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Patrick Kofod Mogensen
@pkofod
I've made some changes to they way we organize the objective types. Hope people will help spot mistakes, spot things that can be deprecated easily, and so on. If everything isn't deprecated it's not the end of the world to me. I'd much rather have something "good" ready for v1.0 than have to make major changes several times post Julia v1.0 just to keep backwards compatibility. Unless some of you have access to funding that'll allow me to work on this full time ;)
Patrick Kofod Mogensen
@pkofod
I'm finalizing the NLSolversBase pr, and I am working on a new README.md, hope it is an improvement over the previous one. https://github.com/JuliaNLSolvers/NLSolversBase.jl/blob/2b961597641b5d7d51d5b3d2d3789997827829bb/README.md
Patrick Kofod Mogensen
@pkofod
look near the bottom
Patrick Kofod Mogensen
@pkofod
and happy new year!
Asbjørn Nilsen Riseth
@anriseth
Nice
Maybe include a line about OnceDifferentiable(f,g!,fg!,x0) and that value_gradient! will be the same in both cases?
Patrick Kofod Mogensen
@pkofod
Yes, and also fgh!
possibly even fj! to drive the point 105% home
Asbjørn Nilsen Riseth
@anriseth
hehe
leave no ambiguity
Patrick Kofod Mogensen
@pkofod
Happy New Year to all btw. i think we got some cool things done this year. Let learn from Chris and get some gsocers this year. Spread the word to your students!
Asbjørn Nilsen Riseth
@anriseth
Yes, 2017 got us a good way towards 1.0 :D
And 2018 may be the big year when we get constrained optimization up to speed ;)
Let's make a wish list of things, and see what may be useful for GSoC?
Christoph Ortner
@cortner
Well done both of you!
And happy new year
Patrick Kofod Mogensen
@pkofod
Just found out newton in nlsolve has been seriously broken forever! It's fixed now though...
Christoph Ortner
@cortner
That’s pretty funny :)
Asbjørn Nilsen Riseth
@anriseth
Haha, I hope that hasn't messed up too many people's nonlinear equation results
I've never bothered learning NLsolve so I've just minimized the norm of my nonlinear system in Optim the few times I've needed to solve such problems.
Patrick Kofod Mogensen
@pkofod
At least it's not the default
:]
I remember KristofferC said there was a problem with the line search something like 2 years ago
Wasn't even looking for the bug either, it just crept up when I tried to do something else
I think a lot of people end up just minimizing a merit function using an optimizer, yeah...
Patrick Kofod Mogensen
@pkofod
How's your pkg coming along btw @cortner ?
Patrick Kofod Mogensen
@pkofod
Haha, we really need to scale those residuals @anriseth
ERROR: LoadError: Search direction is not a direction of descent; this error may indicate that user-provided derivatives are inaccurate. (dphia = 36893488147419103232.000000; dphib = 231196504829087936877862843752692774819626351074237639973075555918007801355288251647092399488345473302253871527917401087654984514154178262635690272260601099070115374496974741731750405210112.000000)
look at dphib
Asbjørn Nilsen Riseth
@anriseth
Lol, is Float64 sufficient here? :laughing:
Patrick Kofod Mogensen
@pkofod
We really need to follow up on Antoine's wish for a new interface for line searches. I just tried using a line search in a non-JuliaNLSolvers-related context, and it's not easy figuring out what is what, as we sstill have a lot of outdated assumptions and inputs
Asbjørn Nilsen Riseth
@anriseth
Yep. Is it set up as an Issue in LineSearches?
Patrick Kofod Mogensen
@pkofod
I think the LineSearchResults issue is obvious and I've tried to continue the discussion
Asbjørn Nilsen Riseth
@anriseth
Is it possible to attach Google Analytics to github docs somehow?
Could be useful to see what doc pages are looked at
Patrick Kofod Mogensen
@pkofod
I guess?
You mean the documenter pages?
Asbjørn Nilsen Riseth
@anriseth
Yep
Patrick Kofod Mogensen
@pkofod
JuliaDocs/Documenter.jl#388
Asbjørn Nilsen Riseth
@anriseth
Ah, nice
Jiawei Li
@iewaij
Hey everyone think I should say hi in this chatroom, my name is Jiawei and I'll be mentored by @pkofod for Google Summer of Code to improve JuliaNLSolvers, especially LsqFit.jl. My plan is building/improving documentation and benchmarks for Optim.jl, NLsolve.jl and LsqFit.jl, and adding non-vector support and trust region method to LsqFit.jl. My coding period will start 2 weeks later and I'm super excited to work with this community. The plan still has plenty room for improvements so please let me know if you have any suggestions or feature requests and I can change my plan or pay more attention towards some part accordingly! 😄
Patrick Kofod Mogensen
@pkofod
Welcome @iewaij!
Christopher Rackauckas
@ChrisRackauckas
hi @iewaij ! Sounds like a great project.
Patrick Kofod Mogensen
@pkofod
Though maybe I should have warned you... My GSOC project had a description that was along the same lines but on Optim... and look what mess that has put me in!! ;)
Asbjørn Nilsen Riseth
@anriseth
That's great @iewaij. Getting good nonlinear least squares functionality in Julia / NLSolvers will be very useful for many users and newcomers.
A general point on documentation. I think it would be cool to try out Literate as a concept for improving documentation via tutorials / examples. Another benefit is that we can include the codes in these tutorials in the unit tests to ensure that newcomers don't "learn" from breaking code
https://github.com/fredrikekre/Literate.jl
Jiawei Li
@iewaij
@pkofod haha hope I won't need to do a whole phd for this project! @anriseth Thanks a lot for pointing out! I did hear about Literate Programming things behind latex and jupyter notebooks etc but I never thought there's a package for that! That's amazing!
Christopher Rackauckas
@ChrisRackauckas

I won't need to do a whole phd for this project!

Famous last words.

Jiawei Li
@iewaij
😂
Asbjørn Nilsen Riseth
@anriseth