Matlab sub2ind. what is the function of (sub2ind)...

Matlab sub2ind. what is the function of (sub2ind). , In containing the equivalent multidimensional array subscripts equivalent to IND for an array of size siz. MATLAB®의 backgroundPool을 사용해 백그라운드에서 코드를 실행하거나 Parallel Computing Toolbox™의 ThreadPool을 사용해 코드 실행 속도를 높일 수 있습니다. ) Matlab offers the function sub2ind which "returns the linear index equivalents to the row and column subscripts for a matrix . mathworks. The size vector `sz` defines the extents of the target array, and you must supply one subscript array per dimension. Previously, the subscript inputs were required to be the same size. Examples The mapping from linear indexes to subscript equivalents for a 2-by-2-by-2 array is: See Also sub2ind Single index from subscripts find Find indices and values of nonzero elements 在MATLAB中，sub2ind函数用于将矩阵的行列下标转换为对应的线性索引。这在需要直接访问矩阵中某个位置的元素时特别有用，避免了使用多维下标的复杂性。使用方法如下： 1. Hi all, I have a matrix with a dynamic size, e. The matrixSize input is a 2-element vector that specifies the number of rows and columns in the matrix as [nRows, nCols]. 此 MATLAB 函数针对大小为 sz 的矩阵返回由 row 和 col 指定的行列下标的对应线性索引 ind。此处，sz 是包含两个元素的向量，其中 sz(1) 指定行数，sz(2) 指定列数。 IND = SUB2IND (SIZ,M), where M is a R x N matrix, returns the N linear indices equivalent to the N subscripts of rank R in the columns of M for an array of size SIZ. M x N. It is combination of eval and sub2ind. siz is a 2-element vector, where siz(1) is the number of rows and siz(2) is the number of columns. Do you know how to convert the subscript matrix into a linear 本文详细介绍了MATLAB中sub2ind函数的使用方法，通过具体示例解释了如何将矩阵的行、列下标转换为线性索引，这对于理解和操作多维数组非常有用。 Converting between matrix subscripts and linear indices (like ind2sub/sub2ind in matlab)Let's say you have a matrix m <- matrix(1:25*2, nrow IND = sub2ind(siz,I1,I2,,In) returns the linear index equivalent to the n subscripts in the arrays I1, I2,, In for an array of size siz. CSDN问答为您找到matlab sub2ind相关问题答案，如果想了解更多关于matlab sub2ind matlab 技术问题等相关问答，请访问CSDN问答。 If I correctly interpret your edit, you want to create a variable result that contains the elements of RULES indicated by the non-zero elements of L. Feb 4, 2022 · 遇到了一个函数: sub2ind (Convert subscripts to linear indices，将下标转换为线性索引)教程是这样解释的"D=sub2ind (S,I,J)"，这里"S"是行数和列数组成的向量，"I"和"J"分别表示转换矩阵的行下标和列下标，并给了如图的例子 Feb 3, 2018 · Using sub2ind interprets this vector as the size of an array (an extremely huge array with 20^20 elements, but it is not created explicitly). jp sub (subscript): 行列要素(i,j)。人間にわかりやすい方。 ind (index): 行列要素を左上からタテに読んだラベル。人間にはわかりにくい方。 ind2sub 行列サイズ(N1,N2)とindexを指定する。 2-by-3行列でindex=3に I need to access several indices around a certain point in 3D. Now the "linear index" is determined for the element in the 20th row and 1st column. For neighb 本文详细介绍了MATLAB中sub2ind函数的使用方法，通过具体示例解释了如何将矩阵的行、列下标转换为线性索引，这对于理解和操作多维数组非常有用。 when using SUB2IND i must inform de x and y coordinates, but i want to convert all at the same time. Learn more about matlab, eval, antipattern, buggy, bad code, pointless, cargo cult programming, complicated 最近重新开始回顾matlab，找了个比较详细的教学视频(这次，不是为了应付考试，说是一时兴起也好，希望能坚持下去遇到了一个函数:sub2ind(Convert subscripts to linear indices，将下标转换为线性索引)教程是这样… 文章浏览阅读3. sub2ind can be avoided, I believe, with the following equivalence [here] `sub2ind (sz, s1, s2, )` converts row/column (or higher-dimensional) subscripts into MATLAB's column-major linear indexing form. The sub2ind (R2024a) function now supports scalar expansion and accepts a mix of scalars and vectors for subscript inputs. The sub2ind command determines the equivalent single index corresponding to a set of subscript values. Strangely enough I could not find a general answer for this simple question. hatenablog. . Note that in general, the best way to vectorize sub2ind is to not use sub2ind. IND = SUB2IND (SIZ,M), where M is a R x N matrix, returns the N linear indices equivalent to the N subscripts of rank R in the columns of M for an array of size SIZ. 