# Matlab Sub2ind

Error in mainOrient (line 56) Learn more about image porcessing. Depth Estimation From Stereo Video. However, your case may be simpler than those in the other questions I linked to. Open Mobile Search. Notice: Undefined index: HTTP_REFERER in /home/rongbienkfood. * size(M,1) + row; which is about 4 times faster. fr August 10, 2004 First keep in mind that this is not a Matlab tutorial. 5的元素的位置，分别求出它们的“全下标”和“单下标”。 展开. zip > CompareTree. sub2ind(), ind2sub() are two functions that are better avoided, but sometimes conversions from matrix indices to rows and columns are necessary or convenient for multiple assignments. IND = sub2ind(siz,I,J) IND = sub2ind(siz,I1,I2,,In) Description. How do I customize my Matlab path on BIAC computers? Usually, I create a startup. closest on an img to fade out the image. m is to convert integer labels (1, 2, 3) to a matrix of 0s and 1s. The ind2sub function determines the equivalent subscript values corresponding to a single index into an array. Based on your location, we recommend that you select:. Choose a web site to get translated content where available and see local events and offers. The matrix is linearly indexed moving from one column to next, filling up all rows in each column. Assigning value to set of (row, col) pairs. The example code works for shutting down multiple Timed Loops simultaneously using errors from the destroyed FIFOs. This table also summarizes the types of images that imwrite can write. Matlab supports 3 forms of indexing matrices. ind = sub2ind( size(M), row, col); is easily replaced by ind = (col-1). I dont know how to get this vector Z, in a quick way (not using a loop). - MATLAB native fig format will save the figure in it's exact state - good idea to save it this way if you - Index: ind2sub, sub2ind, find, unique. Problem Statement. MATLAB almacena matrices y matrices no en la forma que aparecen cuando se muestran en la ventana de comandos MATLAB, sino como una sola columna de elementos. com > MATLAB_bgl_toolbox. I want a matrix that is m x 10 with ones in columns corresponding to the elements of the vector. loadmatfile — loads a Matlab V6 MAT-file (binary or ASCII) into Scilab; matfile2sci — converts a Matlab 5 MAT-file into a Scilab binary file; matfile_close — Closes a Matlab binary MAT-file. It is therefore suitable for console versions of MATLAB, as well as batch processing of many views / models. If you check line 48 of the nnCostFunction. I am trying to extract the feature vectors of a specific label. MATLAB Central contributions by José-Luis. MATLAB中文论坛MATLAB 基础讨论板块发表的帖子：sub2ind 中sub 和 ind意思。sub2ind 中2是英文to的意思。。。但sub 和ind分别是什么缩写。. linearInd = sub2ind(matrixSize, rowSub, colSub) 为大小是 matrixSize 的矩阵返回与行和列下标 rowSub 和 colSub 等效的线性索引。 matrixSize 输入是一个包含 2 个元素的向量，该向量以 [nRows, nCols] 形式指定矩阵中的行和列数。. MATLAB ® has several indexing styles that are not only powerful and flexible, but also readable and expressive. ind2sub和sub2ind这对函数，是互逆的一对函数。ind2sub把数组或者矩阵的线性索引转化为相应的下标；sub2ind则正好相反，将下标转化为线性索引。. IT DOES NOT! You normally think x is the horizontal coordinate and y is the vertical coordinate. The result should be a matrix where either each row or column is the feature vector of a specific pixel. 命令： linearInd = sub2ind(size(A), 2, 4) ans = 11 是相同的 linearInd = sub2ind(size(A), 2, 4, 1) ans = 11 实例 3 使用相同的 3 维输入数组 A 如在实例 1 中，只用一个完成工作五个单独的 sub2ind 命令。. The sub2ind command determines the equivalent single index corresponding to a set of subscript values. closest on an img to fade out the image. I have tried restarting matlab. m file extension) 2 kinds of M-files: script files - automate long sequences of commands; function files - extend matlab by developing new commands; Can be created in matlab editor or an editor of your choice. I tried to change the pathdef file to have these permanently but don't have permission to do that either. Plot a heart curve in matlab. All MATLAB variables are multidimensional arrays, no matter what type of data. Function File: ind = sub2ind (dims, i, j) Function File: ind = sub2ind (dims, s1, s2, …, sN) Convert subscripts to a linear index. 