线性代数回顾:矩阵运算
2016-04-17 15:24
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矩阵为线性代数中的重点,而矩阵运算就是矩阵的基础,这篇文章主要是回顾矩阵运算;
矩阵基本运算:加法、减法、数乘、乘法、转置等
1、加法规则
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151311613-2038352641.png)
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151201098-1789215294.png)
示例
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151230582-1263101790.png)
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151622066-561173756.png)
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151657770-374059392.png)
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151710238-30202903.png)
1、数乘规则
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151747520-1358813262.png)
示例
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151758941-559384151.png)
1、矩阵乘法规则
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151826723-637113147.png)
示例
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151843098-1429491225.png)
1、转置规则
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151902410-572223474.png)
示例
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151925613-121961209.png)
文章首发地址:Solinx
http://www.solinx.co/archives/585
矩阵基本运算:加法、减法、数乘、乘法、转置等
矩阵加法
矩阵加法规则为每个矩阵对应的元素相加,当且仅当两个矩阵具有相同的维数矩阵加法才有定义;1、加法规则
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151311613-2038352641.png)
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151201098-1789215294.png)
示例
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151230582-1263101790.png)
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151622066-561173756.png)
矩阵减法
矩阵减法规则与矩阵加法相同也是对应元素上的数做减法运算,且仅当两个矩阵具有相同的维数矩阵减法才有定义;![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151657770-374059392.png)
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151710238-30202903.png)
矩阵数乘
矩阵数乘是指矩阵与标量做乘法运算,运算规则为:矩阵每个元素与标量相乘得出结果为一个矩阵;1、数乘规则
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151747520-1358813262.png)
示例
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151758941-559384151.png)
矩阵乘法
矩阵乘法为两个矩阵相乘,有矩阵A、B,矩阵AB相乘规则为矩阵A的每一行乘以矩阵B的每一列,AB行数等于A的行数、AB列数为B的列数;当且仅当A的列数等于B的行数时矩阵乘法有定义;1、矩阵乘法规则
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151826723-637113147.png)
示例
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151843098-1429491225.png)
矩阵转置
矩阵转置运算指为把矩阵行变换为列,得到的矩阵为转置矩阵;1、转置规则
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151902410-572223474.png)
示例
![](https://images2015.cnblogs.com/blog/84976/201604/84976-20160417151925613-121961209.png)
文章首发地址:Solinx
http://www.solinx.co/archives/585
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