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Posted to user@commons.apache.org by Christoph Läubrich <la...@googlemail.com.INVALID> on 2020/10/02 16:16:59 UTC
Re: [math] DerivativeStructure and erf/erfx
Thanks Gilles, I'm currently trying to dive into all of this a bit and
just wondering:
Will there still be new releases of commons-math3, or is it postponed in
favor of math4?
I'm asking this because it might be an option to add erf(x) support to
Derivative structure in math3 first (as it is not ported yet), but of
course this only makes sense if it will be released some day.
Am 19.08.20 um 23:51 schrieb Gilles Sadowski:
> Hi.
>
> Le mer. 19 août 2020 à 08:38, Christoph Läubrich
> <la...@googlemail.com.invalid> a écrit :
>>
>> Im mostly using
>>
>> - math3.analysis
>
> In view of the next major version of CM, it would be nice
> to refactor codes in that package using the JDK
> java.util.function
> package, e.g. replace
> o.a.c.m.analysis.UnivariateFunction
> with
> java.util.function.DoubleUnaryOperator
> and drop redundant utilities in
> o.a.c.m.analysis.FuncitonUtils
>
>> - math3.fitting
>> - math3.linear
>> - math3.fitting.leastsquares
>
> IMO, a way to modernize CM is to modularize it.
> A first step could consist in "fitting" and "linear" becoming
> (maven) modules.
>
> Regards,
> Gilles
>
>> And some of the common util/exception things that drip in when using the
>> above.
>>
>> Am 14.08.20 um 18:42 schrieb Gilles Sadowski:
>>> Le jeu. 13 août 2020 à 15:46, Christoph Läubrich
>>> <la...@googlemail.com.invalid> a écrit :
>>>>
>>>> Hi,
>>>>
>>>> thnaks for the information, I'm currently using the "old" commons-math3
>>>> package, would it be possible to use erf with DerivativeStructure there?
>>>
>>> Technically, the issue could be that the tools in the "o.a.c.m.special"
>>> package were not designed as those in the "o.a.c.m.analysis.function"
>>> package. And IIUC, "DerivativeStructure" builds on the latter.
>>> But that doesn't mean it cannot be done (I've not used it personally).
>>>
>>> A lot of work has been done on the "master" branch; a 3.7 release
>>> would mean backporting everything; not a trivial task and (if at all
>>> possible) it would take more time (by a tall order) than anyone is
>>> willing to devote to that library.
>>>
>>> IMHO, it's about time that we release v4.0 (which has been delayed
>>> by more than 4 years, according to when the decision has been taken
>>> to start development on that next major version).
>>>
>>>> > We are looking for volunteer maintainers for the math tools available
>>>>
>>>> for commons math in general or for "commons-numbers"?
>>>
>>> Both and more:
>>>
>>> * Commons Geometry (spun off the "o.a.c.m.geometry" package)
>>> * Commons Statistics (intended to replace the "o.a.c.m.stat" package)
>>> * Commons RNG (replacement of the "o.a.c.m.random" package, and
>>> pretty feature-complete as of v1.3).
>>>
>>>> I must confess I have only recently noticed that there is development in
>>>> commons-math-4 and might be out of date with my knowledge a bit as an
>>>> "old" math3 user :-)
>>>
>>> Which classes/packages have you been using?
>>>
>>> Gilles
>>>
>>>>
>>>> Am 13.08.20 um 15:12 schrieb Gilles Sadowski:
>>>>> Hi.
>>>>>
>>>>> Le jeu. 13 août 2020 à 12:48, Christoph Läubrich
>>>>> <la...@googlemail.com.invalid> a écrit :
>>>>>>
>>>>>> I'd like to use the org.apache.commons.math3.special.Erf with a
>>>>>> DerivativeStructure but is seems there is no pre-defined function for
>>>>>> this (like exp()...).
>>>>>>
>>>>>> So the question is, can Erf transformed inside a DerivativeStructure
>>>>>> somehow or does the DerivativeStructure need to support that function
>>>>>> directly?
>>>>>
>>>>> Please note that "Erf" has been moved to the new "Commons Numbers"
>>>>> component[1], along with the other Gamma-related functions.
