Monthly Archives: November 2013

Dream Team – combining Tableau and R

November 3, 2013
By
Dream Team – combining Tableau and R

Last quarter was a bit too busy to write some new blog post because of a new job. And changing the job often come along with changing the tools you work with. That was my way to Tableau. Tableau is one of the new stars in the BI/Analytics world and definitely worth a look. The people at Tableau...

Read more »

A Rather Nosy Topic Model Analysis of the Enron Email Corpus

November 3, 2013
By
A Rather Nosy Topic Model Analysis of the Enron Email Corpus

Having only ever played with Latent Dirichlet Allocation using gensim in python, I was very interested to see a nice example of this kind of topic modelling in R.  Whenever I see a really cool analysis done, I get the … Continue reading →

Read more »

Simulating Abstract Art with R

November 3, 2013
By
Simulating Abstract Art with R

Piet Mondrian Composition with Red, Blue, Black, Yellow, and Gray (1921): An example draw from my simulation function: We're in the midst of planning our spring course on Empirical Research Methods, and as a result, I've...

Read more »

Statistical aspects of two-way cross-over studies

November 3, 2013
By

I ran into this presentation on Statistical aspects of two-way cross-over studies by Ing. Helmut Schütz (http://bebac.at). He presented some code and referred to the bear package. The bear package is menu driven, which is not my thing. I had to try and do that in R via other packages. The aim is to estimate if the...

Read more »

Les k-plus prcoches voisins :Vite, il faut se la réapproprier…

November 2, 2013
By
Les k-plus prcoches voisins :Vite, il faut se la réapproprier…

(This article was first published on Learning Data Science , and kindly contributed to R-bloggers) K-plus proches voisins Fondamentaux La notion de voisinage d'un point est assez intuitive. Une définition simple serait : une zone de l'espace qui comprend ce point. C'est une notion centrale en mathématique, particulièrement en analyse lorsqu'on souhaite unifier la notion de finitide (calcul de...

Read more »

Consumer’s Choosing an Optimal Bundle – Utility Maximization

November 2, 2013
By
Consumer’s Choosing an Optimal Bundle – Utility Maximization

# The theoretical basis of classical consumer theory lies# in utility maximization. The idea is that consumers# make consumption decisions based on choosing a bundle # of goods that will maximize individual utility.# Despite this hypothesis being large...

Read more »

Weekend Reading: Market Neutral

November 1, 2013
By
Weekend Reading: Market Neutral

I recently came across a very interesting idea at the The Problem with Market Neutral (and an Answer) post by Mebane Faber. Today I want to show how you can test such strategy using the Systematic Investor Toolbox: Mebane thank you very much for sharing this great observation and great strategy that works! I would

Read more »

What’s new in Revolution R Enterprise? Webinar November 5

November 1, 2013
By

Revolution R Enterprise 7 is a major update to Revolution Analytics' flagship predictive analytics software. Not only does it include the latest release of Open Source R (providing compatability with more than 6,000 user-contributed packages), it also adds in-Hadoop and in-database predictive modeling with big data, new statistical capabilities, and drag-and-drop workflow building via integration with Alteryx. You can...

Read more »

Some Weekend Reading

November 1, 2013
By

Just what you need - some more interesting reading! Al-Sadoon, M. M., 2013. Geometric and long run aspects of Granger causality. Mimeo., Universitat Pompeu Fabra. (Forthcoming in Journal of Econometrics.) Barnett, W. A. and I. Kalondo-Kanyama, 2013. Time-varying parameter in the almost ideal demand system and the Rotterdam model: Will the best specification please stand up? Working Paper 335, Econometric...

Read more »

Efficiency Balanced Information Criterion for Item Selection

November 1, 2013
By
Efficiency Balanced Information Criterion for Item Selection

# Han (2012) in the paper "An Efficiency Balanced Information Criterion # for Item Selection in Computerized Adaptive Testing" proposes a method# of evaluating potential items based on expected item potential information # as a function of maximum pote...

Read more »