Re: [Scikit-learn-general] Why don't we support Neural Network Algorithms?

2015-05-07 Thread Boyuan Deng
FYI, in April a project called scikit-neuralnetwork came into existence. It's a library wrapping Pylearn2 and providing a scikit-learn compatible interface. https://github.com/aigamedev/scikit-neuralnetwork As others have stated, there are already some nice Python neural network libraries

Re: [Scikit-learn-general] [GSoC 2015] Cross-validation and Meta-Estimators for semi-supervised learning

2015-03-25 Thread Boyuan Deng
2015, at 19:08, Boyuan Deng bryanhsud...@gmail.com wrote: Hi Andreas: when I think there is a closed form solution Yes, I remember that in some paper they first give the analytical solution to the optimization problem, and then prove that it's the same result that iterative version

Re: [Scikit-learn-general] [GSoC 2015] Cross-validation and Meta-Estimators for semi-supervised learning

2015-03-24 Thread Boyuan Deng
into that, too? If you have other related ideas, feel free to include them as well. Best, Andy On 03/22/2015 05:47 PM, Boyuan Deng wrote: Hi all: This is the link to my proposal for the Cross-validation and Meta-estimators for Semi-supervised Learning topic: https://docs.google.com/document

Re: [Scikit-learn-general] [GSoC 2015] Cross-validation and Meta-Estimators for semi-supervised learning

2015-03-24 Thread Boyuan Deng
, too bad it’s not 3 months ago, I could have met you in Saarbruecken, I was just next door! Hope my comments can help strengthen your proposal, Yours, Vlad On 24 Mar 2015, at 19:08, Boyuan Deng bryanhsud...@gmail.com wrote: Hi Andreas: when I think there is a closed form solution Yes

Re: [Scikit-learn-general] Pearson Correlation Similarity Measure

2015-03-23 Thread Boyuan Deng
Hi Vinayak: scipy.stats implemented pearsonr() like that because it's a statistics routine. It treats 0 in the input data as indeed value 0. But in the context of recommender systems, unrated is different from score 0 (though we usually use 0 to represent unrated when score must be

Re: [Scikit-learn-general] Pearson Correlation Similarity Measure

2015-03-22 Thread Boyuan Deng
Hi Vinayak: I remember there is an off-the-shelf function in scipy.stats called pearsonr. You don't have to implement it on your own. Boyuan On 03/22/2015 01:21 PM, Vinayak Mehta wrote: Hello everyone! I was recently working on a simple movie recommender system in which I calculated the

Re: [Scikit-learn-general] [GSoC 2015] Cross-validation and Meta-Estimators for semi-supervised learning

2015-03-22 Thread Boyuan Deng
to show your practical abilities to contribute to the project so that core developers become familiar with your work. I see you have started to do so at #4409; something that involves testing and/or documentation would be ideal. - Joel On 19 March 2015 at 09:30, Boyuan Deng bryanhsud