IRC logs of #shogun for Thursday, 2017-01-19

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--- Log opened Thu Jan 19 00:00:47 2017
CaBaanyone up?00:06
CaBawiking, HeikoS?00:06
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@sukeyNew Commit "some minor fixes for Random Forest" to shogun-toolbox/shogun by vigsterkr: https://github.com/shogun-toolbox/shogun/commit/48fabe18e9c9735b8fab4a2e082c00a3f334bdd301:57
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@sukeyNew Commit "some minor fixes for Random Forest" to shogun-toolbox/shogun by vigsterkr: https://github.com/shogun-toolbox/shogun/commit/dadd09e05f34981ec94b160c40a2c07d471849b602:32
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travis-ciit's Viktor Gal's turn to pay the next round of drinks for the massacre he caused in shogun-toolbox/shogun: https://travis-ci.org/shogun-toolbox/shogun/builds/19325096803:19
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@sukeyNew Commit "Merge branch 'feature/KernelOMP' into develop" to shogun-toolbox/shogun by vigsterkr: https://github.com/shogun-toolbox/shogun/commit/db05cba946f4b163ff57097832e8391cc0b1c8e703:22
--- Log closed Thu Jan 19 03:38:45 2017
--- Log opened Thu Jan 19 03:38:53 2017
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@sukeyNew Commit "Update MS Dirent implementation" to shogun-toolbox/shogun by vigsterkr: https://github.com/shogun-toolbox/shogun/commit/36c124481d7e1b6c6b7eb1e1bc3b46d108b791e703:53
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travis-ciit's Viktor Gal's turn to pay the next round of drinks for the massacre he caused in shogun-toolbox/shogun: https://travis-ci.org/shogun-toolbox/shogun/builds/19325837304:11
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shogun-buildbotbuild #98 of deb4 - python3 is complete: Failure [failed test python modular]  Build details are at http://buildbot.shogun-toolbox.org/builders/deb4%20-%20python3/builds/98  blamelist: Viktor Gal <viktor.gal@maeth.com>04:11
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travis-ciit's Viktor Gal's turn to pay the next round of drinks for the massacre he caused in shogun-toolbox/shogun: https://travis-ci.org/shogun-toolbox/shogun/builds/19326063704:50
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CaBahey HeikoS13:23
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CaBayou guys need better internet connectivity ;)13:38
@HeikoShehe ;)13:39
@HeikoSwell life, work and all that is also going on13:39
CaBaHeikoS: :)13:39
CaBaHeikoS: can i ask you a quick question nontheless? :P13:39
CaBaHeikoS: i have a custom string kernel that currently works on StringFeatures<char>... now i want to enhance it's performance by precomputing some indices over those sequences and use them instead of the sequences itself in ::compute().13:41
@HeikoSsure13:41
@HeikoSCaBa: I think for that you would have to modify the code a bit13:41
CaBaHeikoS: my problem is - i only realized afterwards that the lhs and rhs members of CKernel are *not* exclusively modified through CKernel::init() - i thought that was the only place where i had to update the indices13:42
CaBaHeikoS: i was thinking... i should precompute everything and then have a kernel that works on the indices only... but those are complex objects. is there a CFeatures class for that?13:43
CaBaHeikoS: or how about CStringFeatures<T>? Does that actually work for *any* T, as long as compute() can handle T?13:44
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CaBaHeikoS: still got my last 3 msgs?14:13
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CaBaHeikoS: ping18:19
@HeikoSjo18:19
CaBaHeikoS: tell me... SGString, SGStringList - they are not implemented for any type T?18:20
CaBalike - the generic version is non functional?18:20
@HeikoSCaBa: only for basic types I think18:20
@HeikoSbut not sure18:20
CaBa>.<18:20
@HeikoSwhat type did you try?18:20
CaBamy own class18:20
