2014-10-09 11:00 GMT+02:00 luc <l...@spaceroots.org>:
> Le 2014-10-09 09:51, Dennis Hendriks a écrit :
>
>> Hi all,
>>
>
> Hi Dennis,
>
>
>> From the subject of emails of the git commits (e.g. 'git commit: fixed
>> too long first step in fixed Runge-Kutta integrators.'), it can no
>> longer be seen that the commit is for a specific sub component of
>> commons (e.g. 'commons-math'). It can be seen from the first line of
>> the email itself ('Repository: commons-math'). Would it be possible to
>> include the repository name as prefix of the subject? Something like:
>> '[commons-math] git commit: ...'? That would make email client
>> filtering rules etc possible.
>>
>> When commons-math used Subversion in the past, it could be seen from
>> the path. That is, the subject of the email was 'svn commit: r1554646
>> - in /commons/proper/math/trunk/src:
>> main/java/org/apache/commons/math3/geometry/
>> main/java/org/apache/commons/math3/geometry/euclidean/oned/
>> main/java/org/apache/commons/math3/geometry/euclidean/threed/
>> main/java/org/apache/common...' or so, and included
>> '/commons/proper/math' near the beginning, usually making filtering
>> possible.
>>
>
> We are aware of this problem and have already raised an issue about it
> at Apache infrastructure. You can see the issue here: <
> https://issues.apache.org/jira/browse/INFRA-8382>.
>
Luc, you have done such a great job taking the lead in the first migration
to git. May I ask you to document the hassles you stumbled across in our
wiki so other components can migrate more easily (if they wish to)
thank you!
>
> best regards,
> Luc
>
>
>
>> Best regards,
>> Dennis
>>
>>
>> On 10/08/2014 02:40 PM, l...@apache.org wrote:
>>
>>> Repository: commons-math
>>> Updated Branches:
>>> refs/heads/master 86b92b4e5 -> 69273dca6
>>>
>>>
>>> fixed too long first step in fixed Runge-Kutta integrators.
>>>
>>> This change is similar to the one done two years ago for adaptive step
>>> sizes integrator.
>>>
>>> JIRA: MATH-727
>>>
>>>
>>> Project: http://git-wip-us.apache.org/repos/asf/commons-math/repo
>>> Commit: http://git-wip-us.apache.org/repos/asf/commons-math/commit/
>>> 69273dca
>>> Tree: http://git-wip-us.apache.org/repos/asf/commons-math/tree/69273dca
>>> Diff: http://git-wip-us.apache.org/repos/asf/commons-math/diff/69273dca
>>>
>>> Branch: refs/heads/master
>>> Commit: 69273dca6188a3d7d629d0d32dcf9cdb5b6c1036
>>> Parents: 86b92b4
>>> Author: Luc Maisonobe <l...@apache.org>
>>> Authored: Wed Oct 8 14:25:05 2014 +0200
>>> Committer: Luc Maisonobe <l...@apache.org>
>>> Committed: Wed Oct 8 14:25:05 2014 +0200
>>>
>>> ----------------------------------------------------------------------
>>> .../ode/nonstiff/RungeKuttaIntegrator.java | 14 +++++++++++-
>>> .../ClassicalRungeKuttaIntegratorTest.java | 24
>>> ++++++++++++++++++++
>>> 2 files changed, 37 insertions(+), 1 deletion(-)
>>> ----------------------------------------------------------------------
>>>
>>>
>>> http://git-wip-us.apache.org/repos/asf/commons-math/blob/
>>> 69273dca/src/main/java/org/apache/commons/math3/ode/
>>> nonstiff/RungeKuttaIntegrator.java
>>> ----------------------------------------------------------------------
>>> diff --git
>>> a/src/main/java/org/apache/commons/math3/ode/nonstiff/RungeKuttaIntegrator.java
>>> b/src/main/java/org/apache/commons/math3/ode/nonstiff/
>>> RungeKuttaIntegrator.java
>>> index 68bd8b0..5f7d5d8 100644
>>> --- a/src/main/java/org/apache/commons/math3/ode/nonstiff/
>>> RungeKuttaIntegrator.java
>>> +++ b/src/main/java/org/apache/commons/math3/ode/nonstiff/
>>> RungeKuttaIntegrator.java
>>> @@ -119,7 +119,19 @@ public abstract class RungeKuttaIntegrator extends
>>> AbstractIntegrator {
>>>
>>> // set up integration control objects
>>> stepStart = equations.getTime();
>>> - stepSize = forward ? step : -step;
>>> + if (forward) {
>>> + if (stepStart + step >= t) {
>>> + stepSize = t - stepStart;
>>> + } else {
>>> + stepSize = step;
>>> + }
>>> + } else {
>>> + if (stepStart - step <= t) {
>>> + stepSize = t - stepStart;
>>> + } else {
>>> + stepSize = -step;
>>> + }
>>> + }
>>> initIntegration(equations.getTime(), y0, t);
>>>
>>> // main integration loop
>>>
>>> http://git-wip-us.apache.org/repos/asf/commons-math/blob/
>>> 69273dca/src/test/java/org/apache/commons/math3/ode/nonstiff/
>>> ClassicalRungeKuttaIntegratorTest.java
>>> ----------------------------------------------------------------------
>>> diff --git a/src/test/java/org/apache/commons/math3/ode/nonstiff/
>>> ClassicalRungeKuttaIntegratorTest.java b/src/test/java/org/apache/
>>> commons/math3/ode/nonstiff/ClassicalRungeKuttaIntegratorTest.java
>>> index 8136596..c527680 100644
>>> --- a/src/test/java/org/apache/commons/math3/ode/nonstiff/
>>> ClassicalRungeKuttaIntegratorTest.java
>>> +++ b/src/test/java/org/apache/commons/math3/ode/nonstiff/
>>> ClassicalRungeKuttaIntegratorTest.java
>>> @@ -310,4 +310,28 @@ public class ClassicalRungeKuttaIntegratorTest {
>>> }, 0.0, new double[] { 0.0 }, 5.0, new double[1]);
>>> }
>>>
>>> + @Test
>>> + public void testTooLargeFirstStep() {
>>> +
>>> + RungeKuttaIntegrator integ = new ClassicalRungeKuttaIntegrator(
>>> 0.5);
>>> + final double start = 0.0;
>>> + final double end = 0.001;
>>> + FirstOrderDifferentialEquations equations = new
>>> FirstOrderDifferentialEquations() {
>>> +
>>> + public int getDimension() {
>>> + return 1;
>>> + }
>>> +
>>> + public void computeDerivatives(double t, double[] y, double[]
>>> yDot) {
>>> + Assert.assertTrue(t >= FastMath.nextAfter(start,
>>> Double.NEGATIVE_INFINITY));
>>> + Assert.assertTrue(t <= FastMath.nextAfter(end,
>>> Double.POSITIVE_INFINITY));
>>> + yDot[0] = -100.0 * y[0];
>>> + }
>>> +
>>> + };
>>> +
>>> + integ.integrate(equations, start, new double[] { 1.0 }, end, new
>>> double[1]);
>>> +
>>> + }
>>> +
>>> }
>>>
>>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org
>> For additional commands, e-mail: dev-h...@commons.apache.org
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org
> For additional commands, e-mail: dev-h...@commons.apache.org
>
>
--
http://people.apache.org/~britter/
http://www.systemoutprintln.de/
http://twitter.com/BenediktRitter
http://github.com/britter