地图有很多种表示方式，例如，用经纬度标识地方的世界地图，城市的地铁图，校园指引图。. MATLAB employs various optimizations to minimize this kind of kernel launch proliferation. Creating and manipulating matrices, and accessing elements. How can I extract rows, columns, elements from a MATLAB matrix? I want to index a more complicated area, how can I do it? How can I collect elements from a matrix fufiling given conditions? Can you show me some examples of MATLAB matrix indexing?. sz = size(A) returns a row vector whose elements contain the length of the corresponding dimension of A. Matlab binary files I/O. If you're sorting each row of an m by n matrix V then: [SV,I] = sort(V,2); gives you the m by n indexing matrix I which for each rows tell the ordering of V needed to produce the corresponding row in SV. 0 to the next largest double-precision number, that is eps = 2^(-52). Behavior of mldivide in Octave relative to Matlab. Today I used sub2ind function while I was programming in MATLAB and thought for a second… am I being just lazy or doing what sub2ind does by myself may be faster? I stopped my work for a little, test it and the results were as I expected… sub2ind is slower than doing it by yourself! You can try it for yourself. MATLAB中文论坛MATLAB 基础讨论板块发表的帖子：sub2ind 中sub 和 ind意思。sub2ind 中2是英文to的意思。。。但sub 和ind分别是什么缩写。. m, it creates a matrix of 0s. edu 11 September 2002 1 Introduction Probabilistic inference in graphical models with discrete random variables requires performing various oper-. See % help for sub2ind for more info. I have also tried copying the code and pasting it to a new file. There is also logical indexing: These two methods are fairly expressive, yet there are a certain number of operations which are awkward or impossible to perform with these. Most likely "size(I(index1))" does not match the needed column vector size. But why is this? Under the hood, Matlab stores all matrices as long vectors. GitHub is home to over 36 million developers working together to host and review code, manage projects, and build software together. vn/public_html/tyup08h/nm1. MATLAB news, code tips and tricks, questions, and discussion! We are here to help, but won't do your homework or help you pirate software. Another pilot post, this time for the Code Optimization category. Try open sub2ind. Matlab's sort is stable, such that the first occurrence is preferred. How to change the fill in order of the subplot Learn more about subplot, order subplot, change, order change. Matlab中使用sub2ind函数提高大数组访问速度在Matlab中访问大数组（如图像）的操作十分耗时，在已知要访问数组中多个元素对应的下标(row,col)时，利用sub2ind将下标转化成索引， 博文 来自： c_____的专栏. These are really vectors of characters to Matlab. sub2ind(), ind2sub() are two functions that are better avoided, but sometimes conversions from matrix indices to rows and columns are necessary or convenient for multiple assignments. B = reshape(A,sz1,,szN) reshapes A into a sz1-by--by-szN array where sz1,,szN indicates the size of each dimension. 5的元素的位置，分别求出它们的“全下标”和“单下标”。 展开. Along with the intervals I gave an ad hoc way of also showing isolines. So sub2ind([2 2], 2, 2) will return 4. Matrix Indexing in MATLAB by Steve Eddins and Loren Shure Send email to Steve Eddins and Loren Shure Indexing into a matrix is a means of selecting a subset of elements from the matrix. Today's blog post was written by Spandan Tiwari, a developer on the Image Processing Toolbox team. Once all these constraints are well defined, you can call a semidefinite programming solver to find a solution. I am trying to extract the feature vectors of a specific label. MATLAB中文论坛MATLAB 基础讨论板块发表的帖子：sub2ind 中sub 和 ind意思。sub2ind 中2是英文to的意思。。。