Ind2sub

JavaScript library to unravel a linear index into subscripts that ind2sub into a multi-dimensional array of a given size Julia and Matlab people know what's what. Convert ind2sub linear indexind2sub, ind2sub, and an array of sizesto an array of subscripts that index into a multi-dimensional welcome gifs of size sizes in the Fortran column-major convention first index varies fastest.

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Ind2sub

Help Center Help Center. Here sz is a vector with two elements, where sz 1 specifies the number of rows and sz 2 specifies the number of columns. Here sz is a vector with n elements that specifies the size of each array dimension. Convert the linear indices [3 4 5 6] to row and column subscripts in a 3-by-3 matrix. The mapping from linear indices to subscripts indexing by position is illustrated in the following. Convert the linear indices [3 4 5 6] to subscripts in a 2-byby-2 array. The mapping from linear indices to subscripts indexing by position for a 2-byby-2 array can be illustrated as in the following. When using ind2sub for an N-dimensional array, you would typically supply N output arguments for each dimension of the matrix. This example shows the different results when you return fewer output arguments for a 3-dimensional array. Create the input arguments needed to convert the linear indices 1 through 8 for a 3-dimensional array with size 2-byby Specify three output arguments when using ind2sub to return the row, column, and page subscripts for the 2-byby-2 array. If you specify only two output arguments, ind2sub ignores the third dimension of the array and returns subscripts for a 2-dimensional array with size 2-by-4 instead.

Data Types: double. This ind2sub fully supports thread-based environments.

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Matlab supports 3 forms of indexing matrices. There is the familiar range indexing that selects a submatrix within a larger matrix:. These two methods are fairly expressive, yet there are a certain number of operations which are awkward or impossible to perform with these. You might think this requires the use of a loop or some special function within Matlab. Yet this operation is easily done in a single step with linear indexing.

Ind2sub

Help Center Help Center. Here sz is a vector with two elements, where sz 1 specifies the number of rows and sz 2 specifies the number of columns. Here sz is a vector with n elements that specifies the size of each array dimension. Convert the linear indices [3 4 5 6] to row and column subscripts in a 3-by-3 matrix. The mapping from linear indices to subscripts indexing by position is illustrated in the following. Convert the linear indices [3 4 5 6] to subscripts in a 2-byby-2 array. The mapping from linear indices to subscripts indexing by position for a 2-byby-2 array can be illustrated as in the following. When using ind2sub for an N-dimensional array, you would typically supply N output arguments for each dimension of the matrix. This example shows the different results when you return fewer output arguments for a 3-dimensional array.

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More Answers 0. For example, [2 3 4] defines a 2-byby-4 array. Given just the N -element sizes array from above, this returns another function, which takes one index argument, that in turn yields the final N -element subscripts array. What is ind2sub. Sign in to answer this question. Based on your location, we recommend that you select:. Tags matlab. Accepted Answer. Column subscripts, returned as a scalar, vector, matrix, or multidimensional array. This function fully supports distributed arrays. Here sz is a vector with n elements that specifies the size of each array dimension. Varun Nair on 20 Jul Reload to refresh your session. An Error Occurred Unable to complete the action because of changes made to the page. You signed in with another tab or window.

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Search MathWorks. Select a Web Site Choose a web site to get translated content where available and see local events and offers. Size of array, specified as a vector of positive integers. Unlicense license. JavaScript library to unravel a linear index into subscripts that index into a multi-dimensional array of a given size Julia and Matlab people know what's what License Unlicense license. Dismiss alert. This means that the second subscript increments only after iterating through 2-tuples in the linear array: the second subscript is:. Extended Capabilities Tall Arrays Calculate with arrays that have more rows than fit in memory. MathWorks Answers Support. Toggle Main Navigation. Show older comments. A loop over large sizes that uses the optimized function might be 10x faster than the equivalent loop with plain ind2sub calls. You may receive emails, depending on your communication preferences.