>>>>> The "DerivativeStructure" is one among several utilities that still need to
>>>>> be ported (and refactored) there.[2]
>>>>>
>>>>> We are looking for volunteer maintainers for the math tools available from
>>>>> the Commons libraries. The move to more focused, smaller, components
>>>>> should hopefully simplify development...
>>>>>
>>>>> Best,
>>>>> Gilles
>>>>>
>>>>> [1] https://gitbox.apache.org/repos/asf?p=commons-numbers.git;a=tree;f=commons-numbers-gamma/src/main/java/org/apache/commons/numbers/gamma;h=cb95316a3be45ebfcf938eab63f362f59e590fca;hb=HEAD
>>>>> [2] https://issues.apache.org/jira/browse/NUMBERS-69
>
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Re: [math] DerivativeStructure and erf/erfx
Posted by Gilles Sadowski <gi...@gmail.com>.
Hello.
[Cc'ing to the "dev" ML, as this discussion belongs there.]
Le ven. 2 oct. 2020 à 18:17, Christoph Läubrich
<la...@googlemail.com.invalid> a écrit :
>
> Thanks Gilles, I'm currently trying to dive into all of this a bit
Your help is very welcome.
> and
> just wondering:
>
> Will there still be new releases of commons-math3,
The general issue of what is released is in the hand of
the "community" that is willing to support the development.
My short answer is "no", a.o. things because there hasn't
been any update to the 3.x branch while a lot of work has
gone into the 4.0 ("master") branch over the last 4 years.[1]
A community could be willing to invest in back-porting
work (but it hasn't shown up yet...).
Releasing a version 3.7 would imply that we are ready to fix
bugs filed against it. [Personally I am not.]
> or is it postponed in
> favor of math4?
>
> I'm asking this because it might be an option to add erf(x) support to
> Derivative structure in math3 first (as it is not ported yet), but of
> course this only makes sense if it will be released some day.
Why not work on the development ("master") branch?
[I recall that there have been other suggestions towards improving
the API of the "autodiff" implementation.]
There are many identified issues still to be fixed in CM, but that
shouldn't prevent us from releasing a "4.0-beta" version.
Best regards,
Gilles
[1] https://issues.apache.org/jira/projects/MATH/versions/12317577
>
> Am 19.08.20 um 23:51 schrieb Gilles Sadowski:
> > Hi.
> >
> > Le mer. 19 août 2020 à 08:38, Christoph Läubrich
> > <la...@googlemail.com.invalid> a écrit :
> >>
> >> Im mostly using
> >>
> >> - math3.analysis
> >
> > In view of the next major version of CM, it would be nice
> > to refactor codes in that package using the JDK
> > java.util.function
> > package, e.g. replace
> > o.a.c.m.analysis.UnivariateFunction
> > with
> > java.util.function.DoubleUnaryOperator
> > and drop redundant utilities in
> > o.a.c.m.analysis.FuncitonUtils
> >
> >> - math3.fitting
> >> - math3.linear
> >> - math3.fitting.leastsquares
> >
> > IMO, a way to modernize CM is to modularize it.
> > A first step could consist in "fitting" and "linear" becoming
> > (maven) modules.
> >
> > Regards,
> > Gilles
> >
> >> And some of the common util/exception things that drip in when using the
> >> above.
> >>
> >> Am 14.08.20 um 18:42 schrieb Gilles Sadowski:
> >>> Le jeu. 13 août 2020 à 15:46, Christoph Läubrich
> >>> <la...@googlemail.com.invalid> a écrit :
> >>>>
> >>>> Hi,
> >>>>
> >>>> thnaks for the information, I'm currently using the "old" commons-math3
> >>>> package, would it be possible to use erf with DerivativeStructure there?
> >>>
> >>> Technically, the issue could be that the tools in the "o.a.c.m.special"
> >>> package were not designed as those in the "o.a.c.m.analysis.function"
> >>> package. And IIUC, "DerivativeStructure" builds on the latter.
> >>> But that doesn't mean it cannot be done (I've not used it personally).
> >>>
> >>> A lot of work has been done on the "master" branch; a 3.7 release
> >>> would mean backporting everything; not a trivial task and (if at all
> >>> possible) it would take more time (by a tall order) than anyone is
> >>> willing to devote to that library.
> >>>
> >>> IMHO, it's about time that we release v4.0 (which has been delayed
> >>> by more than 4 years, according to when the decision has been taken
> >>> to start development on that next major version).
