Hi,

I was wondering if there is a way to initialize a const Matrix, something like the following:

Code: Select all

class MyClass{

public:

const Eigen::Matrix<double,2,2> M;

MyClass() : M(1,2,3,4) {}

};


Thanks for your help.

n2k wrote:I was wondering if there is a way to initialize a const Matrix ...

There is, through the comma initializer.

Code: Select all

const Matrix2d tmp( (Matrix2d() << 1, 2, 3, 4).finished() );


HTH,
Hauke

Does this approach incur a runtime cost or will this initialization be done statically?

that depends on the complexity of the initialization and on the ability of the compiler to optimize the underlying code. In my experience, the compiler always did a pretty good job to eliminate all runtime code.