OpenCV/C++：将 Mat 中的行/列复制到另一个？
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OpenCV/C++: Copying a row/column in a Mat to another?
提问by NOT A DOG NO SERIOUSLY
I know I can do this by copying each element myself, but is there a method that does it for me? I tried mat2.copyTo(mat1.row(0))but that doesn't work.
我知道我可以通过自己复制每个元素来做到这一点，但是有没有适合我的方法？我试过了，mat2.copyTo(mat1.row(0))但这不起作用。
回答by Ela782
Try
尝试
Mat mat1row = mat1.row(0);
mat2.copyTo(mat1row);
(assuming mat2 has the same size as the destination row).
（假设 mat2 与目标行的大小相同）。
That should do the job and is more clear.
这应该可以完成工作并且更清楚。
Edit: This is even shorter and recommended by the official documentation:
编辑：这更短，官方文档推荐：
A.row(j).copyTo(A.row(i));
More details on this in the official documentation: http://docs.opencv.org/modules/core/doc/basic_structures.html#Mat%20Mat%3a%3arow%28int%20y%29%20const
官方文档中的更多详细信息：http: //docs.opencv.org/modules/core/doc/basic_structures.html#Mat%20Mat%3a%3arow%28int%20y%29%20const
