Open in new window / Try shogun cloud
--- Log opened Fri Jun 27 00:00:50 2014
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shogun-buildbotbuild #734 of nightly_all is complete: Failure [failed compile test]  Build details are at http://buildbot.shogun-toolbox.org/builders/nightly_all/builds/734  blamelist: jiaolong <jiaolongxu@gmail.com>, Sergey Lisitsyn <lisitsyn.s.o@gmail.com>, tklein23 <tklein23@users.noreply.github.com>, Heiko Strathmann <heiko.strathmann@gmail.com>, Saurabh03:05
shogun-buildbot<saurabh.mahindre@gmail.com>, Abhijeet <abhijeetkislay@gmail.com>, khalednasr <k.nasr92@gmail.com>03:05
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shogun-buildbotbuild #838 of nightly_default is complete: Failure [failed notebooks]  Build details are at http://buildbot.shogun-toolbox.org/builders/nightly_default/builds/838  blamelist: jiaolong <jiaolongxu@gmail.com>, Sergey Lisitsyn <lisitsyn.s.o@gmail.com>, tklein23 <tklein23@users.noreply.github.com>, Heiko Strathmann <heiko.strathmann@gmail.com>, Saurabh07:19
shogun-buildbot<saurabh.mahindre@gmail.com>, Abhijeet <abhijeetkislay@gmail.com>, khalednasr <k.nasr92@gmail.com>07:19
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lambdaywiking: there?09:27
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wikinglambday: now yes10:44
lambdaywiking: for feature selection stuff that I am working on... I need to add get_num_features() in the CFeatures itself... so I currently planned to put this as virtual int32_t get_num_features() const; which in the base class returns 0..10:45
lambdaywiking: what I wanted to ask.. is that does num_features make sense for LatentFeatures?10:45
lambdaywiking: or should it just work with base class method and we say that feature selection is not possible with this!10:46
wikinglambday: mmmm10:51
wikingCFeatures should never have get_num_features10:52
wikingsorry but that's a bad approach10:52
wikingcould you try again that part10:52
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lambdaywiking: yeah but if we want feature selection stuffs to work with generic CFeatures class, then that's not possible unless we have that get_num_features() thing10:53
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lambdayHeikoS2: hi!13:49
HeikoS2lambday:  hi there!13:49
lambdayHeikoS2: I bumped into an issue regarding get_num_features()13:50
HeikoS2lambday: currently teaching, but let me know whats up!13:50
HeikoS2lambday: which is?13:50
lambdayHeikoS2: this get_num_features() is needed for feature selection stuffs.. but that's only available for a few implementations of CFeatures13:50
lambdayHeikoS2: so when working with the base CFeatures, we cannot have that13:51
HeikoS2lambday: ah really?13:51
HeikoS2lambday: which are the classes for thich it is available13:51
lambdayHeikoS2: I explained the issue in a mail... sonney2k suggested that get_num_features() is not in the base for the best reason13:51
HeikoS2is it for string features?13:51
lambdayHeikoS2: string, dense, sparse, streaming dense, streaming sparse, hashed doc etc13:52
lambdayHeikoS2: wiking also suggested the same thing.. it might not be the best idea to put get_num_features() in the base13:52
lambdayHeikoS2: we can always check if the provided features supports this.. via get_feature_type() and then typecasting13:53
HeikoS2lambday: ok I see13:53
HeikoS2lambday: ok that seems reasonable13:53
HeikoS2mmmh13:53
HeikoS2supports_features or something13:53
lambdayHeikoS2: umm... that's confusing, no?13:54
lambdayHeikoS2: anyway.. ttyl when you're free :)13:56
HeikoS2lambday: yeah sorry, i am very open to suggestions, so let me know your thoughts13:58
lambdayHeikoS2: does it make sense to put those features that supports num_features under another subclass of CFeatures, then feature selection works with that class instead13:59
lambdayHeikoS2: otherwise with typecasting the whole thing sounds horrible!13:59
HeikoS2lambday: yeah that would be a good idea14:00
lambdayfor each of the classes (which supports num_features) we gotta use casted features!14:00
HeikoS2lambday: in fact, this might also be good for numerical features14:00
HeikoS2lambday: maybe this can be the same?14:00
lambdayHeikoS2: umm.. how about string features?14:00
lambdayHeikoS2: let me check quickly14:01
HeikoS2lambday: what are the variables in string features even?14:01
HeikoS2lambday: not clear to me14:01
lambdayHeikoS2: err... not much idea! may be the letters in a string??14:01
lambdaysonney2k: ^14:01
lambdayHeikoS2: there are 10 subclasses of CFeatures which has get_num_features()14:04
