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

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. Example: 这道题让我们实现稀疏矩阵相乘,稀疏矩阵的特点是矩阵中绝大多数的元素为 ,而相乘的结果是还应该是稀疏矩阵,即还是大多数元素为 ,那 ...

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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
 
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