@HeikoSah18:20
@HeikoSreason why you do that?18:21
CaBawell... i want to use the index data structures as features and CKernel::compute() on that...18:21
@HeikoSmmh18:21
@HeikoSI see18:21
CaBaHeikoS: is there any feature type that can take "whatever" per sample and let me handle the kernel function myself in ::compute() and that's it?18:22
@HeikoSI wanted to kick out supporting strings of vectors/matrices a long time ago18:22
@HeikoSnope that is not there18:23
@HeikoSI mean it can be added18:23
CaBa>.<18:23
@HeikoSand precomputing the kernel?18:23
@HeikoSCaBa: your think would be a hack18:23
CaBawhat's the precomputing the kernel option?18:23
CaBaCCustomKernel?18:24
@HeikoSas the kernel behaves differently based on what feature type is in there (at least in the current way we do this)18:24
@HeikoSCaBa: yes precomputing the matrix18:24
@HeikoSand using that18:24
@HeikoSvia CustmKernel18:24
CaBaHeikoS: is CustomKernel fully functional? can i use it in CCombinedKernel?18:25
@HeikoSeven works with cross-validation18:25
@HeikoSCaBa: I did that once, but it is a few years ago18:25
CaBaHeikoS: ok, so subsetting works in CCustomKernel?18:25
@HeikoSyes18:25
@HeikoSbut xvalidation and custom kernel AND combined kernel18:25
@HeikoSI dont know18:25
@HeikoSprobably not18:25
@HeikoSI think I wrote an example for this at some point18:26
@HeikoSand added the feature to the news18:26
@HeikoSbut that must be 2011 or so18:26
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CaBaHeikoS: for custom kernel you mean?18:27
@HeikoScustom kernel xvalidation18:29
@HeikoSand also custom kernel and combined kernel (I think)18:29
@HeikoSAll of this stuff is quite useful to sort out generally18:29
CaBaHeikoS: so maybe it works alltogether?18:29
@HeikoSso we would be quite happy to have that18:29
@HeikoSI mean give it a try18:29
@HeikoSif it runs, I am sure it does sensible things18:29
CaBaHeikoS: so with customkernel there is nothing i need to do other than compute the SGMatrix<> and construct CCustomKernel(matrix)?18:32
CaBaHeikoS: does it still handle normalization through set_normalizer()?18:32
CaBaor do i have to do that beforehand, too?18:32
@HeikoSbefore18:32
@HeikoSyou can just pass a CKernel in the constructor of CCustomKernel I think18:32
@HeikoSand it does the job for you18:32
CaBawhat do you mean?18:33
CaBawhat CKernel should i pass?18:33
@HeikoSany shogun kernel18:34
@HeikoSbut matrix is fine as well18:34
CaBaHeikoS: so can it handle the normalization for me?18:34
@HeikoSnope18:34
@HeikoSit just stores numbers18:34
@HeikoS(it might but better day no for now)18:35
CaBayee, i should have compiled every now and then... took me a full day of implementation to realize that SGString<T> won't compile for any 'T'18:36
@HeikoSoh yes, alwayw compile all the time18:36
@HeikoSuse ccache to make it fast18:36
CaBai'm just compiling my own tool, that's just 10 compilation units or so :P18:37
@HeikoSah i see18:37
@HeikoSokok18:37
CaBa:'(18:38
CaBawell here we go, attempt #3 with CCustomKernel...18:38
@HeikoSlet me know how it gues18:38
@HeikoSshare results if you  make improvements18:38
CaBaHeikoS: hmmm - so normally normalization would be applied on every subset during x-val, right?18:41
@HeikoSI think that is what is done18:41
@HeikoSbut better check the code18:42
CaBaHeikoS: that cannot be achieved with a pre-computed and pre-normalized matrix if the customkernel cannot do it18:42
@HeikoSyep18:42
@HeikoStrue18:42
@HeikoSvery true18:42
@HeikoSso then no normalisation18:42
@HeikoSin that context18:42
@HeikoSor the custom kernel does that on its subsets18:42
@HeikoSbut that I know it doesnt yet (would be easy to add)18:42
CaBa:(18:45
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@besser82lisitsyn, you there?21:51
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CaBaHeikoS: welcome home :P23:29
--- Log closed Fri Jan 20 00:00:49 2017
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