If you’re willing to wait, I’m happy to return to the Calculus package in the spring. I’m focusing on DataFrames/DataArrays (and some database stuff that’s closely related) until then.
— John On Jan 21, 2014, at 8:42 AM, Hans W Borchers <hwborch...@gmail.com> wrote: > Thanks for these encouraging words. I have already written an R package with > more than a hundred numerical functions (incl. several numerical > derivatives), and I would be willing to help build up a numerical package in > Julia. But of course, someone from the Julia community will be needed to take > the lead. Please let me know when this 'management position'(?) has been > taken. > > On Tuesday, January 21, 2014 4:44:37 PM UTC+1, John Myles White wrote: > Just to chime in: the biggest problem with the Calculus isn’t the absence of > usable functionality, it’s that the published interface isn’t a very good one > and the more reliable interface, including things like > finite_difference_hessian, isn’t exported. > > To fix this, we need someone to come in and do some serious design work, > where they'll rethink interfaces and remove out-dated functionality. As Tim > Holy mentioned, the combination of the unpublished finite diference methods > and automatic differentation methods in DualNumbers should get you very far. > > — John >
