| --- Log opened Fri Apr 26 00:00:29 2013 | ||
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| Yanglittle | hey, does any examples output the testdat's posterior probability in python_modular? | 06:13 |
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| foulwall | Hi sonney2k | 08:58 |
| foulwall | I saw the idea "mloss.org and mldata.org integration" is also available. I think I can do some work on that after I finish the demos. | 09:02 |
| sonne|work | foulwall: I think demos is more work than you expect :) | 09:06 |
| sonne|work | But sure we could also allow uploads of *small* data sets for the demo | 09:07 |
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| foulwall | sonne|work: Maybe after the GSoC I'll help that. | 09:08 |
| foulwall | sonne|work: yeah, some demos will need bigger data set | 09:09 |
| sonne|work | foulwall: cheng and me would be happy if you do... | 09:10 |
| foulwall | sonne|work: I love shogun, so just at you service, meanwhile I can get myself trained in developing them. | 09:13 |
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| Yanglittle | hey, LibSVM can map the distance-from-margin into probalilities, does shogun do ? | 09:52 |
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| @HeikoS | Yanglittle, hi, yes we can do this | 10:51 |
| @HeikoS | check scores_to_probabilities of BinaryLabels | 10:52 |
| @HeikoS | there is also an example in libshogun | 10:52 |
| @wiking | HeikoS: what bug? | 10:57 |
| @wiking | #948 | 10:57 |
| @wiking | ? | 10:57 |
| @iglesiasg | wiking, HeikoS : hey guys, one thing that I don't quite understand regarding the randomness issue with the tests | 11:01 |
| @iglesiasg | wiking: it fails across platforms/archs because we are relying too much on the seed right? | 11:02 |
| @wiking | not about seed | 11:02 |
| @wiking | it's about RNG | 11:02 |
| @iglesiasg | wiking: then? | 11:02 |
| @wiking | it's not the same accross platforms | 11:02 |
| @iglesiasg | wiking: ok but say | 11:02 |
| @wiking | hence seeded RNG won't be the same either | 11:02 |
| @iglesiasg | if it is because we are relying on the seed I understand | 11:03 |
| @iglesiasg | otherwise, I don't | 11:03 |
| @iglesiasg | because if we are generating numbers from say an interval [0,1] | 11:03 |
| @HeikoS | wiking: ? | 11:03 |
| @iglesiasg | why does it make a difference how are they generated as long as they are in that interval? | 11:03 |
| @wiking | iglesiasg: because they are not the same exact number? :) | 11:04 |
| @HeikoS | iglesiasg: we save results to files, then compare against them | 11:04 |
| @HeikoS | to any random stuff will kill us | 11:04 |
| @iglesiasg | wiking: then, we are relying too much on the seed | 11:04 |
| @HeikoS | iglesiasg: some methods are random | 11:04 |
| @wiking | iglesiasg: with seed(x) in the code u suppose that the random will be always the same | 11:04 |
| @iglesiasg | wiking: i.e. we are generating "random numbers" that are not random actually | 11:04 |
| @HeikoS | no way around that | 11:04 |
| @iglesiasg | wiking: ok, I understand | 11:04 |
| @HeikoS | data doesnt have to be, but other things have to be | 11:04 |
| @wiking | which is true until u r using the same system | 11:04 |
| @HeikoS | wiking: what was with the bug? | 11:04 |
| @wiking | HeikoS: nada realised | 11:04 |
| @iglesiasg | wiking: then it doesn't make sense to me to face problems for that | 11:04 |
| @HeikoS | what if we have our own random machine in shogun? | 11:05 |
| @HeikoS | would that solve it? | 11:05 |
| @iglesiasg | it is just that the tests don't work on random data | 11:05 |
