V2EX sorted matrix

Sorted Matrix

Definition / 释义

sorted matrix(有序矩阵;排序矩阵):指矩阵(二维数组)中的元素按某种规则“有序”排列,常见的是每一行按升序排列,并且有时还要求每一列也按升序排列(具体约束取决于题目或语境)。该概念常用于算法与数据结构中,便于进行高效查找(如二分查找或“从角落走”的搜索)。

Pronunciation (IPA) / 发音(IPA)

/srtd metrks/

Examples / 例句

A sorted matrix makes searching faster.
有序矩阵能让查找更快。

Given a sorted matrix where each row and column is increasing, you can find the target in linear time by scanning from the top-right corner.
在一个行与列都递增的有序矩阵中,你可以从右上角开始扫描,用线性时间找到目标值。

Etymology / 词源

sorted 来自动词 sort(“整理、分类、排序”),与“把事物按规则排好”有关;matrix 源自拉丁语 matrix(本义与“母体/来源”相关),在数学中引申为“用于组织与表示数值的表格结构”。组合成 sorted matrix,即“元素已按规则排序的矩阵”。

Related Words / 相关词汇

Notable Works / 作品与文献中的用例

  • Thomas H. Cormen et al., Introduction to Algorithms(《算法导论》):在“查找、排序、数据结构”相关章节中常讨论有序结构(包括二维数组/矩阵的变体)用于加速搜索。
  • Donald E. Knuth, The Art of Computer Programming(《计算机程序设计艺术》):涉及排序与查找理论,常以多种数据组织形式(含二维结构的讨论)说明算法思想。
  • Jon Bentley, Programming Pearls(《编程珠玑》):以问题驱动方式讨论“如何利用有序性提高查找效率”,与有序矩阵类题目思路高度相关。
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