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Posted to dev@commons.apache.org by Al Chou <ho...@yahoo.com> on 2005/08/09 06:46:34 UTC
Re: [math] SoC Commons-Math Status
Yes, good point, Martin.
James, please see
http://www.mail-archive.com/commons-dev@jakarta.apache.org/msg61147.html for an
example of our exercising a decision we made early in Commons Math's history
regarding code derived from _Numerical Recipes_ (in short, using _NR_ as a
source for code without getting written permission violates their license, and
their license is not compatible with the Apache License anyway).
Also please see http://jakarta.apache.org/commons/math/developers.html for
general information and guidelines for Commons Math contributors.
I strongly recommend you post whatever JUnit tests and code you currently have,
regardless of what shape it's in, either to the list or somewhere accessible
via Internet, before continuing with any more coding. At this point it is
going to be important to make sure you're not wasting your time; deriving code
from _NR_ is not compatible with (probably most if not all) open source
licenses, so it's not just an Apache Software Foundation issue.
Al
--- Henri Yandell <fl...@gmail.com> wrote:
> Especially Phil/Al as mentors.
>
> On 8/8/05, Martin Cooper <mf...@gmail.com> wrote:
> > Hmm, I'm a little concerned at the reference to Numerical Recipes. The
> > NR folks have strict limitations on how their work may be used. For
> > example, see:
> >
> > http://www.numerical-recipes.com/infotop.html#distinfo
> >
> > Can someone more familiar with this chime in on the extent to which we
> > may have issues with this, if any?
> >
> > --
> > Martin Cooper
> >
> >
> > On 8/8/05, James M Stephenson <jm...@gmail.com> wrote:
> > > Compressed Matrix class and arithmetic components are coming along, I
> > > should have a good post soon. I've got a few more methods to write for
> > > the compressed matrix class. I hope to be finished with my project on
> > > 8/21 right now including getting ripped up by the community, I really
> > > should not have done the hardest part first (The compressed matrix
> > > class). It is really proving to be difficult to come up with a
> > > completely sound method of doing it, especially one that follows along
> > > the lines of commons development, I am using the Numerical Recipes set
> > > of books as a good reference along with Cantrell's Modern Mathematical
> > > Methods for Physicists and Engineers. I will definitely have a post and
> > > a patch to discuss this week, and if all goes well, I should have the
> > > decomposer done next week midweek.
> > >
> > > Sincerely,
> > > James
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Re: [math] SoC Commons-Math Status
Posted by Phil Steitz <ph...@gmail.com>.
On 8/9/05, James M Stephenson <jm...@gmail.com> wrote:
> I was worried about using any code from Numerical Recipies, so I have
> refrained from doing so and am using it as a reference in addition to
> Cantrell's book. The only thing I am using it for is the bits of theory
> here and there within it, not the algorithms. I am developing those
> myself. The NR reference is not being used for the compressed matrix
> class, I am not using anything for that apart from Cantrell's book and
> the Lapack reference manual. I am not reusing any code or algorithms
> from either book. I will post my JUnit tests and code this evening for
> review.
>
Great! There is no problem using the NR theory sections as background,
but as discussed, we need to make sure that we do not implement the
algorithms as described there. Unless it is clear from the code
documentation, your derivation your own algorithms should also be
documented somewhere (ideally in the user guide).
Thanks,
Phil
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Re: [math] SoC Commons-Math Status
Posted by Al Chou <ho...@yahoo.com>.
Thanks, James. Looking forward to the code!
Al
--- James M Stephenson <jm...@gmail.com> wrote:
> I was worried about using any code from Numerical Recipies, so I have
> refrained from doing so and am using it as a reference in addition to
> Cantrell's book. The only thing I am using it for is the bits of theory
> here and there within it, not the algorithms. I am developing those
> myself. The NR reference is not being used for the compressed matrix
> class, I am not using anything for that apart from Cantrell's book and
> the Lapack reference manual. I am not reusing any code or algorithms
> from either book. I will post my JUnit tests and code this evening for
> review.
>
> James
>
> Al Chou wrote:
>
> >Yes, good point, Martin.
> >
> >James, please see
> >http://www.mail-archive.com/commons-dev@jakarta.apache.org/msg61147.html for
> an
> >example of our exercising a decision we made early in Commons Math's history
> >regarding code derived from _Numerical Recipes_ (in short, using _NR_ as a
> >source for code without getting written permission violates their license,
> and
> >their license is not compatible with the Apache License anyway).
> >
> >Also please see http://jakarta.apache.org/commons/math/developers.html for
> >general information and guidelines for Commons Math contributors.
> >
> >I strongly recommend you post whatever JUnit tests and code you currently
> have,
> >regardless of what shape it's in, either to the list or somewhere accessible
> >via Internet, before continuing with any more coding. At this point it is
> >going to be important to make sure you're not wasting your time; deriving
> code
> >from _NR_ is not compatible with (probably most if not all) open source
> >licenses, so it's not just an Apache Software Foundation issue.
