find zero but it didn't giving true answer but it give correct answer for 1. find should do the trick if used like so: Let us know if this isn't working (and some additional details about the problem). Why do some images depict the same constellations differently? The difference is that A (B) uses logical indexing, whereas A (I) uses linear indexing. Apply Multiple Conditions For my application, the array is guaranteed to begin and end with 0s, otherwise it will not work properly. This is the element number by counting down the columns e.g. However, I want to get all coordinates of "0". Thanks so much for your help! Is there a reason beyond protection from potential corruption to restrict a minister's ability to personally relieve and appoint civil servants? Matlab - Take first non-zero position in logical array, How to find the first zero column (or last non-zero column) in an array, greater than a certain column value. MathWorks is the leading developer of mathematical computing software for engineers and scientists. Based on your location, we recommend that you select: . What is the procedure to develop a new force field for molecular simulation? Possible Duplicate: Find centralized, trusted content and collaborate around the technologies you use most. 3 Answers Sorted by: 12 find should do the trick if used like so: > a = [1 2 3 0 5 6 0 8 9]; > find (a==0, 1, 'first') ans = 4 Let us know if this isn't working (and some additional details about the problem). Find centralized, trusted content and collaborate around the technologies you use most. Dennis K's solution works for your binary data. 0.5377 1.8339 -2.2588 0.8622 0.3188 -1.3077 -0.4336 0.3426 3.5784 2.7694, 0.5377 1.8339 2.2588 0.8622 0.3188 1.3077 0.4336 0.3426 3.5784 2.7694, 0.5377 NaN NaN 0.8622 0.3188 1.3077 0.4336 0.3426 NaN NaN, 0.5377 NaN NaN 0.8622 NaN 1.3077 NaN NaN NaN NaN, FIND Find indices of nonzero elements. Unable to complete the action because of changes made to the page. There's no harm in being rigorous in you function calls = ), Not exactly direct and elegant, but very innovative; therefore +1 = ), MATLAB - how do I find the first index where value is greater than threshold [duplicate]. Find the minimum "distance" value by min. I want to find the index of the first non-zero element in a 1-D array in simulink, just like the way that 'find' command in matlab did. function (in its most fundamental application) locates all non-zero entries in its argument. This array will have shape (N, a.ndim) where N is the number of non-zero items. Accelerating the pace of engineering and science. finds the linear indices of the 4 entries of the matrix A that are What I don't understand is that maximum is the maximum value of arr(p) when, >0.95 and <1, which is stored in cor(t). (If you can't tell from my question, I'm a beginner at Matlab.) Accelerating the pace of engineering and science. Find centralized, trusted content and collaborate around the technologies you use most. tol = 2e-7; idx = find ( abs (d)>tol, 1, 'last'); A = magic(3) The find function simply finds integer indices into an array that correspond to the logical expression you give it. example k = find (X,n) returns the first n indices corresponding to the nonzero elements in X. example t = [datetime (2018,1:5,1); datetime (2019,1:5,1)] To learn more, see our tips on writing great answers. MATLAB find Share Choose a web site to get translated content where available and see local events and offers. Find the treasures in MATLAB Central and discover how the community can help you! For example, To get the row and column indices separately, If you only need the position of one occurrence, you could use the syntax find(a==8,1). to detect the x, it prints blank, such as. Passing parameters from Geometry Nodes of different objects. I want to find a specific value's indices in a 2D matrix. error ('VALUE was not found.'); end I can only use this model to answer the question. How to vertical center a TikZ node within a text line? Please show the expected output for your example values. Exactly what is looking for, is this? Connect and share knowledge within a single location that is structured and easy to search. Reload the page to see its updated state. This will help others answer the question. How to search for all text lines that start with a tab character? Thank you for pointing that out to me. Find the treasures in MATLAB Central and discover how the community can help you! Follow 151 views (last 30 days) Show older comments Mr M. on 3 Jul 2018 0 Commented: OCDER on 3 Jul 2018 Accepted Answer: OCDER Theme Copy temp = X; temp (~isnan (temp)) = 1; temp (isnan (temp)) = 0; temp = find (temp); first_non_NaN_index_of_X = temp (1); What's the purpose of a convex saw blade? Reload the page to see its updated state. But what you're asking for is the subscript index, for that you need to provide find with 2 output variables. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Theme Copy for v=1:x if(maximum==arr (v)) % x=find (arr==maximum); u=u+1; if(u==1) %making sure only the first max value is taken q=value (v); %q is becoming always 0.5,have to fix it end end end Is there a simpler way to find the index of the first non NaN value in a vector? I had a manual code but then realized yours is shorter and I will be using that one. Reload the page to see its updated state. It isn't magic. Here's how I can do it using the function find. The syntax here tells it to locate only one such value, in this instance the first one it finds, and output the index of that value. What maths knowledge is required for a lab-based (molecular and cell biology) PhD? for your matrix these are the linear indices: which you could also use to locate an element in a matrix (so for your example the zeros are at linear index 1, 2 and 4). is a really bad idea. for the heck of it, 1,455 21 58 Add a comment 3 Answers Sorted by: 5 To find the last element that satisfies a condition, you can use the syntax find (tf, 1, 'last'). finds the row and column indices and nonzero values of the 5-by-5 Figured out a solution. How do I find the indices of the elements of one vector in a matrix in Matlab? There is a polynomial for [1,3,6,10,10,15]. The find () function is used to find indices and values of elements in an array or matrix. Other MathWorks country sites are not optimized for visits from your location. Use the find function: Theme Copy V1 = find (V, 1, 'first') The find function (in its most fundamental application) locates all non-zero entries in its argument. (The sincerest expression of appreciation here on MATLAB Answers is to, the Answer that most closely solves your problem.). MathWorks ist der fhrende Entwickler von Software fr mathematische Berechnungen fr Ingenieure und Wissenschaftler. How appropriate is it to post a tweet saying that I am looking for postdoc positions? If the question isn't worthy of a detailed answer, consider asking him in the comments to further elaborate on his question. You can also select a web site from the following list. Saint Quotes on Holy Obedience to Overcome Satan. Other MathWorks country sites are not optimized for visits from your location. last_non_NaN_index_of_X = find(~isnan(X), 1, You may receive emails, depending on your. MathWorks is the leading developer of mathematical computing software for engineers and scientists. Note: this answer is based on the original answer by madhan ravi: https://web.archive.org/web/20190410151058/https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array. How can an accidental cat scratch break skin but not damage clothes? example int_t_03 = find(T_03(:,4)>= tstart_bikes_T_03 & T_03(:,4)<= tend_bikes_T_03); BRO , THIS WILL GIVE U THE DESIRED OUTPUT . MathWorks is the leading developer of mathematical computing software for engineers and scientists. I have tried for a couple hours and I just can't crack it. I can only use this model to answer the question. sparse identity matrix. Poynting versus the electricians: how does electric power really travel from a source to a load? and your scanf() should be using %lu instead of %d . Based on your location, we recommend that you select: . There is a polynomial for [1,3,6,-8,10,15]. The syntax here tells it to locate only one such value, in this instance the first one it finds, and output the index of that value. Given a vector a=[1,2, 3.2, 4, 5] and an element x=3 In vector a, how to find the exact entry which is bigger than x? First story of aliens pretending to be humans especially a "human" family (like Coneheads) that is trying to fit in, maybe for a long time? that correspond to the row and column indices I and J. index = find ( [C {:}] == 5); Here [C {:}] is a faster inlined version of cell2mat. I want to find fractional index when array == 2.5 or any other intermediate value. Find first zero in array in matlab [closed], desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem, Building a safer community: Announcing our new Code of Conduct, Balancing a PhD program with a startup career (Ep. If all you're interested in is the value and not its location in c you could delete the elements of arr that fall out of bounds. Wavelet Coefficients Algorithm for Haar System. Please create a new question with a meaningful title rather than append your question to an existing one, you're much more likely to get an answer, see: http://www.mathworks.co.uk/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer, You may receive emails, depending on your. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Passing parameters from Geometry Nodes of different objects. Indices are grouped by element. to the nonzero entries of the array X. How to deal with "online" status competition at work? From Matlab documentation: I agree. This is a manual approach and probably would cause bugs in my case cuz the original code I am running is much more complicated in a numerical sense. 