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[1/4]解决USB摄像头打开相机预览界面绿屏
liyujie
2025-08-28
b3810562527858a3b3d98ffa6e9c9c5b0f4a9a8e
[~lzh/A133.git]
/
android
/
external
/
eigen
/
doc
/
snippets
/
PartialRedux_count.cpp
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Matrix3d m = Matrix3d::Random();
cout << "Here is the matrix m:" << endl << m << endl;
Matrix<ptrdiff_t, 3, 1> res = (m.array() >= 0.5).rowwise().count();
cout << "Here is the count of elements larger or equal than 0.5 of each row:" << endl;
cout << res << endl;