Hi Matthias,
I can't be sure of the real reasons for that, but my take is that:
- the methods you are referring to are not meaningful at the level of the
common base class for DiagonalMatrix and Matrix (i.e. EigenBase), so they
are not implemented there and DiagonalMatrix does not inherit them
- there are easy workarounds to achieve the same goal, that are usually as
efficient as a special implementation would be.
In your case, you can achieve what you want with:
DiagonalMatrix<double, Dynamic> M(10);
M.diagonal().setOnes();
std::cout << M.toDenseMatrix() << std::endl;
Idem for M.diagonal().setRandom()
Best regards,
Adrien
On Tue, Oct 20, 2020 at 4:38 PM Matthias Peschke <
[email protected]> wrote:
> I recently start using the type Eigen::DiagonalMatrix but it seems that
> some methods for this type are missing. This includes the stream
> operator which is not present so that the following does not compile:
>
> Eigen::DiagonalMatrix<double,-1> M(10); M.setIdentity();
> std::cout << M << std::endl;
>
> Another example is setRandom() which is not implemented and there are no
> block operations present.
>
> Is there a special reason for this or it is because
> Eigen::DiagonalMatrix is rarely used?
>
> Best regards,
> Matthias
>
>
>
>
