如图所示下载后会自动安装，完成后重启在进行下一步设置。
如果下载卡住或者太慢可以采用网站下载。
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Qt在vs2019中使用
WTQRookie 于 2020-06-09 14:39:44 发布 4563 收藏 18
下载对应Qt扩展
在vs2019中搜索下载qt vs tools
如图所示下载后会自动安装，完成后重启在进行下一步设置。
如果下载卡住或者太慢可以采用网站下载。
在visual studio网站中下载
如图下载后关闭所有有关vs2109程序，然后如正常安装软件双击运行就行。
在Qt网站中下载对应扩展addin
网站：https://download.qt.io/official_releases/vsaddin/
选择一个版本就行，一般最新的就可以
如图下载后关闭所有有关vs2109程序，然后如正常安装软件双击运行就行
安装扩展时出现的问题
查看安装失败时，一定要确认已经安装好Qt与vs2019
如果安装时出现双击扩展安装没有反应，打开Visual Studio Installer
一定要确保如果你使用更新一定要保证新的vs版本下载并安装完毕，如图，当然如果不是最新版本也可以，只要保证不是正在下载就行。
vs2019中qt设置
当你安装成功扩展就会发现扩展中已经出现qt vs tool 了
之后进入设置
如图选择你使用的编译环境文件夹点击确定，然后OK,之后你会发现
点击ok
之后重启vs2019就可以了在新建项目中看到Qt了。如图
就跟qt中使用是一样的了。
QR Decomposition
joeland209 于 2017-03-16 23:39:33 发布 2170 收藏 5
QR分解法多用于解决线性代数问题中最小二乘法(Least Square Method)计算线性函数的系数。是其中一种计算特征根的方法，可用于降维。QR分解用到了施密特正交化过程( Gram–Schmidt process )，得出一个正交矩阵X。
首先我们先用施密特正交化过程( Gram–Schmidt process )对A进行分解，
其中Q是一个标准化的正交矩阵(Normalized Orthogonal Matrix)，R是一个上三角矩阵(Upper Triangular Matrix)。
随便选择一列(在这个例子中就选第一列好了)，作为基准，并作为第一列的偏正交基(Partial Orthogonal Basis)，以下简称PoB，记为X
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