> >
> >
> >Al
> >
> >
> >
> >--- Henri Yandell <fl...@gmail.com> wrote:
> >
> >
> >>Especially Phil/Al as mentors.
> >>
> >>On 8/8/05, Martin Cooper <mf...@gmail.com> wrote:
> >>
> >>
> >>>Hmm, I'm a little concerned at the reference to Numerical Recipes. The
> >>>NR folks have strict limitations on how their work may be used. For
> >>>example, see:
> >>>
> >>>http://www.numerical-recipes.com/infotop.html#distinfo
> >>>
> >>>Can someone more familiar with this chime in on the extent to which we
> >>>may have issues with this, if any?
> >>>
> >>>--
> >>>Martin Cooper
> >>>
> >>>
> >>>On 8/8/05, James M Stephenson <jm...@gmail.com> wrote:
> >>>
> >>>
> >>>>Compressed Matrix class and arithmetic components are coming along, I
> >>>>should have a good post soon. I've got a few more methods to write for
> >>>>the compressed matrix class. I hope to be finished with my project on
> >>>>8/21 right now including getting ripped up by the community, I really
> >>>>should not have done the hardest part first (The compressed matrix
> >>>>class). It is really proving to be difficult to come up with a
> >>>>completely sound method of doing it, especially one that follows along
> >>>>the lines of commons development, I am using the Numerical Recipes set
> >>>>of books as a good reference along with Cantrell's Modern Mathematical
> >>>>Methods for Physicists and Engineers. I will definitely have a post and
> >>>>a patch to discuss this week, and if all goes well, I should have the
> >>>>decomposer done next week midweek.
> >>>>
> >>>>Sincerely,
> >>>>James
__________________________________________________
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Re: [math] SoC Commons-Math Status
Posted by James M Stephenson <jm...@gmail.com>.
I was worried about using any code from Numerical Recipies, so I have
refrained from doing so and am using it as a reference in addition to
Cantrell's book. The only thing I am using it for is the bits of theory
here and there within it, not the algorithms. I am developing those
myself. The NR reference is not being used for the compressed matrix
class, I am not using anything for that apart from Cantrell's book and
the Lapack reference manual. I am not reusing any code or algorithms
from either book. I will post my JUnit tests and code this evening for
review.
James
Al Chou wrote:
>Yes, good point, Martin.
>
>James, please see
>http://www.mail-archive.com/commons-dev@jakarta.apache.org/msg61147.html for an
>example of our exercising a decision we made early in Commons Math's history
>regarding code derived from _Numerical Recipes_ (in short, using _NR_ as a
>source for code without getting written permission violates their license, and
>their license is not compatible with the Apache License anyway).
>
>Also please see http://jakarta.apache.org/commons/math/developers.html for
>general information and guidelines for Commons Math contributors.
>
>I strongly recommend you post whatever JUnit tests and code you currently have,
>regardless of what shape it's in, either to the list or somewhere accessible
>via Internet, before continuing with any more coding. At this point it is
>going to be important to make sure you're not wasting your time; deriving code
>from _NR_ is not compatible with (probably most if not all) open source
>licenses, so it's not just an Apache Software Foundation issue.
>
>
>Al
>
>
>
>--- Henri Yandell <fl...@gmail.com> wrote:
>
>
>>Especially Phil/Al as mentors.
>>
>>On 8/8/05, Martin Cooper <mf...@gmail.com> wrote:
>>
>>
>>>Hmm, I'm a little concerned at the reference to Numerical Recipes. The
>>>NR folks have strict limitations on how their work may be used. For
>>>example, see:
>>>
>>>http://www.numerical-recipes.com/infotop.html#distinfo
>>>
>>>Can someone more familiar with this chime in on the extent to which we
>>>may have issues with this, if any?
>>>
>>>--
>>>Martin Cooper
>>>
>>>
>>>On 8/8/05, James M Stephenson <jm...@gmail.com> wrote:
>>>
>>>
>>>>Compressed Matrix class and arithmetic components are coming along, I
>>>>should have a good post soon. I've got a few more methods to write for
>>>>the compressed matrix class. I hope to be finished with my project on
>>>>8/21 right now including getting ripped up by the community, I really
>>>>should not have done the hardest part first (The compressed matrix
>>>>class). It is really proving to be difficult to come up with a
>>>>completely sound method of doing it, especially one that follows along
>>>>the lines of commons development, I am using the Numerical Recipes set
>>>>of books as a good reference along with Cantrell's Modern Mathematical
>>>>Methods for Physicists and Engineers. I will definitely have a post and
>>>>a patch to discuss this week, and if all goes well, I should have the
>>>>decomposer done next week midweek.
>>>>
>>>>Sincerely,
>>>>James
>>>>
>>>>
>
>__________________________________________________
>Do You Yahoo!?
>Tired of spam? Yahoo! Mail has the best spam protection around
>http://mail.yahoo.com
>
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>
>
>
>
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