原文:[LeetCode] Sparse Matrix Multiplication 稀疏矩陣相乘

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: 這道題讓我們實現稀疏矩陣相乘,稀疏矩陣的特點是矩陣中絕大多數的元素為 ,而相乘的結果是還應該是稀疏矩陣,即還是大多數元素為 ,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包來構建稀疏矩陣 | sparse matrix by dgCMatrix

sparse matrix是用來存儲大型稀疏矩陣用得,單細胞表達數據基本都用這個格式來存儲,因為單細胞很大部分都是0,用普通文本矩陣存儲太占空間。 使用也是相當簡單: library("Matrix") readsCount <- read.csv("data ...

Thu Mar 29 01:16:00 CST 2018 0 3450
 
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