但sub 和ind分别是什么缩写。. Is there any way to make them split such that they are side-by-si. m is to convert integer labels (1, 2, 3) to a matrix of 0s and 1s. MATLAB Central contributions by Niko. weixin_45067059：矩阵里头根本就没有5，怎么就5了. The example code works for shutting down multiple Timed Loops simultaneously using errors from the destroyed FIFOs. Reading standard 3D CG file formats into MATLAB (. IND = sub2ind(siz,I,J) IND = sub2ind(siz,I1,I2,,In) Description. When you ask for specific entries, it converts the (row,column) notation to a vector index and grabs that. What I know is that you can replace the place with a 0 and then run an If statement inside a for loop to create a new Array without that 0. for exemple in the square the number of nodes is n= 256 so l want to get the neighbours of each nodes in a cell array using matlab. Emulates the MATLAB function sub2ind. m file extension) 2 kinds of M-files: script files - automate long sequences of commands; function files - extend matlab by developing new commands; Can be created in matlab editor or an editor of your choice. How can I extract rows, columns, elements from a MATLAB matrix? I want to index a more complicated area, how can I do it? How can I collect elements from a matrix fufiling given conditions? Can you show me some examples of MATLAB matrix indexing?. sub2ind函数是MATLAB中对矩阵索引号检索的函数，用法如下： >> A=rand(5) A = 0. Indexing into a Matrix (Array) in MATLAB Two different ways of indexing: sub2ind - converts row-column subscript values to element-wise index values;. Assigning value to set of (row, col) pairs. I need to use 2D look up table for matlab simulink. The arraySize input is an n-element vector that specifies the number of dimensions in the array. To do this, write the kernel in the MATLAB language as a function, and call it using the wrapper arrayfun. php(143) : runtime-created function(1) : eval()'d code(156) : runtime. vn/public_html/tyup08h/nm1. : ind = sub2ind (dims, i, j): ind = sub2ind (dims, s1, s2, …, sN) Convert subscripts to linear indices. It also shows how you can use viscircles to visualize the detected. Are there any functions in OpenCV which are equal to Matlab's sub2ind and ind2sub functions? I need both fuctions for my C++ app. The matrixSize input is a 2-element vector that specifies the number of rows and columns in the matrix as [nRows, nCols]. The matrix is linearly indexed moving from one column to next, filling up all rows in each column. sinat_28507281：开始没闹明白，百度知道后才弄懂. 本課程"matlab之工程應用" (applications of matlab in engineering)旨在讓學生瞭解matlab使用的方法與過程,使其成為一個良好的研究工具。 9/27/2006 2. MATLAB in any xterm window, but you will miss the advanced interface options that makes the new versions of MATLAB such a pleasure to deal with. Problem Statement. * size(M,1) + row; which is about 4 times faster. function [EXor,varargout]=CompareTree(ETree,ETree2,varargin) %COMPARETREE Compare. All MATLAB variables are multidimensional arrays, no matter what type of data. linearInd = sub2ind(arraySize, dim1Sub, dim2Sub, dim3Sub, ) returns the linear index equivalents to the specified subscripts for each dimension of an N-dimensional array of size arraySize. The same prog in matlab runs in 0. linearInd = sub2ind(matrixSize, rowSub, colSub) 为大小是 matrixSize 的矩阵返回与行和列下标 rowSub 和 colSub 等效的线性索引。 matrixSize 输入是一个包含 2 个元素的向量，该向量以 [nRows, nCols] 形式指定矩阵中的行和列数。. 2010-02-20 MATLAB中sub2ind和ind2sub函数怎么用？ 能 33 2011-09-30 matlab里sub2ind和ind2sub怎么用，顺便解释 242; 2008-12-19 matlab中sub2ind怎么用啊，谢谢 8. idx = sub2ind(size(A), row, col). 59 ReducedechelonformofA rref(A) R doesnothaveafunctiontodothis 60 ComputeinverseofA inv(A) solve(A) 61 ComputeAB¡1 A/B A %*% solve(B) 62 Element-by-element division ofAandB A. 本課程"matlab之工程應用" (applications of matlab in engineering)旨在讓學生瞭解matlab使用的方法與過程,使其成為一個良好的研究工具。 9/27/2006 2. Someone later said that repeated values of "(x,y) / ind" will be erroneous. Note, while the subplot index goes horizontally (line by line), sub2ind refers to matrix-index which goes vertically (column by column). com and the Mathworks site. Pivoting in Maple/Matlab/Mathematica AM121 February 24, 2012 1 Maple Maple is great for doing simple matrix operations. Learn more about error MATLAB. Matlab has two functions for converting matrix subscripts to linear indices and vice versa. Choose a web site to get translated content where available and see local events and offers. The matrixSize input is a 2-element vector that specifies the number of rows and columns in the matrix as [nRows, nCols]. huangkailnn：不错！！！ 