| @HeikoS | what about python? | 11:05 |
| @HeikoS | iglesiasg: its not only that data | 11:05 |
| @wiking | HeikoS: python uses system rng afaik | 11:05 |
| @iglesiasg | HeikoS: yeah, it is also internally like in CV you said | 11:05 |
| @iglesiasg | right? | 11:05 |
| @HeikoS | wiking: so even python is not reproducible? | 11:05 |
| @wiking | HeikoS: and anyhow now we are failing exactly with python_modular ;P | 11:05 |
| @HeikoS | iglesiasg: exactly | 11:05 |
| @HeikoS | wiking: so we need a random machine in shogun that can produce everything | 11:06 |
| @HeikoS | as far as i know we mainly use normal and uniform samples from python | 11:06 |
| @HeikoS | we have both in shogun | 11:06 |
| @HeikoS | just need to use them instead of the numpy methods then | 11:07 |
| @HeikoS | or we change our approach | 11:07 |
| @lisitsyn | HeikoS: wiking: sonne|work: iglesiasg: please check mail | 11:07 |
| @HeikoS | that is, only use fixed data | 11:07 |
| @HeikoS | dont test random methods but whether results make sense | 11:07 |
| @HeikoS | I did that a while ago but its also problematic | 11:07 |
| @HeikoS | like x-val results | 11:07 |
| @HeikoS | you can define an interval of what you expect | 11:08 |
| @HeikoS | but no guarantee | 11:08 |
| @iglesiasg | lisitsyn: it is looking good :) | 11:09 |
| @HeikoS | lisitsyn: dito | 11:09 |
| @lisitsyn | HeikoS: is it bad or good? | 11:10 |
| @lisitsyn | :D | 11:10 |
| @iglesiasg | HeikoS: rather than using our random machine | 11:11 |
| @iglesiasg | HeikoS: I would enable the possibility of setting randomly generated values as the deafult option, but in tests we set that from outsite | 11:11 |
| @iglesiasg | outside* | 11:11 |
| @iglesiasg | that would be for the parts that use random numbers internally, e.g. CV | 11:12 |
| @lisitsyn | wiking: I like your font | 11:12 |
| sonne|work | HeikoS, wiking, iglesiasg - we need a portable random number generator | 11:12 |
| @wiking | lisitsyn: which? :)))) | 11:12 |
| @wiking | lisitsyn: i think i've fixed it | 11:12 |
| sonne|work | eigen3? | 11:12 |
| @lisitsyn | wiking: in the issue you just created | 11:12 |
| @lisitsyn | wiking: I just read a mail and whoa! | 11:13 |
| @iglesiasg | sonne|work: I think the solution can be a bigger problem than the original one :) | 11:13 |
| @wiking | lisitsyn: hahahah yeah | 11:13 |
| @lisitsyn | sonne|work: eigen3 doesn't have great random | 11:13 |
| @wiking | lisitsyn: github took it's work seriously with highlighting :)) | 11:13 |
| @wiking | sonne|work: afaik openssl/ssh will have one ;) | 11:13 |
| @lisitsyn | sonne|work: C++11 has portable random stuff | 11:14 |
| @lisitsyn | :D | 11:14 |
| @wiking | sonne|work: and those ones are for sure portable | 11:14 |
| @wiking | sonne|work: it's now matter of teste | 11:14 |
| @wiking | *taste | 11:14 |
| @wiking | to depend shogun on openssl | 11:14 |
| @wiking | or just cut out the rng from openssl | 11:15 |
| @lisitsyn | are we going to use C++11 btw? | 11:15 |
| @lisitsyn | :D | 11:15 |
| @wiking | i'd rather go with simple dependency, as nowadays a system w/o openssl is pretty weird... unless it's not connected to the network :P | 11:17 |
| @HeikoS | true ssl is easy to depend on | 11:21 |
| @HeikoS | how about c++11? | 11:21 |
| @HeikoS | what would that do to us? | 11:21 |
| @lisitsyn | HeikoS: I am not sure it is really portable but I just ask if we are going to use new standard | 11:22 |
| @HeikoS | lisitsyn: different question, lets solve the other one first :) | 11:23 |
| @HeikoS | if it *is* portable, we could do it | 11:23 |
| @HeikoS | but what would it do to us? | 11:23 |