文章浏览阅读2. Could anybody explain to me with this problem. siz is a 2-element vector, where siz (1) is the number of rows and siz (2) is the number of columns. 8k次。本文详细介绍了MATLAB中sub2ind函数的用法，通过实例演示了如何将多维数组的下标转换为对应的线性索引，并解析了常见的错误案例。 Description The sub2ind command determines the equivalent single index corresponding to a set of subscript values. com/help/matlab/ref/sub2ind. Error using sub2ind: out of range subscript. This MATLAB function returns the arrays row and col containing the equivalent row and column subscripts corresponding to the linear indices ind for a matrix of size sz. i can use function FIND which returns two vectors x and y and this way i can use SUB2IND succesfully, but FIND only returns the x and y coordinates of nonzero elements. g. For example, sub2ind(sz, [1 2 3],2) is now the same as sub2ind(sz, [1 2 3], [2 2 2]). For example: Mar 4, 2025 · The sub2ind (R2024a) function now supports scalar expansion and accepts a mix of scalars and vectors for subscript inputs. The one linked answer here is not general. In Matlab the functions you would use for converting matrix subscripts to linear indices and vice versa are ind2sub and `sub2ind Is there an equivalent way in R? Hi all, I have a matrix with a dynamic size, e. Do you know how to convert the subscript matrix into a linear Do not use sub2ind () to try to expand a matrix (though you can get away with it by lying about the size of the current last dimension, providing you are expanding on the last dimension. この MATLAB 関数は、サイズ sz の行列について、線形インデックス ind に対応する等価の行と列の添字を含む配列 row と配列 col を返します。 Are there any functions in OpenCV which are equal to MATLAB's sub2ind and ind2sub functions? I need both functions for my C++ app. Each row of the matrix indicates subscripts of an element in a N-D matrix. How to get the final answer = 381? Than MATLABのsub2indとind2sub MATLABと同じ。 sub2indとind2subは廃止になりました！以下参照。 julia. If OpenCV lacks of these functions, are there any C++ libs which p Description The sub2ind command determines the equivalent single index corresponding to a set of subscript values. " I need this sub2ind function or something similar, but I did not find any similar Python or Numpy function. Examples The mapping from subscripts to linear index equivalents for a 2-by-2-by-2 array is: See Also ind2sub Subscripts from linear index find Find indices and values of nonzero elements This MATLAB function returns the linear indices ind corresponding to the row and column subscripts in row and col for a matrix of size sz. It not only works but also outputs non-integer values. For example, for point (x1,y1,z1) I need to get all the indices of its 3x3x3 neighborhood such that (x1,y1,z1) is centered. 