Re: [Toon-members] Question: Dynamical resizable Matrix

[E. Rosten]

On Sun, 11 Oct 2009, Gabriel Nützi wrote:

> Hello everyone
>
> Is there a possibility to resize a Matrix, or to append during runtime more 
> elements or rows&columns? in an efficient way ?
> Does anybody know about how to do this with TooN?

Unfortunately, this is not implemented yet.

As an interim step, you can keep the data in a std::vector, and present it 
as a matrix. Eg:

std::vector<double> data;

...
...
...

  wrapMatrix(&data[0], num_rows, num_cols)  //This returns a matrix.


This assumes that the data is in row major order (ie you are adding rows).

You can also declare a matrix which references the data:

Matrix<Dynamic, Dynamic, double, Reference::RowMajor> m(&data[0], num_rows, 
num_cols);

You can also wrap column major data (ie you are adding rows) this way.

-Ed




> Thanks a lot for any advice!!
>
> Regards Gabriel
>
>
>
>
>
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