2684 search results for "map"

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 »

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 »

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 »

Quarterback Wonderlic Scores by Institution (Academic) Strength

November 1, 2013
By
Quarterback Wonderlic Scores by Institution (Academic) Strength

## geom_smooth: method="auto" and size of largest group is <1000, so using## loess. Use 'method = x' to change the smoothing method. I remember my dad telling me that when he was at Northwestern in the mid-70s, the team...

Read more »

Real-time streaming differential RNA-seq analysis with eXpress

October 31, 2013
By
Real-time streaming differential RNA-seq analysis with eXpress

RNA-seq has been performed routinely for at least 5+ years, yet there is no consensus on the best methodology for analyzing this data. For example, Eduardo Eyras's group recently posted a pre-print on methods to study splicing from RNA-seq, where this ...

Read more »

Simulation of an Oxford (Undergrad) Interview Question

October 31, 2013
By
Simulation of an Oxford (Undergrad) Interview Question

A friend of mine, who's an economics teacher in London, is responsible for preparing some of his students for interviews at Oxford and Cambridge. He told me that, at these schools, students have to go through a nerve-wracking...

Read more »

Finding R in a Hadoop World

October 31, 2013
By
Finding R in a Hadoop World

by Joseph Rickert The following is a brief report of all things R encountered in my not quite random, but nevertheless far from determined, walk through the O'Reilly Strata / Hadoop World Conference held this week in NYC. To start off, I had the pleasure of doing a 9:00 AM Monday morning joint tutorial with Antonio Piccolboni, the principal...

Read more »

High resolution graphics with R

October 29, 2013
By
High resolution graphics with R

For most purposes PDF or other vector graphic formats such as windows metafile and SVG work just fine. However, if I plot lots of points, say 100k, then those files can get quite large and bitmap formats like PNG can be the better option. I just have to be mindful of the resolution.As an example I create the following...

Read more »