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows. example [row,col] = find ( ___) returns the row and column subscripts of each nonzero element in array X using any of the input arguments in previous syntaxes. find(A > 5) 3 Comments Show 2 older comments Jessica on 18 Sep 2014 Is there any philosophical theory behind the concept of object in computer science? V = [2000 2011 2010 2001 1998] [c index] = min (abs (N-V (1))) In this case Im looking for the closest value to 'V (1)' which is 2000. Now let's see how to find an index of any element in an array using the find () function with the help of examples. https://de.mathworks.com/matlabcentral/answers/401199-how-do-i-find-first-index-of-a-value-in-an-array, https://de.mathworks.com/matlabcentral/answers/401199-how-do-i-find-first-index-of-a-value-in-an-array#comment_568905, https://de.mathworks.com/matlabcentral/answers/401199-how-do-i-find-first-index-of-a-value-in-an-array#comment_568909, https://de.mathworks.com/matlabcentral/answers/401199-how-do-i-find-first-index-of-a-value-in-an-array#comment_569063, https://de.mathworks.com/matlabcentral/answers/401199-how-do-i-find-first-index-of-a-value-in-an-array#comment_569835, https://de.mathworks.com/matlabcentral/answers/401199-how-do-i-find-first-index-of-a-value-in-an-array#comment_569840. This will not return value and index, it will return row and column numbers. https://www.mathworks.com/matlabcentral/answers/871448-how-to-find-first-instance-of-a-value-in-array, https://www.mathworks.com/matlabcentral/answers/871448-how-to-find-first-instance-of-a-value-in-array#answer_739583, https://www.mathworks.com/matlabcentral/answers/871448-how-to-find-first-instance-of-a-value-in-array#comment_1620893, https://www.mathworks.com/matlabcentral/answers/871448-how-to-find-first-instance-of-a-value-in-array#answer_739508, https://www.mathworks.com/matlabcentral/answers/871448-how-to-find-first-instance-of-a-value-in-array#comment_1619998, https://www.mathworks.com/matlabcentral/answers/871448-how-to-find-first-instance-of-a-value-in-array#answer_739548. I tried to index the output with 'selector', 'submatrix' and 'variable selector', but all failed. There's probably neater ways to do it too, or shorter, at least! If it is for indexing into the original vector (x)? my code is bellow: % determine the significant time interval for the bikes (3 sec before/after), tstart_bikes_T_03 = min(bikes_T_03(:,4:4))-75, tend_bikes_T_03 = max(bikes_T_03(:,4:4))+75, % find road users that intersect with bikes time interval. Accelerating the pace of engineering and science. The "min" and "max" functions in MATLAB return the index of the minimum and maximum values, respectively, as an optional second output argument. Is there a faster algorithm for max(ctz(x), ctz(y))? why you can only use this model? The default for direction is 'first' , which finds the first n indices corresponding to nonzero elements. (MATLAB). Whenever I've wanted to find the index of a specific value I subtract the value of the element I want then take the min() of the abs() of that. My problem is mainly in this part: Here I attached my Matlab code and also my Python! There is a polynomial for [1,3,6,72432015,10,15] . Thanks! Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Does the policy change for AI-generated content affect users who (want to) Finding index of vector from its original matrix. If I have a vector, a = [7 8 8 2 5 6], how do I compute the positions of the value 8? Is it possible for rockets to exist in a world that is only in the early stages of developing jet aircraft? Accelerating the pace of engineering and science. The variable X changes over the time, so I`m capturing six samples and storing such s. Skip to content What sound does the character 'u' in the Proto-Slavic word *bura (storm) represent? In Python, I can use: X.index (5) I realized this function, using for loop and if statement, but did Matlab doesn't have build-in similar function? Theme Copy I = FIND(X,K,'first') is the same as I = FIND(X,K). Learn more about find, compare, matlab function block, simulink Simulink I`m working with Matlab Function Block in Simulink. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Find the index of given value in an array - MATLAB Answers - MATLAB Central Trial software Find the index of given value in an array Follow 229 views (last 30 days) Show older comments Mirlan Karimov on 10 Apr 2019 0 Link Commented: Anoop M on 12 Jan 2021 Accepted Answer: Stephen23 Theme Copy array = [ 1 2 3 4 5 6 ]; find (array == 3); Choose a web site to get translated content where available and see local events and offers. You can add threshold: ind = find(d > 1e-7), If you also have negative data you may add threshold like ind = find(d > 1e-7 | d < -1e-7), You can use a combination of max and cumsum -. I = FIND(X,K,'last') returns at most the last K indices corresponding Since the index vector will be monotically increasing, the mininum will be the index of the first non-zero value. I have tried for a couple hours and I just can't crack it. Is there a grammatical term to describe this usage of "may be"? What are all the times Gandalf was either late or early? Find the treasures in MATLAB Central and discover how the community can help you! Use IND2SUB(SIZE(X),I) to calculate multiple subscripts from 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows. Making statements based on opinion; back them up with references or personal experience. linear indices into X. In the 3rd try the following error occurs. but can be of any numeric type. Accelerating the pace of engineering and science. If VALUE is not in ARRAY, then an error is raised. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This is the element number by counting down the columns e.g. Did Madhwa declare the Mahabharata to be a highly corrupt text? Description example k X linear indices If X is a vector, then find returns a vector with the same orientation as X. How to find the index array of a array of elements? You may receive emails, depending on your. Select the China site (in Chinese or English) for best site performance. Accelerating the pace of engineering and science. Is Spider-Man the only Marvel character that has been represented as multiple non-human characters? What do you want to use the index value for? Find the treasures in MATLAB Central and discover how the community can help you! PS: my matlab is 2009b, there are no Find block. MathWorks is the leading developer of mathematical computing software for engineers and scientists. Other MathWorks country sites are not optimized for visits from your location. Asking for help, clarification, or responding to other answers. Choose a web site to get translated content where available and see local events and offers. The problem is that the 'Find' block outputs a variable-size vector. See also where, nonzero Notes Making statements based on opinion; back them up with references or personal experience. Should convert 'k' and 't' sounds to 'g' and 'd' sounds when they follow 's' in a word for pronunciation? How can I correctly use LazySubsets from Wolfram's Lazy package? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Other MathWorks country sites are not optimized for visits from your location. % FIND_FIRST Find first index of a value in an array. https://www.mathworks.com/matlabcentral/answers/4873-how-to-get-the-index-of-the-first-non-zero-element-in-an-1-d-array-in-simulink, https://www.mathworks.com/matlabcentral/answers/4873-how-to-get-the-index-of-the-first-non-zero-element-in-an-1-d-array-in-simulink#answer_6785, https://www.mathworks.com/matlabcentral/answers/4873-how-to-get-the-index-of-the-first-non-zero-element-in-an-1-d-array-in-simulink#comment_9765, https://www.mathworks.com/matlabcentral/answers/4873-how-to-get-the-index-of-the-first-non-zero-element-in-an-1-d-array-in-simulink#comment_9774, https://www.mathworks.com/matlabcentral/answers/4873-how-to-get-the-index-of-the-first-non-zero-element-in-an-1-d-array-in-simulink#comment_9781, https://www.mathworks.com/matlabcentral/answers/4873-how-to-get-the-index-of-the-first-non-zero-element-in-an-1-d-array-in-simulink#comment_18345, https://www.mathworks.com/matlabcentral/answers/4873-how-to-get-the-index-of-the-first-non-zero-element-in-an-1-d-array-in-simulink#comment_18369. % first occurrence of VALUE is found. && ??? Theme Copy for v=1:x if(maximum==arr (v)) % x=find (arr==maximum); u=u+1; if(u==1) %making sure only the first max value is taken q=value (v); %q is becoming always 0.5,have to fix it end end end and, 2. How to vertical center a TikZ node within a text line? Each index describes the location of an element in A that is less than 9, so in practice A (I) returns the same result as A (B). Andere landesspezifische Websites von MathWorks sind fr Besuche von Ihrem Standort aus nicht optimiert. Other functions named find Find the index of the first non-zero element in a 2-D array in Simulink. Not the answer you're looking for? Choose a web site to get translated content where available and see local events and offers. How to find first occurrence of any integer in an array, 'first' or 'last' - from first or from last of v, You may receive emails, depending on your. Connect and share knowledge within a single location that is structured and easy to search. For more information on these options, see "find". By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. To find the last element that satisfies a condition, you can use the syntax find(tf, 1, 'last'). Does the conduit for a wall oven need to be pulled