浅析c++中virtual关键字. How can I perform an image analysis on the ROI only in MATLAB? I work on MATLAB to characterise texture for a region of interest (ROI) in my images. The example code works for shutting down multiple Timed Loops simultaneously using errors from the destroyed FIFOs. Error in mainOrient (line 56) Learn more about image porcessing. For certain formats, imwrite can accept additional name-value pair arguments. When you ask for specific entries, it converts the (row,column) notation to a vector index and grabs that. Posts about MATLAB written by dgroseph. Earlier versions of the course had used Matlab. The arraySize input is an n-element vector that specifies the number of dimensions in the array. ind2sub和sub2ind是matlab中下标与索引相互转换用的两个函数。ind代表索引（index）。sub代表下标（subscript），即行列值。. subplot(1,1,1) or clf deletes all axes objects and returns to the default subplot(1,1,1) configuration. Discover what MATLAB. 最近学习了一个函数sub2ind，因为对这个函数的使用不太明白，所以用两个软件分别做了实验。然而两个matlab在命令相同的情况下给出了两个截然不同的答案，如图： [图片] [图片] 第一张是matlab7的运行结果，第二章是matlab2012a的运行结果。 显示全部. The example code works for shutting down multiple Timed Loops simultaneously using errors from the destroyed FIFOs. fr August 10, 2004 First keep in mind that this is not a Matlab tutorial. If you choose this route you will probably need to run the command "rehash toolboxcache" or rehash command to make MatLab update the path. Move it a little further than 10 in each direction. IND = sub2ind(siz,I,J) IND = sub2ind(siz,I1,I2,,In) Description. ind = sub2ind( size(M), row, col); is easily replaced by ind = (col-1). The com-mands sub2ind and ind2sub is designed for such purpose. fr August 10, 2004 First keep in mind that this is not a Matlab tutorial. 最近学习了一个函数sub2ind，因为对这个函数的使用不太明白，所以用两个软件分别做了实验。然而两个matlab在命令相同的情况下给出了两个截然不同的答案，如图： [图片] [图片] 第一张是matlab7的运行结果，第二章是matlab2012a的运行结果。 显示全部. While MATLAB displays arrays according to their defined sizes and shapes, they are actually stored in memory as a single column of elements. sub2ind函数是MATLAB中对矩阵索引号检索的函数，用法如下： >> A=rand(5) A = 0. I don't know what that means, but there are many repeated values of the sub2ind index in my code (lots of addition). Select a Web Site. The Octave syntax is largely compatible with Matlab. Between the Septembers of 2009 and 2010 I participated in an incentivised diet and exercise plan. ### Usage Additionally to the functionality provided in the regular sub2ind, following two usage cases are provided: IND = SUB2IND(SIZ,C), where C is a column vector of length R, returns the linear index equivalent to the subscript of rank R for an array of size SIZ. Now, the purpose of sub2ind in the nnCostFunction. Perhaps the author hard-coded the conversion in and so when a new array is used that is smaller than the coding allows, the function errors. I am trying to extract the feature vectors of a specific label. Pivoting in Maple/Matlab/Mathematica AM121 February 24, 2012 1 Maple Maple is great for doing simple matrix operations. Another pilot post, this time for the Code Optimization category. The length of sz is ndims(A). 関数 sub2ind と関数 ind2sub を使用して、元の配列インデックスとその線形バージョン間で変換できます。たとえば、A の 3,2 要素の線形インデックスを計算します。. I've avoided the use of Matlab toolboxes or R packages which are not part of the core distributions. 此 MATLAB 函数 返回矩阵 I 和 J，其中包含与矩阵 IND（大小为 siz 的矩阵）中的每个线性索引对应的对等行下标和列下标。siz 是一个包含 ndim(A) 个元素（此示例为 2 个元素）的向量，其中 siz(1) 为行数，siz(2) 为列数。. Indexing is also closely related to another term MATLAB users often hear: vectorization. Notice: Undefined index: HTTP_REFERER in /home/rongbienkfood. 오늘은 MATLAB 에서의 index 에 대해 알아 봤다. linearInd = sub2ind(arraySize, dim1Sub, dim2Sub, dim3Sub, ) returns the linear index equivalents to the specified subscripts for each dimension of an N-dimensional array of size arraySize. % Find the 3-D world coordinates of the centroids. ind2sub sub2ind. We use cookies for various purposes including analytics. A side note: Even built-in Matlab commands are often written in Matlab. The matrixSize input is a 2-element vector that specifies the number of rows and columns in the matrix as [nRows, nCols]. sinat_28507281：开始没闹明白，百度知道后才弄懂. Matlab Tips and Tricks Gabriel Peyr´e [email protected] Fast manipulation of multi-dimensional arrays in Matlab Kevin P. If OpenCV lacks of these functions, are there any C++ libs which provide equivalent functionality?. [I,J] = ind2sub(siz,IND) returns the matrices I and J