Re: [Scikit-learn-general] Cascade Classifiers for Multiclass Problems in scikit-learn

As I understand it, Olivier is talking about another type of cascade there. There, the initial and secondary decisions are into the same set of labels. I've tried building such a generic elimination cascade, but I think the training regime could go a few different ways. For a heirarchical label ca

[Scikit-learn-general] Cascade Classifiers for Multiclass Problems in scikit-learn

Say I have a classification problem that is multiclass and characteristically hierarchical, e.g. 'edible', 'nutritious' and '~nutritious' - so it can be represented like so ├── edible│ ├── nutritious│ └── ~nutritious└── ~edible While one can get reasonable performance with classifiers that su

Re: [Scikit-learn-general] Google Summer of Code 2014

Not sure how to handle the data representation (masked arrays make sense), but you probably want to look into matrix completion. In particular, a visitor at Knewton recently discussed his experience implementing singular value projection

Re: [Scikit-learn-general] Google Summer of Code 2014

While I think collaborative filtering / recommendations may have a place in sklearn, it is true that the problem setting is a little different from most of the sklearn models. You may want to take a look into mrec (https://github.com/mendeley/mrec) where many well established CF approaches are imp

Re: [Scikit-learn-general] Google Summer of Code 2014

I looked into this once upon a time, and one of the key problems (from talking to Jake IIRC) is how to handle the "missing values" in the input array. You would either need a mask, or some kind of indexing system for describing which value goes where in the input matrix. Either way, this extra argu

[Scikit-learn-general] Google Summer of Code 2014

Hello, First of all, thanks to the scikit-learn community for guiding new developers. I'm thankful for all the help that I've got with my Pull Requests till now. I hope that this is the right place to discuss GSoC related ideas (I've idled at the scikit-learn irc channel for quite a few occasions

[Scikit-learn-general] Installation fails nosetest

Hi folks, This is my first post to scikit-learn-general. I am trying to install the package on my system. I got pretty far, but not all the way. My system has an AMD 6-core CPU. I'm running Ubuntu 13.10 64-bit, and Python 3.3. I downloaded the source files for scikit-learn 0.14. The Ubu