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[Question] Multiple class decision trees
Hey everybody, I have a question about using decision trees for multiclass classification. I'm familiar with the concept of a "One-vs-all" approach where for N classes you would learn N models, where...
View ArticleMoravec's_paradox - Evolution based explanation on why perceptual tasks are...
submitted by rrenaud [link][1 comment]
View Article[Question] Probabilities sensitive to the form of the question?
I've been reading Machine Learning - A Probabilistic Perspective by Kevin P. Murphy. Each chapter features exercises and one that seems incredibly simple has me completely baffled.Here's the...
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A List of Data Science and Machine Learning Resources [x-post Hacker News]
submitted by worldsayshi [link][1 comment]
View ArticleHelp: New to machine learning, writing a Bump Function regression algorithm
This is the first ever regression algorithm that I'm writing for practical purposes, so I'm sorry if this seems like child's play to you guys. I'm trying to write a program that models a 3D bump...
View ArticleWorking on a libSVM GUI: how to get classification border?
Hi guys,I was working on a C++ wrapper and a gui for libsvm. When it's ready it will be opensource.Right now, I can load data, plot it (if 2d), train a model and highlight the support vectors....
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[Question] Parallel implements for LASSO
Hi guys, I wonder if there exists any MapReduce-based implement for LASSO, instead of MPI-based solutions? Or if I use bagging to combine several LARS results, will it be a good idea for large-scale...
View ArticleMetaOptimize QA: The "StackOverflow" for Machine Learning
submitted by shaggorama [link][3 comments]
View ArticleUsing satellite imagery to determine pedestrian, cyclist, car, bus modeshare...
For those of you who don't know, the current state of the art in determining the number of cyclists and pedestrians utilizing the streets is to put a volunteer on a street corner, and count them. For...
View ArticleNeural network for singing voice separation?
Hi everyone -- I'm fairly fresh into machine learning and was hoping to get some guidance...I'd like to construct a proof of concept algorithm that would take an MP3 encoded song, and output two files...
View ArticleWhich machine learning algorithm would be ideal for this problem?
Any help will be much appreciated. I am already working to see how I could change my data to make it suitable for learning but unfortunately not much luck so far. submitted by girl_at_school [link][2...
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Approaches to deal with absent/null features in classification?
I'm putting together a supervised classifier, where some of the features may be absent for a subset of the data. And by absent, those features do not exists, as opposed to missing.I was wondering if...
View ArticleIs there an simple form for a relationship between correlation and...
For example, if X and Y are linearly correlated at .8, are there something like confidence intervals I can put on the classification rate obtained when threshholding X to identify Y > k?The...
View ArticleActive learning to reduce the cost and number of stored instances for...
I have been working on an "active learning" approach for jointly reducing the cost and number of labeled samples (instances) in "instance-based" methods and ensembles (specifically General Regression...
View ArticleCan anyone provide an intuitive explanation of the Restricted Boltzmann...
I'm trying to figure out how well RBMs can handle very large numbers of sparse input neurons (over >100k, but where all but 20 or 30 are set to 0). submitted by sanity [link][6 comments]
View ArticleA new reddit voting system?
With the discussions about the quality1loss2 of reddit submissions and comments, I thought about a possible way of changing the voting system. As a user, you currently have one upvote/downvote. This is...
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