| @HeikoS | whats needed to use it? | 11:23 |
| @lisitsyn | HeikoS: --std=c++0x IIRC | 11:24 |
| @lisitsyn | HeikoS: starting from gcc 4.6 or 4.7 | 11:24 |
| @HeikoS | lisitsyn: have you tried what happens then? | 11:24 |
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| @lisitsyn | HeikoS: happens like? | 11:31 |
| @lisitsyn | HeikoS: once you use newer standard you can use new headers | 11:32 |
| @lisitsyn | like shared_ptr or these rng things | 11:32 |
| @lisitsyn | HeikoS: ah and std collections use move semantics | 11:33 |
| @HeikoS | lisitsyn: I mean, does it compile? | 11:33 |
| @wiking | HeikoS: it does | 11:33 |
| @lisitsyn | HeikoS: yes of course, back compatibility is a must | 11:33 |
| @HeikoS | then why not use it? | 11:33 |
| @wiking | at least with clang yes | 11:33 |
| @lisitsyn | HeikoS: it can get into troubles though | 11:34 |
| @lisitsyn | HeikoS: as I know shared libraries are not compatible | 11:34 |
| @HeikoS | lisitsyn: I see | 11:35 |
| @wiking | lisitsyn: do you know an easy way to generate a skeleton of a polygon? | 11:35 |
| @lisitsyn | wiking: generate? | 11:35 |
| @lisitsyn | wiking: http://upload.wikimedia.org/wikipedia/commons/a/ab/StraightSkeletonDefinition.png like that? | 11:36 |
| @wiking | lisitsyn: yeah similar but my polygon is a simple 2D one | 11:37 |
| @lisitsyn | I don't know the algorithm | 11:38 |
| @wiking | yeah i'm trying to find one as well atm... | 11:41 |
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| gsomix | hello | 11:43 |
| gsomix | sonne|work: sonney2k: there? | 11:43 |
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| @wiking | lisitsyn: anybody is working on RandomizedPCa and fast k-Means? | 11:51 |
| @lisitsyn | wiking: no, probably no | 11:51 |
| @lisitsyn | wiking: I wanted to but swamped | 11:51 |
| @wiking | ok | 11:52 |
| @wiking | i took random forest | 11:52 |
| @lisitsyn | wiking: want to participate in gsoc? ;) | 11:52 |
| @lisitsyn | :D | 11:52 |
| @wiking | lisitsyn: heheh can i ? | 11:52 |
| @wiking | :) | 11:52 |
| @lisitsyn | wiking: are you eligible at all? | 11:53 |
| @wiking | lisitsyn: i've realised that yes :) | 11:53 |
| @lisitsyn | hah | 11:53 |
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| @wiking | btw: for CRF we could use http://www.chokkan.org/software/crfsuite/ | 11:54 |
| @wiking | it's bsd license | 11:54 |
| * wiking just looking through the development issues on github | 11:55 | |
| @wiking | btw isn't #943 fixed? | 11:57 |
| @wiking | json serialization ? | 11:57 |
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| @wiking | btw opencv has RNG as well http://docs.opencv.org/modules/core/doc/operations_on_arrays.html?highlight=rng#rng | 13:01 |
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| @iglesiasg | interesting | 13:04 |
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| gsomix | sonney2k: are you there? | 20:32 |
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| poojits | I am interested in "Interface and develop the general quadratic solver library libqp" project for GSOC, but there is no preliminary task for this in the issue list on github. Should I get in touch with mentor Vojtech Franc directly? | 22:28 |
| @lisitsyn | poojits: yes | 22:29 |
| poojits | xfrancv@cmp.felk.cvut.cz is his university email address. Is this okay? | 22:30 |
| @lisitsyn | poojits: yes totally | 22:30 |
| poojits | thanks alot. | 22:31 |
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| --- Log closed Sat Apr 27 00:00:29 2013 | ||
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