Indexing into a matrix is a means of selecting or modifying a subset of elements from the matrix. MATLAB®has several indexing styles that are not only powerful and flexible, but also readable and expressive. Matrices are a core component of MATLAB for organizing and analyzing data, and index...
Matrix Indexing in MATLABEddins, SteveShure, Loren
I want to get a 2d matrix after summing 3d matrix based on an index. Or how can I project the indexed sum to a 2d matrix? The example below gives only the sum for the indexes. datax = rand(3,3,5); cr1 = int32(randi([0, 1], [1, 45])); ...
Vote 0 Link I'm trying to index a large matrix, with the goal of finding/indexing the first value to meet a threshold. Right now I'm doing it in a loop, but it's rather slow. For example: a=[10 13 14 15 16;... 11 12 15 16 17;... 3 5 8 9 12]; threshold=11.5; I...
La**之后 上传307KB 文件格式 pdf matrix Tutorial on matrix indexing in MATLAB 关于matrix的index 索引的引用说明 点赞(0) 踩踩(0) 反馈 所需:1 积分 电信网络下载 MobileService 2025-02-11 13:19:22 积分:1 实训作业 2025-02-11 13:18:28 积分:1 ...
Logical Indexing instead of loops in 3D-Matrices. Learn more about logical indexing, loop, 3d matrix, vectorization, if condition, logical operations MATLAB
For 3D matrix input A, the sum of diagonals of A(:,:,k) are returned in sumMat(:,k). The script is typically faster than a for-loop based approach when A is 3D. The code is most efficient for wide or tall matrices. Inline the code when it is used as a part of an iterative ...
19、rds as a 1-by-1 array, size(X) returns the vector 1 1.m,n = size(X) returns the size of matrix X in separate variables m and n.m= size(X,dim) returns the size of the dimension of X specified by scalar dim.d1,d2,d3,.,dn= size(X), for n 1, returns the sizes ...
Index exceeds matrix dimensions.. Learn more about parallel computing, parallel computing toolbox, spmd MATLAB Coder, Parallel Computing Toolbox
% Beware of Matlab's linear indexing variable = variable'; % Write mode as default if ( ~exist('flag','var') ) flag = 'w'; end if ( ~exist(fileName,'file') || flag == 'w' ) % New file or write mode specified file = fopen( fileName, 'w');%不存在则创建写入模式 ...