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Questions - eigen3

`std::move` an Eigen object in a constructor?

The Eigen3 documentation warns against passing Eigen objects by value, but they only refer to objects being used as function arguments. Suppose I'm using Eigen 3.4.0 and C++20. If I have a struct with...
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NickFP

c++

eigen

eigen3

Votes: 0

Answers: 1

Latest Answer

There is nothing magic about Eigen objects. Fixed sized types such as Vector3d behave like std::array. Dynamic sized types like VectorXd behave like std::vector. Pass-by-value for a dynamic sized type...
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Homer512

Better way to implement ATA when A is lower triangular matrix

In Eigen library to implement A^T*A one can write: X.template triangularView<Lower>().setZero(); X.template selfadjointView<Lower>().rankUpdate(A.transpose()); Is there any better (more ...
test-img

user15247377

c++

eigen3

Votes: 0

Answers: 1

Latest Answer

Eigen typically includes only those matrix routines that have a corresponding function in BLAS. There is no BLAS routine for this particular case. One additional wrinkle is that Eigen's implementation...
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Homer512

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