如何排序在C＃中的二维数组 [英] How to Sort 2D Array in C#

问题描述

我读过很多有关排序的二维数组的职位，但我仍然不能掌握它，所以我想知道是否有人能提供我一些意见...

我列出的字母和数量（我做一块文本的频率曲线变化分析）的阿雷。我读过这个数据到一个矩形阵列，并需要通过频率最高的第一个订购。这里是我的code迄今：

  //创建二维数组包含ASCII code和数量
    INT [，] letterFrequency =新INT [26，2];    //在二维数组填充ascaii code和数量
    而（asciiNo＆LT; = 90）
     {       而（（encryptedText.Length  -  1）＆GT;计数器）
      {
                如果（asciiNo ==（INT）encryptedText [指数]）
               {
                      letterCount ++;
               }
                反++;
                指数++;
      }    letterFrequency [（STORECOUNT），（0）] =（char）的（STORECOUNT + 66）;
    letterFrequency [（STORECOUNT），（1）] = letterCount;
    STORECOUNT ++;
    计数器= 0;
    索引= 0;
    letterCount = 0;
    asciiNo ++;
    }
 

解决方案

您正在使用一个二维数组来重新present 2个独立的载体 - 符号和计数。相反，使用2个独立的数组。拥有的Array.Sort过载是发生在有一个阵列2阵列和排序，但将更改应用于两个，实现你想要什么。

这也将允许您使用一个char []的人物，而不是INT []：

 的char []符号= ...
INT [] =计...
...加载数据...
的Array.Sort（计数，符号）;
// 全做完了！
 

目前
点，计数已订购，而符号将仍然匹配指数按指数与它们涉及到的数量。

I've read lots of posts about sorting a 2D array but I still can't master it so I was wondering if anyone can offer me some advice...

I have an aray which lists letters and quantity (I'm doing a frequency anaysis on a piece of text). I've read this data into a rectangle array and need to order it by highest frequency first. Here's my code so far:

    //create 2D array to contain ascii code and quantities
    int[,] letterFrequency = new int[26, 2];

    //fill in 2D array with ascaii code and quantities
    while (asciiNo <= 90)
     {

       while ((encryptedText.Length - 1) > counter)
      {
                if (asciiNo == (int)encryptedText[index])
               {
                      letterCount++;
               }
                counter++;
                index++;
      }

    letterFrequency[(storeCount), (0)] = (char)(storeCount+66);
    letterFrequency[(storeCount), (1)] = letterCount;
    storeCount++;
    counter=0;
    index=0;
    letterCount = 0;
    asciiNo++;
    }

解决方案

You are using a 2D array to represent 2 separate vectors - the symbols and the counts. Instead, use 2 separate arrays. Array.Sort has an overload that takes 2 arrays, and sorts on one array, but applies the changes to both, achieving what you want.

This would also allow you to use a char[] for the characters rather than int[]:

char[] symbols = ...
int[] counts = ...
...load the data...
Array.Sort(counts, symbols);
// all done!

At this point, the counts have been ordered, and the symbols will still match index-by-index with the count they relate to.

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