> >>>
> >>>> > We are looking for volunteer maintainers for the math tools available
> >>>>
> >>>> for commons math in general or for "commons-numbers"?
> >>>
> >>> Both and more:
> >>>
> >>> * Commons Geometry (spun off the "o.a.c.m.geometry" package)
> >>> * Commons Statistics (intended to replace the "o.a.c.m.stat" package)
> >>> * Commons RNG (replacement of the "o.a.c.m.random" package, and
> >>> pretty feature-complete as of v1.3).
> >>>
> >>>> I must confess I have only recently noticed that there is development in
> >>>> commons-math-4 and might be out of date with my knowledge a bit as an
> >>>> "old" math3 user :-)
> >>>
> >>> Which classes/packages have you been using?
> >>>
> >>> Gilles
> >>>
> >>>>
> >>>> Am 13.08.20 um 15:12 schrieb Gilles Sadowski:
> >>>>> Hi.
> >>>>>
> >>>>> Le jeu. 13 août 2020 à 12:48, Christoph Läubrich
> >>>>> <la...@googlemail.com.invalid> a écrit :
> >>>>>>
> >>>>>> I'd like to use the org.apache.commons.math3.special.Erf with a
> >>>>>> DerivativeStructure but is seems there is no pre-defined function for
> >>>>>> this (like exp()...).
> >>>>>>
> >>>>>> So the question is, can Erf transformed inside a DerivativeStructure
> >>>>>> somehow or does the DerivativeStructure need to support that function
> >>>>>> directly?
> >>>>>
> >>>>> Please note that "Erf" has been moved to the new "Commons Numbers"
> >>>>> component[1], along with the other Gamma-related functions.
> >>>>> The "DerivativeStructure" is one among several utilities that still need to
> >>>>> be ported (and refactored) there.[2]
> >>>>>
> >>>>> We are looking for volunteer maintainers for the math tools available from
> >>>>> the Commons libraries. The move to more focused, smaller, components
> >>>>> should hopefully simplify development...
> >>>>>
> >>>>> Best,
> >>>>> Gilles
> >>>>>
> >>>>> [1] https://gitbox.apache.org/repos/asf?p=commons-numbers.git;a=tree;f=commons-numbers-gamma/src/main/java/org/apache/commons/numbers/gamma;h=cb95316a3be45ebfcf938eab63f362f59e590fca;hb=HEAD
> >>>>> [2] https://issues.apache.org/jira/browse/NUMBERS-69
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Re: [math] DerivativeStructure and erf/erfx
Posted by Gilles Sadowski <gi...@gmail.com>.
Hello.
[Cc'ing to the "dev" ML, as this discussion belongs there.]
Le ven. 2 oct. 2020 à 18:17, Christoph Läubrich
<la...@googlemail.com.invalid> a écrit :
>
> Thanks Gilles, I'm currently trying to dive into all of this a bit
Your help is very welcome.
> and
> just wondering:
>
> Will there still be new releases of commons-math3,
The general issue of what is released is in the hand of
the "community" that is willing to support the development.
My short answer is "no", a.o. things because there hasn't
been any update to the 3.x branch while a lot of work has
gone into the 4.0 ("master") branch over the last 4 years.[1]
A community could be willing to invest in back-porting
work (but it hasn't shown up yet...).
Releasing a version 3.7 would imply that we are ready to fix
bugs filed against it. [Personally I am not.]
> or is it postponed in
> favor of math4?
>
> I'm asking this because it might be an option to add erf(x) support to
> Derivative structure in math3 first (as it is not ported yet), but of
> course this only makes sense if it will be released some day.
Why not work on the development ("master") branch?
[I recall that there have been other suggestions towards improving
the API of the "autodiff" implementation.]
There are many identified issues still to be fixed in CM, but that
shouldn't prevent us from releasing a "4.0-beta" version.
Best regards,
Gilles
[1] https://issues.apache.org/jira/projects/MATH/versions/12317577
>
> Am 19.08.20 um 23:51 schrieb Gilles Sadowski:
> > Hi.