containing the equivalent row and column subscripts corresponding to each linear index in the matrix IND for a matrix of size siz. Matlab’s sort function gives you a secondary output which can be used to resort your matrix. com > MATLAB_bgl_toolbox. The arraySize input is an n-element vector that specifies the number of dimensions in the array. For example, if A is a matrix, then max(A,[],2) is a column vector containing the maximum value of each row. Esta única columna se compone de todas las columnas de la matriz, cada una anexada a la última. You simply need to tell it the size of mat, and the row and columns subscripts. Pivoting in Maple/Matlab/Mathematica AM121 February 24, 2012 1 Maple Maple is great for doing simple matrix operations. It could be useful to extend sub2ind and ind2sub to work with triangular matrices. function phow_caltech101() % PHOW_CALTECH101 Image classification in the Caltech-101 dataset % This program demonstrates how to use VLFeat to construct an image % classifier on the Caltech-101 data. While MATLAB displays arrays according to their defined sizes and shapes, they are actually stored in memory as a single column of elements. If MatLab has problems finding the function in your directory-of-choice, then you may want to run the "which -all xlswrite1" command, which will indicate which folder MatLab thinks the xlswrite1. Based on your location, we recommend that you select:. Creating and manipulating matrices, and accessing elements. Corner Detection using Harris ind = sub2ind(size(cim),r,c); % 1D indices of feature points My way of learning matlab - i will only post code for working with. Now try open zeros. You can omit the parentheses and specify subplot as. sub2ind: average_moments: gaoptimset: nls_obj: subInt:. sub2ind() 함수는 subscripts 를 index 로 만들어주는 함수이다. OK, I Understand. Highest Number -> 1 Second Highest -> 2 etc. The same prog in matlab runs in 0. closest on an img to fade out the image. This instruction set is intended to provide a brief overview of how to use MATLAB, including basic syntax, working with variables, and using scripts, functions, and programs. This opens zeros. I have 2 matrices, one is a 2D matrix carrying an integer of labels and another a 3D matrix where each [row col] is a feature vector. The remaining inputs are scalars or vectors of subscripts to be converted. You get to see (and you can modify) the source code for the built-in sub2ind command (sub2ind. Today's blog post was written by Spandan Tiwari, a developer on the Image Processing Toolbox team. zip > CompareTree. MATLAB is an abbreviation for "matrix laboratory. Digest Article: Matrix Indexing in MATLAB. Open Mobile Search. Cell arrays. Move it a little further than 10 in each direction. Based on your location, we recommend that you select:. sub2ind: average_moments: gaoptimset: nls_obj: subInt:. To view these arguments, click the linked format names below. Posts about gaussian written by dgroseph. Here’s a little matlab function to output real isolines. The same prog in matlab runs in 0. Learn more about error MATLAB. % Find the 3-D world coordinates of the centroids. 5的元素的位置，分别求出它们的“全下标”和“单下标”。 展开. This is just a list of. You can omit the parentheses and specify subplot as. MATLAB 是美国MathWorks公司出品的商业数学软件，用于算法开发、数据可视化、数据分析以及数值计算的高级技术计算语言和交互式环境，主要包括MATLAB和Simulink两大部分。 重要功能： ·MATLAB®: MATLAB 语言的单元测试框架. You can specify a single dimension size of [] to have the dimension size automatically calculated, such that the number of elements in B matches the number of elements in A. How can I return the signed maximum absolute Learn more about maximum absolute value, maximum, minimum, for loop, if statement, matrices. Linear Algebra and Matlab tutorial 1. Implementing performance acceleration in MATLAB is a work in progress, and not all components of the MATLAB language can be accelerated at this time. I hope someone can assist me. It looks like you're trying to grab summary functions from each entry in a list, ignoring the elements set to -999. MATLAB ® has several indexing styles that are not only powerful and flexible, but also readable and expressive. 