2689 search results for "MAP"

NYC R Programming Classes – starting this coming Sunday

November 5, 2013
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NYC R Programming Classes – starting this coming Sunday

Guest post by Vivian Zhang, original post. You can sign up for our Sunday Intensive beginner level R classes at NYC Data Science Academy meetup page or email [email protected] for more info. Brief: The course (which will meet five Sundays) will start from the basics, introducing the building blocks used for programming in R and building intuition for writing clean and robust code....

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Generating d3js Motion Charts from rCharts

November 4, 2013
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Generating d3js Motion Charts from rCharts

Remember Gapminder, the animated motion chart popularised by Hans Rosling in his TED Talks and Joy of Stats TV programme? Well it’s back on TV this week in Don’t Panic – The Truth About Population, a compelling piece of OU/BBC co-produced stats theatre featuring Hans Rosling, and a Pepper’s Ghost illusion brought into the digital

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Spatial Clustering With Equal Sizes

November 4, 2013
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Spatial Clustering With Equal Sizes

This is a problem I have encountered many times where the goal is to take a sample of spatial locations and apply constraints to the algorithm.  In addition to providing a pre-determined number of K clusters a fixed size of elements needs to be held constant within each cluster. An application of this algorithm is

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Species occurrence data to CartoDB

November 4, 2013
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We have previously written about creating interactive maps on the web from R, with the interactive maps on Github. See here, here, here, and here. A different approach is to use CartoDB, a freemium service with sql interface to your data tables that provides a map to visualize data in those tables. They released...

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Dream Team – combining Tableau and R

November 3, 2013
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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...

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A Rather Nosy Topic Model Analysis of the Enron Email Corpus

November 3, 2013
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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 →

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Simulating Abstract Art with R

November 3, 2013
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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...

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

November 2, 2013
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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...

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Consumer’s Choosing an Optimal Bundle – Utility Maximization

November 2, 2013
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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...

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Efficiency Balanced Information Criterion for Item Selection

November 1, 2013
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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...

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