数据结构笔记——特殊矩阵的压缩存储

ゝ一纸荒年。 2023-02-11 11:26 119阅读 0赞

**目录**

一、一维数组的存储结构

二、二维数组的存储结构

三、普通矩阵的存储

四、对称矩阵的压缩存储

五、三角矩阵的压缩存储

六、三对角矩阵的压缩存储

七、稀疏矩阵的压缩存储

八、总结

--------------------

## **一、一维数组的存储结构** ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70][]

各数组元素大小相同，且物理上连续存放。

数组元素a\[i\]的存放地址=LOC + i \* sizeof(ElemType) (0<=i<10)

**注：除非题目特别说明，否则数组下标默认从0开始**

## **二、二维数组的存储结构** ##

![20200523152706708.png][]

**两种存储方式**

**行优先**

![2020052315271931.png][]

M行N列的二维数组b\[M\]\[N\]中，若按行优先存储，则b\[i\]\[j\]的存储地址 = LOC + (i\*N + j)\*sizeof(ElemType)

**列优先**

![20200523152735472.png][]

M行N列的二维数组b\[M\]\[N\]中，若按列优先存储，则b\[i\]\[j\]的存储地址 = LOC + (j\*M + i)\*sizeof(ElemType)

## **三、普通矩阵的存储** ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 1][]

## **四、对称矩阵的压缩存储** ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 2][]

**行优先存储**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 3][]

![20200523153937101.png][]

**列优先存储**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 4][]

## **五、三角矩阵的压缩存储** ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 5][]

**下三角矩阵存储**

![20200523154326383.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 6][]

**上三角矩阵存储**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 7][]

## **六、三对角矩阵的压缩存储** ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 8][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 9][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 10][]

![20200523155137508.png][]

## **七、稀疏矩阵的压缩存储** ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 11][]

稀疏矩阵：非零元素远远少于矩阵元素的个数

压缩存储策略：

顺序存储——三元组<行，列，值>

![20200523155318882.png][]

链式存储——十字链表法

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 12][]

![20200523155621899.png][]

## **八、总结** ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwMzEwMTQ4_size_16_color_FFFFFF_t_70 13][]

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