Yes Mike has got you going. If you haven't already I'd recommend looking through the test script which I've fixed the link to on the wiki page for the addon. It has some simple examples there.
http://www.jsoftware.com/jwiki/Addons/math/deoptim Glad to see that someone else has use for this. I suspect that the LBFGS routine just needs testing and updating for J7. I admit that I never got it going on J6 so am not sure what is required. On Fri, Sep 7, 2012 at 8:23 PM, Mike Day <mike_liz....@tiscali.co.uk> wrote: > New to me but I've just had a look, in J602. > > As you said, there seem to be a number of issues: > 1) your provided function needs to return a scalar result. > (+/@*:) 2 3 > 4 9 > (+/@:*:) 2 3 > 13 > So ssq should be +/@:*: > > 2) The locale for deoptim starts as pdeoptim > One way round appears to be to do > deoptim 'ssq_base_';_3 3 > ====================== > Generation: 1 > Best Value: 0.5667 > Best Var set: > _0.2958 _0.6922 > ====================== > Generation: 50 > Best Value: 0.0000 > Best Var set: > 0.0000 0.0000 > ====================== > Generation: 100 > Best Value: 0.0000 > Best Var set: > 0.0000 0.0000 > +------------------------+-----------+---- > |1.06998e_15 _3.06813e_15|1.05583e_29|2020| > | | | | > ....... > > Perhaps that's enough to get you going. > > As for lbfgs, it's in my addons\math folder > under J602. but not under J701. Perhaps the > addons gurus can tell you why. > > Mike > > > On 07/09/2012 5:35 AM, Piet de Jong wrote: >> >> I 'm trying to use the "deoptim" math addon package. >> >> However can't figure it out. Tried the following trite example to >> understand how things work. >> >> >> NB. Minimize the sum of squares within the range _3 to 3 >> >> require 'math/deoptim' >> >> ssq=:+/@*: >> deoptim 'ssq';_3 3 >> >> This fails for a variety of reasons which I cannot seem to grasp/fix up. >> >> Can anyone help? Once I can figure out a simple example like this I >> think I will be able to >> implement it on non trite examples. >> >> Also what has happened to the LBFGS minimization routine? >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm >> > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