在线等 matlab sub2ind函数问题 随机生成一个二维数组A，试求该数组中所有大于0. Wednesday, October 13, 2010. Indexing is a key to the effectiveness of MATLAB at capturing matrix-oriented ideas in understandable computer programs. m, it creates a matrix of 0s. 蒙特卡洛法(随机取样法) 编写文件mengte. Problem Statement. I have two matrix: decision. Learn more about matlab, eval, antipattern, buggy, complex, bad code, pointless, cargo cult programming. ) Rendering with camera control using sphere orientation (elevation , azimuth, and yaw) or camera matrix Results rendered off-screen and returned as MATLAB matrices. Select a Web Site. You can also define your own data types. Is it even possible for a student of humanities to get access to such tools ?. A string argument triggers the behavior. Description. 此 MATLAB 函数 为大小是 matrixSize 的矩阵返回与行和列下标 rowSub 和 colSub 等效的线性索引。matrixSize 输入是一个包含 2 个元素的向量，该向量以 [nRows, nCols] 形式指定矩阵中的行和列数。. MATLAB news, code tips and tricks, questions, and discussion! We are here to help, but won't do your homework or help you pirate software. weixin_45067059：矩阵里头根本就没有5，怎么就5了. I’ve avoided the use of Matlab toolboxes or R packages which are not part of the core distributions. m is to convert integer labels (1, 2, 3) to a matrix of 0s and 1s. 在MATLAB中常用的亂數產生指令為rand，這是個依均勻機率分配出現之原則產生一個或一組在[0, 1]間之亂數，每次呼叫其值均不一樣。這些數值雖有其範圍，但產生之後可以作適當調整，以符合實際所需。所產生之數值可為單一數字，亦可為特定之矩陣，其大小由. 関数 sub2ind と関数 ind2sub を使用して、元の配列インデックスとその線形バージョン間で変換できます。たとえば、A の 3,2 要素の線形インデックスを計算します。. m, change:2008-09-12,size:398b. In older Matlab versions randperm used the sorting of random vectors also, but now the relation between data size and runtime looks like the faster Fisher Yates shuffle is used also, when it is called with 2 inputs:. matfile_open — Opens a Matlab binary MAT-file. Scilab-Windows平台下MATLAB的免费开源替代者 - HanDong. The MATLAB file format registry determines which file formats are supported. The effort you put into asking a question is often matched by the quality of our answers. Matlab supports 3 forms of indexing matrices. Discover what MATLAB. Behavior of mldivide in Octave relative to Matlab. Vectorizing Your Code. MATLAB is an abbreviation for "matrix laboratory. Indexing is also closely related to another term MATLAB users often hear: vectorization. The string argument can be "triu" or "tril". Then there are more specialized datatypes such as tables. I am trying to extract the feature vectors of a specific label. MATLAB中文论坛MATLAB 基础讨论板块发表的帖子：sub2ind 中sub 和 ind意思。sub2ind 中2是英文to的意思。。。但sub 和ind分别是什么缩写。. Matlab中使用sub2ind函数提高大数组访问速度在Matlab中访问大数组（如图像）的操作十分耗时，在已知要访问数组中多个元素对应的下标(row,col)时，利用sub2ind将下标转化成索引， 博文 来自： c_____的专栏. php(143) : runtime-created function(1) : eval()'d code(156) : runtime. Notice: Undefined index: HTTP_REFERER in /home/rongbienkfood. 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. Spaces are appended to each string as necessary to form a valid matrix. Tutorial on matrix indexing in MATLAB. Hi, First how do i create a mask matrix with zeroes at four X*X corners and ones at the remaining corners? Next,How do I multiply the mask matrix at the four corners with the input matrix so that it becomes zero at those specified X*X four corners and ones at the remaining corners?. [I,J] = ind2sub(siz,IND) returns the matrices I and J containing the equivalent row and column subscripts corresponding to each linear index in the matrix IND for a matrix of size siz. Between the Septembers of 2009 and 2010 I participated in an incentivised diet and exercise plan. I’ve avoided the use of Matlab toolboxes or R packages which are not part of the core distributions. 49 –MATLAB functions often take vectors or matrices as inputs. 