> >
> > Le mer. 19 août 2020 à 08:38, Christoph Läubrich
> > <la...@googlemail.com.invalid> a écrit :
> >>
> >> Im mostly using
> >>
> >> - math3.analysis
> >
> > In view of the next major version of CM, it would be nice
> > to refactor codes in that package using the JDK
> > java.util.function
> > package, e.g. replace
> > o.a.c.m.analysis.UnivariateFunction
> > with
> > java.util.function.DoubleUnaryOperator
> > and drop redundant utilities in
> > o.a.c.m.analysis.FuncitonUtils
> >
> >> - math3.fitting
> >> - math3.linear
> >> - math3.fitting.leastsquares
> >
> > IMO, a way to modernize CM is to modularize it.
> > A first step could consist in "fitting" and "linear" becoming
> > (maven) modules.
> >
> > Regards,
> > Gilles
> >
> >> And some of the common util/exception things that drip in when using the
> >> above.
> >>
> >> Am 14.08.20 um 18:42 schrieb Gilles Sadowski:
> >>> Le jeu. 13 août 2020 à 15:46, Christoph Läubrich
> >>> <la...@googlemail.com.invalid> a écrit :
> >>>>
> >>>> Hi,
> >>>>
> >>>> thnaks for the information, I'm currently using the "old" commons-math3
> >>>> package, would it be possible to use erf with DerivativeStructure there?
> >>>
> >>> Technically, the issue could be that the tools in the "o.a.c.m.special"
> >>> package were not designed as those in the "o.a.c.m.analysis.function"
> >>> package. And IIUC, "DerivativeStructure" builds on the latter.
> >>> But that doesn't mean it cannot be done (I've not used it personally).
> >>>
> >>> A lot of work has been done on the "master" branch; a 3.7 release
> >>> would mean backporting everything; not a trivial task and (if at all
> >>> possible) it would take more time (by a tall order) than anyone is
> >>> willing to devote to that library.
> >>>
> >>> IMHO, it's about time that we release v4.0 (which has been delayed
> >>> by more than 4 years, according to when the decision has been taken
> >>> to start development on that next major version).
> >>>
> >>>> > We are looking for volunteer maintainers for the math tools available
> >>>>
> >>>> for commons math in general or for "commons-numbers"?
> >>>
> >>> Both and more:
> >>>
> >>> * Commons Geometry (spun off the "o.a.c.m.geometry" package)
> >>> * Commons Statistics (intended to replace the "o.a.c.m.stat" package)
> >>> * Commons RNG (replacement of the "o.a.c.m.random" package, and
> >>> pretty feature-complete as of v1.3).
> >>>
> >>>> I must confess I have only recently noticed that there is development in
> >>>> commons-math-4 and might be out of date with my knowledge a bit as an
> >>>> "old" math3 user :-)
> >>>
> >>> Which classes/packages have you been using?
> >>>
> >>> Gilles
> >>>
> >>>>
> >>>> Am 13.08.20 um 15:12 schrieb Gilles Sadowski:
> >>>>> Hi.
> >>>>>
> >>>>> Le jeu. 13 août 2020 à 12:48, Christoph Läubrich
> >>>>> <la...@googlemail.com.invalid> a écrit :
> >>>>>>
> >>>>>> I'd like to use the org.apache.commons.math3.special.Erf with a
> >>>>>> DerivativeStructure but is seems there is no pre-defined function for
> >>>>>> this (like exp()...).
> >>>>>>
> >>>>>> So the question is, can Erf transformed inside a DerivativeStructure
> >>>>>> somehow or does the DerivativeStructure need to support that function
> >>>>>> directly?
> >>>>>
> >>>>> Please note that "Erf" has been moved to the new "Commons Numbers"
> >>>>> component[1], along with the other Gamma-related functions.
> >>>>> The "DerivativeStructure" is one among several utilities that still need to
> >>>>> be ported (and refactored) there.[2]
> >>>>>
> >>>>> We are looking for volunteer maintainers for the math tools available from
> >>>>> the Commons libraries. The move to more focused, smaller, components
> >>>>> should hopefully simplify development...
> >>>>>
> >>>>> Best,
> >>>>> Gilles
> >>>>>
> >>>>> [1] https://gitbox.apache.org/repos/asf?p=commons-numbers.git;a=tree;f=commons-numbers-gamma/src/main/java/org/apache/commons/numbers/gamma;h=cb95316a3be45ebfcf938eab63f362f59e590fca;hb=HEAD
> >>>>> [2] https://issues.apache.org/jira/browse/NUMBERS-69
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