Hello, One large change that was done for version 2.1 was to add a way to compute the partial derivatives of an ODE final state with respect to both its initial state and problem parameters. This was done by creating a new ode.jacobians package.
As time as shown, this attempt is really clumsy. Some issues have been raised (MATH-380, MATH-381, MATH-388). The package is difficult to use and it duplicates many features from the raw ode package. From a user point of view, the current implementation is bad. As I suggested in the comment for MATH-380, a completely new implementation should be done. We are working with Pascal on a new implementation which would be much more smoothly integrating with the top level ode package and which would allow the same user code to be used in both cases : with or without partial derivatives. The new implementation implies adding a few methods to public interfaces, so it breaks compatibility and cannot be introduced in 2.X branch. I would like to deprecate the complete ode.jacobians package right now to prevent people from building application on it, to postpone MATH-380 to 3.0 (MATH-381 is already scheduled for 3.0). What do you think about this change ? best regards, Luc --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
