mlpack IRC logs, 2018-05-23

Logs for the day 2018-05-23 (starts at 0:00 UTC) are shown below.

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--- Log opened Wed May 23 00:00:31 2018
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08:37 < travis-ci> manish7294/mlpack#8 (lmnn - 4851b6d : Manish): The build has errored.
08:37 < travis-ci> Change view : https://github.com/manish7294/mlpack/compare/bd8e65d22874...4851b6d6bac6
08:37 < travis-ci> Build details : https://travis-ci.com/manish7294/mlpack/builds/74196903
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09:45 < travis-ci> manish7294/mlpack#9 (lmnn - f61e947 : Manish): The build passed.
09:45 < travis-ci> Change view : https://github.com/manish7294/mlpack/compare/4851b6d6bac6...f61e947dfae0
09:45 < travis-ci> Build details : https://travis-ci.com/manish7294/mlpack/builds/74198275
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09:48 < jenkins-mlpack> Yippee, build fixed!
09:48 < jenkins-mlpack> Project docker mlpack nightly build build #327: FIXED in 2 hr 34 min: http://masterblaster.mlpack.org/job/docker%20mlpack%20nightly%20build/327/
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21:20 < gman> Hi there! I have been using mlpack KFoldCV and SimpleCV for a while and after reading the tutorials, going through the API and studying the code I still don't know for sure if CV is randomizing the dataset split or not...
21:20 < gman> ...somebody has a clue on that?
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21:51 < rcurtin> gman: hang on, let me double check
21:53 < gman> sure
21:55 < rcurtin> looking at kfold_cv_impl.hpp:300, I am pretty sure that the CV classes don't randomize the dataset split
21:56 < rcurtin> if you wanted to do that, you could call ShuffleData() from mlpack/core/math/shuffle_data.hpp beforehand
21:56 < gman> uhmm.. ok thanks for the clarification
21:56 < rcurtin> the CV code is pretty complex since it is all template metaprogramming that has to work with lots of different algorithms
21:56 < gman> yep I noticed that
21:56 < gman> I think the advantage of KFoldCV would be to actually randomize the dataset
21:57 < gman> otherwise... I have seen issues when calculating some metrics such as precision/recall
21:57 < rcurtin> I think you're completely right and that would be a nice constructor argument to add to KFoldCV
21:57 < gman> good... I will try to work on something like that and let you know if it works
21:57 < rcurtin> implementationally speaking, it would be hard to change the internals of the class itself and how it extracts the dataset, but easy to add an if(shuffle) ShuffleData(...) to the constructor
21:58 < rcurtin> sure, if you'd like to do that feel free, otherwise we can open a Github issue and I'll get to it when I have a chance (maybe tomorrow? should be easy)
21:58 < gman> cool, as you wish - I can't promise I will have it working so soon :)
21:58 < rcurtin> ok---let me go ahead and open an issue, and we can track its progress there
21:59 < gman> arma:shuffle is giving me many issues - so will try to understand why's that first
21:59 < rcurtin> yeah, arma::shuffle() will shuffle all elements, not just columns (if I am remembering right)
21:59 < rcurtin> take a look at the shuffle_data.hpp file and maybe you can use either the ShuffleData() function or see what the internal implementation of that function is and it could help
22:00 < gman> will do, thanks for the help!
22:00 < rcurtin> sure, glad that you are finding the CV code useful!
22:00 < rcurtin> if you have any issues in the future don't hesitate to ask
22:00 < gman> fantastic, thanks
22:00 < rcurtin> no problem, happy to help :)
22:02 < rcurtin> https://github.com/mlpack/mlpack/issues/1409
22:34 < zoq> ShikharJ: Do you need any help with the debug process, we can work on that part together? Starting with a really small sample is a good idea.
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23:39 < travis-ci> mlpack/mlpack#4951 (master - 949ab83 : Ryan Curtin): The build has errored.
23:39 < travis-ci> Change view : https://github.com/mlpack/mlpack/compare/0853affad63d...949ab83ef5a3
23:39 < travis-ci> Build details : https://travis-ci.org/mlpack/mlpack/builds/382917286
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--- Log closed Thu May 24 00:00:32 2018