% 功能:创建一个5列10000行、密度为0.01的稀疏矩阵并将其存入excel中% 设置随机数生成器种子,确保结果可复现(可选)rng(0);% 定义矩阵尺寸和稀疏度rows=10000;cols=5;density=0.01;% 创建一个稀疏矩阵,密度为0.01sparseMatrix=sprand(rows,cols,density);% 将稀疏矩阵转换为全矩阵fullM
S = sparse(i,j,v) generates a sparse matrix S from the triplets i, j, and v such that S(i(k),j(k)) = v(k). The max(i)-by-max(j) output matrix has space allotted for length(v) nonzero elements. If the inputs i, j, and v are vectors or matrices, they must have the...
matlab 稀疏矩阵(sparse matrix) 参数的设置:spparms() spparms('spumoni', 3);:Set sparse monitor flag to obtaindiagnostic output 1. 创建稀疏矩阵 A = sparse(M, N); % 默认得到的是全 0 稀疏矩阵; 2. spdiags 提取稀疏矩阵的“对角线” [B,d]= spdiags(A) % d 表示的是非零对角线所对应的编...
Matlab中使用稀疏矩阵就一定快? 稀疏矩阵(sparse matrix)指的是元素大部分为零的矩阵。与之相对的就是稠密矩阵(densematrix) 稀疏矩阵的主要优点有: 节省内存空间 对于零值元素百分比很高的大型矩阵,由于不存储零值元素,可以极大地减少存储数据所需的内存量。 提高计算效率 ...
针对矩阵格式介绍的benchmark: Evaluation Criteria for Sparse Matrix Storage Formats 类似于综述。这篇文章调研了2015年之前在多核共享内存系统中常见的矩阵格式。这篇文章认为,对于一个新的考虑一个针对SpMV的数据格式,仅仅使用FLOPS这样的指标是不够的,要考虑多个方面:1)FLOPS,和SpMV的执行时间相关;2)相对于CSR的...
Apply Exponential Function to Sparse Matrix Copy Code Copy Command Create a 4-by-4 sparse diagonal matrix. Get S = diag(sparse(1:4)) S = 4×4 sparse double matrix (4 nonzeros) (1,1) 1 (2,2) 2 (3,3) 3 (4,4) 4 Apply the exponential function to the nonzero elements of...
In MATLAB, you can create a sparse matrix using the sparse function. This function allows you to specify the non-zero values and their corresponding row and column indices. The sparse function automatically converts the non-zero elements of the dense matrix into a sparse format while omitting ...
S = sparse(i,j,v) generates a sparse matrix S from the triplets i, j, and v such that S(i(k),j(k)) = v(k). The max(i)-by-max(j) output matrix has space allotted for length(v) nonzero elements. If the inputs i, j, and v are vectors or matrices, they must have the...
sir,i have an image and want to find out its "SPARSE-MATRIX".i have tried the code like S=sparse(a);where 'a' is my image.but i got an error like "Undefined function or method 'sparse' for input arguments of type 'uint8'."MY AIM IS JUST TO FIND OUT THE SPARSE MATRIX OF THE...
sparse函数 功能:Create sparse matrix-创建稀疏矩阵 用法1:S=sparse(X)——将矩阵X转化为稀疏矩阵的形式,即矩阵X中任何零元素去除,非零元素及其下标(索引)组成矩阵S。 如果X本身是稀疏的,sparse(X)返回S。 例如: A= 0 2 0 4 0 6 7 0 0