Re: [Help-gsl] Resizing vectors and matrices

[John Lamb]

address@hidden wrote:
> I am using the GNU Scientific Library to write software that simulates 
> the evolutionary process. Specifically, I have an ODE-system and need to 
> add equations at run-time corresponding to new mutants entering the 
> system. Since I do not know from the outset how large the system will be 
> at its peak, it would be convenient to resize the matrices and vectors 
> containing the parameters when needed. However, I have not been able to 
> find any clean way of doing this.

You could look at how the C++ standard template library allows you to 
increase the size of a vector. This uses two numbers: the size is what 
you use and the capacity is what you have available. You can resize 
(change the size) whenever you want. If the new size exceeds the 
capacity, you create new vectors with capacity the first power of two 
bigger than the new size, copy and reassign.

All of this is a lot easier in C++ than in C because you can just extend 
gsl vectors to do what you want. But it should still be reasonably easy 
in C.

--
JDL