| Re: [eigen] converting matrices to/from byte arrays |
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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] converting matrices to/from byte arrays
- From: Benoit Jacob <jacob.benoit.1@xxxxxxxxx>
- Date: Tue, 20 Apr 2010 10:57:33 -0400
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Hi Sidney,
In Eigen 2.0, we don't handle strides: Map cannot work with strided arrays.
In the development branch, we do handle strides: see innerStride(),
outerStride() in class DenseBase. We also support strided arrays with
Map, although the API for that is still in flux, see:
http://eigen.tuxfamily.org/dox-devel/classEigen_1_1Map.html
(This API will be improved shortly, unfortunately breaking some compatibility)
Benoit
2010/4/20 Sidney Cadot <sidney.cadot@xxxxxxxxx>:
> Hi Ricard,
>
>> In order to get a pointer to the memory underlying a matrix just do.
>> myMatrix.data();
>
> Well, that gives me the pointer to the data elements, but I need to know a bit more about the inner data model of Eigen matrices, (in particular the potential use of strides; memory alignment issues; and the total size of the data block), in order to make a robust implementation.
>
> Is there a place where I can find out about this outside of the source code? If its only in the source, can I count on stability in coming releases?
>
> Regards,
>
> Sidney
>
>
>
>
>