lambdayHeikoS2: I think your supports_features idea is the way to go14:05
lambdayHeikoS2: but if we can manage a CNumericalFeatures base for these.. then feature selection can work with that!14:06
* lambday thinking14:06
lambdaydo we intend to perform feature selection for features other than numerical features? :/ if not, then in feature selection we can work with CNumericalFeatures only14:07
@wikinglambday: why not only dotfeatures?14:08
@wikingi mean there's a very good reason why CFeatures has no get_num_features14:08
lambdaywiking: yeah I totally agree14:09
lambdaywiking: but the CDotFeatures class itself doesn't have get_num_features()14:09
@wikingmmm dig deeper then :P14:10
@wikingi mean go for a lower class14:10
lambdaywiking: let me check which subclass of CDotFeatures has this missing14:10
lambdaywiking: yeah14:10
lambdaywiking: oh but you think that we can add that SG_WARNING thingi in the CDotFeatures itself, right?14:10
@wikingno14:10
@wikingplease do not expose an api14:10
@wikingthat has no meaning at a given level14:11
lambdaywiking: alright.. agreed14:11
lambdaywiking: so, ideally if we can put all those subclasses of CDotFeatures under another layer of abstraction, say, C<Something>Features, which defines the get_num_features(), then we're fine14:11
lambdayrest of the CDotFeatures won't have it14:12
@wikingmmm maybe the abstraction is wrong  yeah14:12
@wikingand maybe its not the best option to add another abstraction layer14:12
@wikingbut refactor the abstraction14:12
@wikingthis should be investigated14:12
@wikingbut surely having functionX() {SG_NOTIMPLMENTED; } is a very bad approach14:12
lambdaywiking: I am quickly checking which subclass of CDotFeatures doesn't have get_num_features()... if it turns out that all the subclasses have it, then we can move this one level up to CDotFeatures14:13
@wikingif it's not implemented, i.e. it has no meaning at a given abstraction class14:13
lambdaywiking: yeah totally agreee!14:13
@wikingthen it should never be implemented there14:13
lambday20 subclasses of CDotFeatures!14:14
lambdayI'm screwed!14:14
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lambdaywiking: under CDotFeatures, only CDenseFeatures and CSparseFeatures has get_num_features()14:28
lambdaywiking: does it make sense to put this under a more generic CNumericalFeatures? as in, CDotFeatures <-- CNumericalFeatures <-- CDenseFeatures | CSparseFeatures14:29
lambdayand then in feature selection, we work with CNumericalFeatures instead?14:29
lambdayHeikoS2: ^14:29
lambdaysonney2k: ^14:30
lambdayalthough, we will miss streaming dense and streaming sparse with this14:31
@wikinglambday: the thing is that string features can have that as well no? :)14:40
@wikingand even more you'd like to have feature selection for stringfeatures as well14:40
lambdaywiking: ah I see14:40
lambdaywiking: but string features is not under dot...14:40
lambdaywiking: so there is no way we can unify this thing14:41
@wikingthere is way :)14:41
@wikingit's just a quite deep refactor14:41
lambdaywiking: well, with CStringFeatures, num_features is not defined14:45
lambdaywiking: I mean, different feature vectors are of different length... how does one does feature selection for this? :-/14:46
lambdaydo*14:46
@wikinglambday: btw sonney2k has a point...14:48
lambdaywiking: dense/sparse?14:48
@wikingy14:50
lambdaywiking: could you please have a look at the class design?14:57
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@wikinglambday: could u use some webservice for this?15:08
@wikinglambday: http://asciiflow.com/15:08
lambdaywiking: checking15:08
lambdaywiking: ah.. I think it cannot import dia..15:09
lambdaywiking: wait I am making one from scratch then15:09
@wikinglambday: http://stackoverflow.com/questions/6877121/is-there-a-free-browser-based-uml-modelling-tool15:10
@wikingcheck these services then15:10
lambdaywiking: okies... thanks :)15:10
lambdaywiking: writing comments are not possible with these! I attached a png also... could you please have a look at that? in case you can't open the dia file15:19
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yorkerlin@HeikoS Please merge the lbfgs first so that I can send two PRs for dual KL method.  https://github.com/shogun-toolbox/shogun/pull/233715:31
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travis-ci[travis-ci] it's khalednasr's turn to pay the next round of drinks for the massacre he caused in khalednasr/shogun: http://travis-ci.org/khalednasr/shogun/builds/2861598720:45
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thoralfHey.23:41
--- Log closed Sat Jun 28 00:00:51 2014