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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] Mapping a dynamic vector - howto
- From: Márton Danóczy <marton78@xxxxxxxxx>
- Date: Wed, 19 Sep 2012 11:56:34 +0200
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Hi,
Map<MatrixXd> M(X.data(), n, n);
Marton
On 19.09.2012, at 11:37, Helmut Jarausch wrote:
> Hi,
>
> in several contexts (e.g. PDE) one has a (long)
>
> VectorXd X(N)
>
> where one knows that N = m*m . ( m, N unknown at compile time)
>
> Often one wishes to interpret this vector as an m x m matrix (for reading and writing).
> How can this be achieved with Eigen?
>
> Many thanks for a hint,
> Helmut.
>
>