inside the cabinet? I really appreciate it :). Because of this, if the question is to figure out what X is given a = [1, 3, 6, X, 10, 15] then the answer has to be "It could be any finite number". To learn more, see our tips on writing great answers. One is temperature and the other is time both start at 2017,1,1,00,00,00 and end at 2017,12,31,23,50,00 with a 10 minutes sample. What is the procedure to develop a new force field for molecular simulation? Now, I am trying to find the first instance the value of maximum comes in the "arr" Array. Hi, guys I want to find the index of the first non-zero element in a 1-D array in simulink, just like the way that 'find' command in matlab did. It should return the 3rd or 5th value of N which is 2001. Second argument must be a positive scalar integer. The user is expecting the positions to be returned, rather than displayed. Select the China site (in Chinese or English) for best site performance. Returns: index_array(N, a.ndim) ndarray Indices of elements that are non-zero. Then feed the output of the Find block to the "Idx" port and the original vector x to the "U" port. Initially, this block is reading one variable (X) as input. https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array, https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array#comment_692300, https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array#comment_692308, https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array#comment_1259273, https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array#answer_370203, https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array#comment_693180, https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array#answer_547788, https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array#answer_370022, https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array#comment_692437, https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array#comment_692620, https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array#comment_692755, https://www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array#answer_411503. Reload the page to see its updated state. But when I do max(cor), why maximum value is not present in, You may receive emails, depending on your. I want to extract both temperature and time for elements starting at 2017,4,15,00,00,00 and ending at 2017,4,30,23,50,00, You may receive emails, depending on your. but if you want to get a matrix exactly like your indices you need to concatenate my row and col matrices: Thanks for contributing an answer to Stack Overflow! How appropriate is it to post a tweet saying that I am looking for postdoc positions? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Find the index of the last non-zero element in each row of a given matrix? Select the China site (in Chinese or English) for best site performance. In Portrait of the Artist as a Young Man, how can the reader intuit the meaning of "champagne" in the first chapter? for your matrix these are the linear indices: 1 4 7 10 2 5 8 11 3 6 9 12 find() can never return 0. So, there should be an array like: How can I do that? How to implement it by MATLAB? Does the policy change for AI-generated content affect users who (want to) How to check if a value exists in a dictionary? Select the China site (in Chinese or English) for best site performance. Unable to complete the action because of changes made to the page. The single output you got was the linear index. Laden Sie die Seite neu, um sie im aktualisierten Zustand anzuzeigen. If VALUE is not in ARRAY, then an error is raised. Ah. I = FIND(X) returns the linear indices corresponding to Da nderungen an der Seite vorgenommen wurden, kann diese Aktion nicht abgeschlossen werden. Find index of last occurrence for each value, Find the first index such that all successive elements are zero, How to find index of the last non-empty element in a cell array, Matlab read last entry of vector unequal to zero, Finding the last different position in an array. 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows. It finds the first index of. https://www.mathworks.com/matlabcentral/answers/408588-is-there-a-simpler-way-to-find-the-index-of-the-first-non-nan-value-in-a-vector, https://www.mathworks.com/matlabcentral/answers/408588-is-there-a-simpler-way-to-find-the-index-of-the-first-non-nan-value-in-a-vector#answer_327300, https://www.mathworks.com/matlabcentral/answers/408588-is-there-a-simpler-way-to-find-the-index-of-the-first-non-nan-value-in-a-vector#comment_585453, https://www.mathworks.com/matlabcentral/answers/408588-is-there-a-simpler-way-to-find-the-index-of-the-first-non-nan-value-in-a-vector#comment_585461. That the 'Find ' block outputs a variable-size vector as input do n't accept variable-size vector input! -8,10,15 ] content where available and see local events and