Re: new ODE functions

[c.]

On 17 Dec 2016, at 10:40, c. <address@hidden> wrote:
> 
> I would also like to have a very clear warning when SUNDIALS
> is available but KLU is not.
> 
> In preliminary tests ode15i is more than 10 faster than DASPK
> for systems with sparse jacobian when using KLU, while it gives
> negligible advantages without it.

The attached example can be used to measure the impact of using a sparse 
Jacobian.
On my system I get:

  Elapsed time = 3270.39 s. for DASPK, 21.3246 s. for ode15i

I'd really like users to know that they may incur a slowdown by a factor of 150 
if
they decide to skip installing KLU just because that's how the debian package 
for 
SUNDIALS is built ...

c.

fitzhugh_nagumo_ode15i_vs_daspk.m
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