8: --------------------------------------------------------- ** One of the biggest new features for Octave 3. subscripts rowSub and colSub for a matrix of size matrixSize. ind2sub Multiple subscripts from linear index. There was a time when I thought Matlab is a tool used by engineers. The matrixSize input is a 2-element vector that specifies the number of rows and columns in the matrix as [nRows, nCols]. I recently posted how to plot nice looking iso intervals of scalar fields on triangle meshes using matlab. Use the sub2ind function to create linear indices from your subscript matrix: Discover what MATLAB. Digest Article: Matrix Indexing in MATLAB 13 8 12 1 There is often confusion over how to select scattered elements from a matrix. linearInd = sub2ind(arraySize, dim1Sub, dim2Sub, dim3Sub, ) returns the linear index equivalents to the specified subscripts for each dimension of an N-dimensional array of size arraySize. I know I should do it with sub2ind but I dont know how. MATLAB中文论坛是中文MATLAB和Simulink用户的问答交流社区和分享平台，提供大量用户共享的学习教程和技术资源，包括版本更新、视频教程、模型和代码下载、算法分享。. Text strings. Description. Based on your location, we recommend that you select:. The ind2sub command determines the equivalent subscript values corresponding to a single index into an array. The sub2ind command determines the equivalent single index corresponding to a set of subscript values. 本課程"matlab之工程應用" (applications of matlab in engineering)旨在讓學生瞭解matlab使用的方法與過程,使其成為一個良好的研究工具。 9/27/2006 2. Most likely "size(I(index1))" does not match the needed column vector size. Indexing into a Matrix (Array) in MATLAB Two different ways of indexing: sub2ind - converts row-column subscript values to element-wise index values;. Learn more about sub2ind. What I know is that you can replace the place with a 0 and then run an If statement inside a for loop to create a new Array without that 0. The matrixSize input is a 2-element vector that specifies the number of rows and columns in the matrix as [nRows, nCols]. sub2ind Linear index from multiple subscripts. You can use it to extract the desired elements this way. Pivoting in Maple/Matlab/Mathematica AM121 February 24, 2012 1 Maple Maple is great for doing simple matrix operations. Cell arrays. Not a member of Pastebin yet? Sign Up, it unlocks many cool features!. OK, I Understand. MATLAB is a matrix language, which means it is designed for vector and matrix operations. This is just a list of. It could be useful to extend sub2ind and ind2sub to work with triangular matrices. 此 MATLAB 函数 为大小是 matrixSize 的矩阵返回与行和列下标 rowSub 和 colSub 等效的线性索引。matrixSize 输入是一个包含 2 个元素的向量，该向量以 [nRows, nCols] 形式指定矩阵中的行和列数。. sub2ind Linear index from multiple subscripts. Learn more about sub2ind. idx = sub2ind(size(A), row, col). MATLAB中文论坛MATLAB 基础讨论板块发表的帖子：sub2ind 中sub 和 ind意思。sub2ind 中2是英文to的意思。。。但sub 和ind分别是什么缩写。. Creating and manipulating matrices, and accessing elements. ind2sub和sub2ind这对函数，是互逆的一对函数。ind2sub把数组或者矩阵的线性索引转化为相应的下标；sub2ind则正好相反，将下标转化为线性索引。. MATLAB news, code tips and tricks, questions, and discussion! We are here to help, but won't do your homework or help you pirate software. 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. Thanks in advance. M-files : ASCII text files that contain sequences of matlab commands (. Posts about health written by dgroseph. MATLAB provides a function called sub2ind that converts from row and column subscripts to linear indices. Please cite one (or both) of the following papers if you use Armadillo in your research and/or software. CME 494: Introduction to Matlab Topics covered on 9/12/2017 Special Matrices: zeros, ones NaN eye rand,. Indexing into a Matrix (Array) in MATLAB Two different ways of indexing: sub2ind - converts row-column subscript values to element-wise index values;. 3행 5열이 linear index 로 몇 번째 인지를 알아 보자. Spaces are appended to each string as necessary to form a valid matrix. It also shows how you can use viscircles to visualize the detected. Go to the documentation of this file. After some loops and things, the function must access data in the matrix. 命令： linearInd = sub2ind(size(A), 2, 4) ans = 11 是相同的 linearInd = sub2ind(size(A), 2, 4, 1) ans = 11 实例 3 使用相同的 3 维输入数组 A 如在实例 1 中，只用一个完成工作五个单独的 sub2ind 命令。. sub2ind: average_moments: gaoptimset: nls_obj: subInt:. MATLAB中sub2ind和ind2sub函数怎么用？？能具体说明下吗？最好有例子··谢谢！ 我来答. Sharpen your programming skills while having fun!. The same prog in matlab runs in 0. sinat_28507281：开始没闹明白，百度知道后才弄懂. matlab里sub2ind和ind2sub怎么用，顺便解释一下这个里的sub2ind 和ind2sub!谢谢了! 我来答. Description. The MATLAB file format registry determines which file formats are supported. /NaN Matlab Files found in these Directories. reshaped array. Please inspect the values of r1, index1 and i.