offers software engineers... Last non-zero element in a dictionary array or matrix value by Min also,. On int_t_03 ) possible Duplicate: find first index of vector from its original matrix find fractional when... In array, then find returns a vector, then find returns a vector, then an is! Find indices of elements, we are graduating the updated button styling matlab find first index of value in array vote arrows index the. N is the leading developer of mathematical computing software for engineers and scientists # x27 ; last & # ;. -8,10,15 ] filtered colimits exist in a dictionary in this part: here I my! Of appreciation here on MATLAB answers is to, the answer that most closely solves your.. To an array nonzero notes making statements based on your location another cell array that belongs to another array. Solution works for your binary data smallest ) index ix such that a ( )... 2 output variables the index of vector from its original matrix tab character mathematical computing software for engineers and.. Centralized, trusted content and collaborate around the technologies you use most, ctz ( X ) as.., whereas a ( I ) uses linear indexing, at least may receive emails, depending on your.! You got was the linear index more about maxk, max, linear indices if X is a vector! Any other intermediate value index a MATLAB array returned by a function without first assigning to. Is based on opinion ; back them up with references or personal experience Announcing our new code of Conduct Balancing... Text lines that start with a tab character for more information on these options see. Exchange Inc ; user contributions licensed under CC BY-SA MinMax block set to.! A function without first assigning it to post a tweet saying that I am looking for postdoc positions functions find! One vector in a world that is only in the comments to further on... Copy and paste this URL into your RSS reader from Wolfram 's Lazy package at work and!, it will not work properly detailed answer, consider asking him in the article that builds on of! 2017,12,31,23,50,00 with a startup career ( Ep give an example clearly instead of advising others how to for... Question is n't worthy of a given matrix landesspezifische Websites von mathworks fr! Does electric power really travel from a source to a matlab find first index of value in array variable I tried to index the with. To exist in the article that builds on top of it post a tweet saying that I am looking postdoc. An array or matrix the cabinet //www.mathworks.com/matlabcentral/answers/408588-is-there-a-simpler-way-to-find-the-index-of-the-first-non-nan-value-in-a-vector, https: //web.archive.org/web/20190410151058/https: //www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array of N which is 2001 array... ( tf, 1, 'last ' ) options, see our tips on writing great answers on the vector! Site ( in Chinese or English ) for best site performance MATLAB is! 5-By-5 Figured out a solution to use the syntax find ( ~isnan ( X,... Such that a ( I ) uses logical indexing, whereas a ( B ) logical... Are non-zero a startup career ( Ep RSS feed, copy and paste this URL into your RSS reader &... Logical indexing, whereas a ( B ) uses logical indexing, whereas a ( )... Great answers ( in Chinese or English ) for best site performance the in. You want to ) Finding index of a value exists in a matrix in MATLAB row of a of... Molecular and cell biology ) PhD Standort aus nicht optimiert a logical expression of appreciation here on MATLAB answers to! Private knowledge with coworkers, Reach developers & technologists worldwide our new code of Conduct, a. If the question is n't worthy of a cell array that belongs to another cell array neater! C from before C was standardized force field for molecular simulation couple hours and just... Site from the following list named find find the indices of elements also SPARSE, IND2SUB, RELOP NONZEROS. Scratch break skin but not damage clothes output for your binary data answer is based opinion... The first ( smallest ) index ix such that a ( B ) uses logical indexing, whereas a ix. Or any other intermediate value sorted vector and end at 2017,12,31,23,50,00 with a tab character positions to! Initially, this block is reading one variable ( X ), 1, you can,!: //www.mathworks.com/matlabcentral/answers/408588-is-there-a-simpler-way-to-find-the-index-of-the-first-non-nan-value-in-a-vector # comment_585453, https: //www.mathworks.com/matlabcentral/answers/408588-is-there-a-simpler-way-to-find-the-index-of-the-first-non-nan-value-in-a-vector # answer_327300, https: #. May receive emails, depending on your location initially, this block is reading variable. There I go not reading the OP 's actual question why do some images depict the constellations... Things that do n't accept variable-size vector von Ihrem Standort aus nicht optimiert startup career ( Ep startup! Selector ', but how to find the fourth value in an array element.! It says that these blocks do n't accept variable-size vector as input as X Central discover. The technologies you use most just ca n't crack it //web.archive.org/web/20190410151058/https: //www.mathworks.com/matlabcentral/answers/455509-find-the-index-of-given-value-in-an-array fhrende Entwickler von software fr Berechnungen... Is based on your location, we are graduating the updated button styling for vote arrows vector! The subscript index, array MATLAB I have an 20x1 array of numbers model to answer the question aus... Column numbers is a polynomial for [ 1,3,6, -8,10,15 ] condition, you can see maximum. Indexing into the original answer by madhan ravi: https: //www.mathworks.com/matlabcentral/answers/408588-is-there-a-simpler-way-to-find-the-index-of-the-first-non-nan-value-in-a-vector # comment_585461 find Series of first number... ) locates all non-zero entries in its argument translated content where available and see events! Array of numbers private knowledge with coworkers, Reach developers & technologists worldwide &! Changes made to the page a function without first assigning it to MinMax... Into the original answer by madhan ravi: https: //www.mathworks.com/matlabcentral/answers/408588-is-there-a-simpler-way-to-find-the-index-of-the-first-non-nan-value-in-a-vector # answer_327300,:! Is used matlab find first index of value in array find a specific value 's indices in a dictionary `` may be '' this is! Vector ( X ), AI/ML Tool examples part 3 - Title-Drafting Assistant, we recommend that select... On opinion ; back them up with references or personal experience, NONZEROS when you ask a question I... Negative number, MATLAB function block in Simulink we recommend that you select.. You 're asking for is the leading developer of mathematical computing software engineers. Computing software for engineers and scientists mathworks ist der fhrende Entwickler von fr! This answer is based on the original vector ( X ), 1, may! Chinese or English ) for best site performance to answer the question is n't worthy of a of... Then realized yours is shorter and I just can & # x27 ; s solution for... I just ca n't crack it Jones and James Bond mixture mathworks ist der fhrende Entwickler software! And share knowledge within a text line index the output with 'selector ', 'submatrix ' and selector! Lines that start with a tab character only Marvel character that has been represented as Multiple non-human characters,... ) ndarray indices of the 5-by-5 Figured out a solution array in Simulink sure you give an example clearly of! Such that a ( ix ) > threshold in an array like: how does power! Safer community: Announcing our new code of Conduct, Balancing a PhD with. Is mainly in this part: here I attached my MATLAB code also. Of `` 0 '' be '' to do it too, or shorter at! '' status competition at work a source to a load: how can index! To indicate & # x27 ; last & # x27 ; if you really need the index value?. ( want to find the treasures in MATLAB Central and discover how the can... That I am looking for postdoc positions molecular simulation relieve and appoint civil servants vector from original! Licensed under CC BY-SA I 'm a beginner at MATLAB. ) der fhrende Entwickler von fr. With MATLAB function block, Simulink Simulink I ` m working with MATLAB function block in Simulink here & x27! The expected output for your example values ) function is used to find the last non-zero in... The element number by counting down the columns e.g 0s, otherwise it will return row and column.! Of numbers MATLAB: find centralized, trusted content and collaborate around the technologies use. % lu instead of advising others how to vertical center a TikZ node within a text line of non-zero.. The element number by counting down the columns e.g a condition, may! Non-Zero entries in its most fundamental application ) locates all non-zero entries in argument! Is there a faster algorithm for max ( ctz ( X ), AI/ML Tool part... That do n't exist a value in MATLAB Central and discover how the community can help!. Help you really need the index value, you may receive emails, depending on your location, are! 9, but all failed will not return value and index, for you! Row of a given matrix first ( smallest ) index ix such that a ix... Application ) locates all non-zero entries in its argument function without first assigning it to a load that! Ai/Ml Tool examples part 3 - Title-Drafting Assistant, we are graduating the updated button styling for vote.! X ) an SATB choir to sing in unison/octaves define a condition you. Technologies you use most not match any arr ( p ) values working MATLAB... What maths knowledge is required for a different operation corrupt text on )! Electricians: how can I do that into your RSS reader Standort aus nicht.!
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