1419，对应的序号为 IND = sub2ind(siz,I1,I2,,In) returns the linear index equivalent to the n subscripts in the arrays I1, I2,, In for an array of size siz. IND = sub2ind (siz,I,J) returns the linear index equivalent to the row and column subscripts I and J for a matrix of size siz. Esta función de MATLAB devuelve los índices lineales ind correspondientes a los subíndices de fila y columna de row y col para una matriz de tamaño sz. This MATLAB function returns the linear indices ind corresponding to the row and column subscripts in row and col for a matrix of size sz. In Matlab, a multidimensional array is stored in a contiguous block of memory, so it's efficient, and you can index in to it using either multidimensional subscripts or linear indexing. I looked at the documentation but didn't see an explanation for this behavior. GPU 배열 Parallel Computing Toolbox™를 사용해 GPU (그래픽스 처리 장치)에서 실행하여 코드 실행 속도를 높일 수 있습니다. Are there any functions in OpenCV which are equal to MATLAB's sub2ind and ind2sub functions? I need both functions for my C++ app. ) IND = SUB2IND (SIZ,M), where M is a R x N matrix, returns the N linear indices equivalent to the N subscripts of rank R in the columns of M for an array of size SIZ. Learn more about gui, axes MATLAB Do not use sub2ind () to try to expand a matrix (though you can get away with it by lying about the size of the current last dimension, providing you are expanding on the last dimension. This MATLAB function returns the linear indices ind corresponding to the row and column subscripts in row and col for a matrix of size sz. Learn more about gui, axes MATLAB sub2ind(matrixSize, rowSub, colSub) returns the linear index equivalents to the row and column subscripts rowSub and colSub for a matrix of size matrixSize. html 添字から線形インデックスへの変換 - MATLAB sub2ind - MathWorks 日本 ind = sub2ind(sz, row, col 文章浏览阅读4. Jul 21, 2025 · I was working with some displacement matrices and noticed sub2ind working with non-integer inputs. Examples The mapping from subscripts to linear index equivalents for a 2-by-2-by-2 array is: See Also ind2sub Subscripts from linear index find Find indices and values of nonzero elements 文章浏览阅读5w次，点赞15次，收藏29次。刚刚开始学习matlab函数学到sub2ind函数 A= [17 24 1 8;2 22 7 14;4 6 13 20]A = 17 24 1 8 2 22 7 14 4 6 13_sub2ind函数matlab matlab-sub2ind（）和ind2sub（），矩阵的索引转换，sub2ind（）是双下标索引值转换为单下标索引值，ind2sub（）则相反。具体是什么意思呢。通过下面程序来看：首先我们构造了一个矩阵，然后应用sub2ind（）函数进行转换，例子中是，第二行第三列转换为单下标索引，结果为8，现在还摸不着头脑，再看 sub2ind サブスクリプトからインデックスへの変換表示 IND = sub2ind(siz,I,J) IND = sub2ind(siz,I1,I2,,In) 詳細コマンド sub2ind は、サブスクリプトの値に対応する等価な単一のインデックスを決定します。 IND = sub2ind(siz,I,J) は、サイズ siz の行列に対して、配列 I と J で指定される行と列のサブスクリプト returns n subscript arrays I1, I2,. **函数定义**： ```matlab matlab 复习资料回馈社会的命令为 sub2ind，将单下标转换为全下标的命令为 ind2sub。 MATLAB 预定义ans表示最近运算的结果；、eps表示浮点数相对精度、nargin表示函数输入总量数目。 A=. Description The sub2ind command determines the equivalent single index corresponding to a set of subscript values. IND = sub2ind(siz,I,J) returns the linear index equivalent to the row and column subscripts I and J for a matrix of size siz. MATLAB sub2ind函数的使用，代码先锋网，一个为软件开发程序员提供代码片段和技术文章聚合的网站。 Hi, I come through this code and i couldn't understand how it works. 4w次，点赞67次，收藏80次。本文介绍了MATLAB中的sub2ind函数，该函数用于将矩阵的子脚本坐标转换为对应的线性索引。通过示例展示了如何使用此函数获取特定元素的位置，并提供了从矩阵中提取指定位置元素值的方法。此 MATLAB 函数针对大小为 sz 的矩阵返回由 row 和 col 指定的行列下标的对应线性索引 ind。此处，sz 是包含两个元素的向量，其中 sz(1) 指定行数，sz(2) 指定列数。本文详细介绍了Matlab中的`sub2ind`函数，包括其基本用法和注意事项，帮助读者更好地理解和运用这一函数进行多维数组的索引 sub2ind函数举例：上图中，首先创建了一个矩阵A，一个5行5列矩阵，size (A)为获得A矩阵的行数和列数，sub2ind第二和第三个参数都是用矩阵表示的，两个矩阵对应的元素代表A中某个元素的行下标和列下标。行下标为1，列下标为4的元素对应的是0. If OpenCV lacks of these functions, are there any C++ libs which p https://jp. 4k次。本文介绍了MATLAB中的sub2ind函数，它可将多维数组的子脚标转换为线性索引，方便访问多维数组元素。文中给出了该函数的语法、说明及使用示例，还提及与之对应的将线性索引转换为子脚标的函数，同样给出了使用示例。 Error using sub2ind: out of range subscript. zqypf, kh9cvu, 00dyq, kgztd, tuqb7m, 0nq9n, sghml, 7knj, nutv, kihs,