How can I compute the z-score for matrices in Python? Suppose I have the array: a = array([[ 1, 2, 3], [ 30, 35, 36], [2000, 6000, 8000]]) and I want to compute the z-score for each row. The solution I came up with is: array([zs(item) for item in a]) where zs is in scipy.stats.stats. Is there a...
Thank you for help. ...
Let's say that I have a problem that is basicly classification. That is, given some input and a number of possible output classes, find the correct class for the given input. Neural networks and decision trees are some of the algorithms that may be used to solve such problems. These algorithms typically only emit a single result however:...
I am trying to use IDF scores to find interesting phrases in my pretty huge corpus of documents. I basically need something like Amazon's Statistically Improbable Phrases, i.e. phrases that distinguish a document from all the others The problem that I am running into is that some (3,4)-grams in my data which have super-high idf actually ...
Is there any good reference to Algorithms that people use for rare event detection ? Also, How is the time factor taken into account ? If i have a case where successive data points tell something (t_1 to t_n) , How can one factor this into normal Machine learning scenario ? Any pointer will be appreciated. ...
I am looking for a graduation project idea in AI and machine learning field... The idea may require front-end user interface to attract users... I am thinking of how AI and machine learning can help you in daily life..? Any help/hint about new interesting ideas ? Thanks Edit: I am talking about practical ideas that may be used in re...
Which ls-svm toolbox can use in matlab? Which implementation do you recommend? ...
Hello there, so here is my problem: I have several different configuarion servers. I have different calculations (jobs); I can predict how long approximately each job will take to be caclulated. Also, I have priorities. My question is how to keep all machines loaded 99-100% and schedule the jobs in the best way. Each machine can do...
For about a year I have been thinking about writing a program that writes programs. This would primarily be a playful exercise that might teach me some new concepts. My inspiration came from negentropy and the ability for order to emerge from chaos and new chaos to arise out of order in infinite succession. To be more specific, the ...
Hi, I am trying to do some text classification with SVMs in MATLAB and really would to know if MATLAB has any methods for feature selection(Chi Sq.,MI,....), For the reason that I wan to try various methods and keeping the best method, I don't have time to implement all of them. That's why I am looking for such methods in MATLAB.Does any...
I am trying to recreate the results reported in Reducing the dimensionality of data with neural networks of autoencoding the olivetti face dataset with an adapted version of the MNIST digits matlab code, but am having some difficulty. It seems that no matter how much tweaking I do on the number of epochs, rates, or momentum the stacked R...
I'm programming a software agent to control a robot player in a simulated game of soccer. Ultimately I hope to enter it in the RoboCup competition. Amongst the various challenges involved in creating such an agent, the motion of it's body is one of the first I'm facing. The simulation I'm targeting uses a Nao robot body with 22 hinge...
Hi, I need a somehow descriptive example showing how to do a 10-fold SVM classification on a two class set of data. there is just one example in the MATLAB documentation but it is not with 10-fold. Can someone help me? ...
Does anyone know if there is a library for the iPhone that includes a Naïve Bayes Classifier? ...
I am running a physics simulation and applying a set of movement instructions to a simulated skeleton. I have a multiple sets of instructions for the skeleton consisting of force application to legs, arms, torso etc. and duration of force applied to their respective bone. Each set of instructions (behavior) is developed by testing its ef...
Hi. I've set up an ANN with back-propagation as a book recommendation system. I only have one hidden layer in the network, and both the input and the output layers are books, since you should be able to enter a book and receive more book recommendations. I already have a lot of data about users and their ratings (1 to 5) for books. I...
Hi, I would like to know of open source tools (for java/python) which could help me extract semantic & stylistic features from text. Examples of semantic features would be adjective-noun ratio, a particular sequence of part-of-speech tags (adjective followed by a noun: adj|nn) etc. Examples of stylistic features would be number of uniqu...
I've got about 300k documents stored in a Postgres database that are tagged with topic categories (there are about 150 categories in total). I have another 150k documents that don't yet have categories. I'm trying to find the best way to programmaticly categorize them. I've been exploring NLTK and its Naive Bayes Classifier. Seems li...
Suppose you have a set of nodes connected into a tree structure with one root node and any node may have any number of child nodes. You can only traverse the tree starting at the root node or from your current position along direct connections. I.e., no random access to a specific node, but the structure of the graph is already known an...
I have an idea for a project that I wanted some advice/pointers on. I am planning to write an application to automatically parse expense receipts in JPG format and automatically extract the amount and also categorize using some learning algorithm. Is this at all doable? What libraries are available to parse jpg files to extract textual...