Phil Steitz a écrit : > Luc Maisonobe wrote: >> In order to solve issue MATH-172 and for other related needs, I have >> started work on the ordinary differential equations package as some of >> you may have noticed. >> >> The first phase was simple cleaning: reorganizing the package that was >> becoming quite huge. There are now several subpackages: >> - nonstiff which provides integrators (and continuous output >> interpolators) for non-stiff problems >> - sampling which deals with step handlers (fixed and variable steps) >> - events which deals with discrete events (what used to be called >> switching functions in the previous version) >> >> The second phase is under development: introducing new simple multistep >> integrators: fixed step explicit Adams-Bashforth, fixed step implicit >> Adams-Moulton and BDF, still for non-stiff problems. This is a little >> harder than I thought at first, because I really want this integrators >> to provide the same rich features as the existing ones: multiple >> discrete events handling, continuous output, events handlers. I also >> wanted a user customizable autostart feature (multistep methods need >> some help to get started). I did not find any reference to continuous >> output models for these simple integrators, so I had to develop the >> underlying equations myself. I hope to check a few new classes soon. >> Meanwhile, I also have to change a little the shared API with the >> existing integrators, in order to get a consistent package. >> >> The third phase will consist in implementing integrators able to handle >> stiff problems. I will probably start with a port of LSODE (from netlib, >> available under a BSD type license) which is based on GEAR method. >> >> Luc >> >> > Just got this > Test set: org.apache.commons.math.ode.ContinuousOutputModelTest > ------------------------------------------------------------------------------- > > Tests run: 4, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.053 > sec <<< FAILURE! > testModelsMerging(org.apache.commons.math.ode.ContinuousOutputModelTest) > Time elapsed: 0.018 sec <<< FAILURE! > junit.framework.AssertionFailedError: expected:<1.0> but was:<NaN> > at junit.framework.Assert.fail(Assert.java:47) > at junit.framework.Assert.failNotEquals(Assert.java:277) > at junit.framework.Assert.assertEquals(Assert.java:98) > at junit.framework.Assert.assertEquals(Assert.java:105) > at > org.apache.commons.math.ode.ContinuousOutputModelTest.testModelsMerging(ContinuousOutputModelTest.java:129)
Ooops. Sorry for that. I hope this is fixed now. Thanks for reporting it. Luc > > > Phil >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [EMAIL PROTECTED] >> For additional commands, e-mail: [EMAIL PROTECTED] >> >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
