原文:[LeetCode] 311. Sparse Matrix Multiplication 稀疏矩阵相乘

Given twosparse matricesAandB, return the result ofAB. You may assume thatA s column number is equal toB s row number. Example: 给 个稀疏矩阵,返回矩阵相乘的结果。 在数值分析中,稀疏矩阵 Sparse matrix ,是其元素大部分为零的矩阵。反之,如果大部分元素都非零 ...

2018-09-23 15:32 0 797 推荐指数:

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Leetcode: Sparse Matrix Multiplication

70ms solution: use one HashTable: 160 ms The idea is derived from a CMU lecture. A sparse matrix can be represented as a sequence ...

Thu Dec 31 15:57:00 CST 2015 0 2301
[LeetCode] Sparse Matrix Multiplication

Problem Description: Given two sparse matrices A and B, return the result of AB. You may assume that A's column number is equal to B's row number. ...

Thu Dec 03 21:39:00 CST 2015 0 4329
用R的dgCMatrix包来构建稀疏矩阵 | sparse matrix by dgCMatrix

sparse matrix是用来存储大型稀疏矩阵用得,单细胞表达数据基本都用这个格式来存储,因为单细胞很大部分都是0,用普通文本矩阵存储太占空间。 使用也是相当简单: library("Matrix") readsCount <- read.csv("data ...

Thu Mar 29 01:16:00 CST 2018 0 3450
scipy.sparse 稀疏矩阵

from 博客园(华夏35度)http://www.cnblogs.com/zhangchaoyang 作者:Orisun 本文主要围绕scipy中的稀疏矩阵展开,也会介绍几种scipy之外的稀疏矩阵的存储方式。 dok_matrix 继承自dict,key是(row,col ...

Thu Nov 02 21:54:00 CST 2017 0 2459
 
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