Find in matlab

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The find function in MATLAB is used to find the indices and values of non-zero elements or the elements which satisfy a given condition. The relational expression can be used in conjunction with find to find the indices of elements that meet the given condition. It returns a vector that contains the linear indices. Using liner index a multidimensional array can be accessed using a single subscript. MATLAB treats the array as a single column vector with each column appended to the bottom of the previous column. Note: k will be of same orientation as X if X is a vector and if X is a multidimensional array then k will be a column vector which will hold linear indices. Example 1: Below code will return the indices of non-zero elements in a 1-D array.

Find in matlab

Help Center Help Center. This example shows how to filter the elements of an array by applying conditions to the array. For instance, you can examine the even elements in a matrix, find the location of all 0s in a multidimensional array, or replace NaN values in data. You can perform these tasks using a combination of the relational and logical operators. To apply a single condition, start by creating a 5-by-5 matrix that contains random integers between 1 and Reset the random number generator to the default state for reproducibility. Store the result in B. The result is a logical matrix. For example, A 1,1 is 13 , so B 1,1 is logical 0 false. However, A 1,2 is 2 , so B 1,2 is logical 1 true. Rather than comparing the two matrices element by element, you can use B to index into A. The result is a column vector of the elements in A that are less than 9. Since B is a logical matrix, this operation is called logical indexing.

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You can use indexing to access the elements of the array. To find the index of the element in the array, you can use the find function. Using the find function you can find the indices and the element from the array. The find function returns a vector containing the data. Note: If the array contains duplicates then find X function will return all the indices of that integer. When the array contains duplicate values the find function will print all the indices of that corresponding element. You can also find the index of the elements from both directions in the array.

MATLAB, a powerful numerical computing environment, offers a plethora of functions to manipulate, analyze, and visualize data. Among these functions, the find function stands out as a versatile tool for locating the indices of non-zero elements within arrays and matrices. It is a versatile function that can be applied to vectors, matrices, and multidimensional arrays. For vectors, a column vector indices is returned, containing the indices of non-zero elements. For matrices, two vectors, i and j , can be returned, representing row and column indices, respectively. In this example, we have a vector [1, 2, 0, 4, 0, 6]. The find function is applied to identify the indices of non-zero elements, which are then displayed. The function efficiently filters out zeros, and the resulting indices vector contains the positions of non-zero elements. In this example, the vector [1, 2, 0, 4, 0, 6] is given.

Find in matlab

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If the input is a variable-length row vector, then the size of an empty output is 1-by Improved By :. Hire With Us. Example 4: Below code will return indices of all the zero elements. Finally, find the elements in A that are less than 9 and even numbered and not equal to 2. Usage notes and limitations: If a variable-size input becomes a row vector at run time, then code generation ends with an error. The resulting matrix has values of logical 1 true in place of the NaN values, and logical 0 false in place of the 10s. Report issue Report. The linear index changes depending on the size of the array; A 5 returns a differently located element for a 3-by-3 matrix than it does for a 4-by-4 matrix. Some problems require information about the locations of the array elements that meet a condition rather than their actual values. Replace all values in A that are greater than 10 with the number Thank you for your valuable feedback!

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Off-Canvas Navigation Menu Toggle. Trending in News. Other MathWorks country sites are not optimized for visits from your location. You can return the nonzero values in X using X k. Admission Experiences. Toggle Main Navigation. Improved By :. Otherwise, k is a column vector. Improve Improve. Save Article. Help us improve. Explore offer now. This will find all indices of all non-zero elements present in the array and store them into the vector v. Note: If the array contains duplicates then find X function will return all the indices of that integer. It is the only element in A that satisfies all three conditions.