在C ++中将Matlab矩阵转换为数组的有效方法 [英] Efficient way of converting matlab matrix to array in c++

问题描述

我有一个Matlab代码，应该将其转换为c ++. 在一个文件中，有很多矩阵，我想将它们转换为数组(或向量).我需要转换这些矩阵的有效方法.

I have a Matlab code which I should convert to c++. In one file there are a lot of matrices and I want to convert them to arrays(or vectors). I need efficient way of converting those matrices.

f = [   -.000212080863  .000358589677   .002178236305   ...
        -.004159358782  -.010131117538  .023408156762   ...
        .028168029062   -.091920010549  -.052043163216  ...
        .421566206729   .774289603740   .437991626228   ...
        -.062035963906  -.105574208706  .041289208741   ...
        .032683574283   -.019761779012  -.009164231153  ...
        .006764185419   .002433373209   -.001662863769  ...
        -.000638131296  .000302259520   .000140541149   ...
        -.000041340484  -.000021315014  .000003734597   ...
        .000002063806   -.000000167408  -.000000095158  ];

我尝试过类似的操作，但是我所有的尝试都给出了一些错误.

I tried things like this but all my trials give some errors.

int* first;
first = new int[5];
first = {1,2,3,4,5};

注意:我可以输入逗号并将[手动更改为{.

Note: I can put commas and change [ to { manually.

谢谢

推荐答案

如果该值是常量(例如，每次您想更改该值，您很高兴重新编译)，则可以执行以下操作:

If the value is constant (as in, you are happy to recompile for each time you want to change the values), then you can do:

double f[] = {  -.000212080863,  .000358589677,   .002178236305,   ... };

(请注意添加了逗号和大括号，而不是方括号).

(Note the addition of commas, and curly brackets instead of square ones).

如果值正在更改，那么您想使用vector<double> f;，稍微清理一下输入内容，然后使用类似以下内容:

If the values are changing, then you want to use a vector<double> f;, clean up the input a bit and use something like:

ifstream infile("numbers.txt"); 
while(infile >> value) 
{ 
   f.push_back(value); 
}

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