# 3364 search results for "Map"

## An exercise in non-linear modeling

September 7, 2014
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In my previous post I wrote about the importance of age and why it is a good idea to try avoiding modeling it as a linear variable. In this post I will go through multiple options for (1) modeling non-linear effects in a linear regression setting, (2) benchmark the methods on a real dataset, and (3) look at how...

## 1.2 Millions Deaths by Ebola projected within Six Months?

September 5, 2014
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The World Health Organization, Samaratins Purse, Doctors Without Borders, and other international medical emergency relief programs are desperately calling for additional resources in the international fight against Ebola that has already killed thousa...

## jsonlite gets a triple mushroom boost!

September 5, 2014
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The jsonlite package is a JSON parser/generator optimized for the web. It implements a bidirectional mapping between JSON data and the most important R data types, which allows for converting objects to JSON and back without manual data restructuring. This is ideal for interacting with web APIs, or to build pipelines...

## EM Algorithm for Bayesian Lasso R Cpp Code

September 5, 2014
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Bayesian Lasso \$\$begin{align*} p(Y_{o}|beta,phi)&=N(Y_{o}|1alpha+X_{o}beta,phi^{-1} I_{n{o}})\ pi(beta_{i}|phi,tau_{i}^{2})&=N(beta_{i}|0, phi^{-1}tau_{i}^{2})\ pi(tau_{i}^{2})&=Exp left( frac{lambda}{2} right)\ pi(phi)&propto phi^{-1}\ pi(alpha)&propto 1\ end{align*}\$\$ Marginalizing over (alpha) equates to centering the observations and losing a degree of freedom and working with the centered ( Y_{o} ). Mixing over (tau_{i}^{2}) leads to a Laplace or Double Exponential prior on (beta_{i}) with rate parameter (sqrt{philambda}) The post

## In case you missed it: August 2014 Roundup

September 5, 2014
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In case you missed them, here are some articles from August of particular interest to R users: R is the most popular software in the KDNuggets poll for the 4th year running. The frequency of R user group meetings continues to rise, and there are now 147 R user groups worldwide. A video interview with David Smith, Chief Community...

## R: Image Analysis using EBImage

September 5, 2014
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Currently, I am taking Statistics for Image Analysis on my masteral, and have been exploring this topic in R. One package that has the capability in this field is the EBImage from Bioconductor, which will be showcased in this post.InstallationFor those...

## Crowded Cities, Paris, Hong Kong and Montréal

September 5, 2014
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Over the past years, I’ve been living in different cities, all of them being completely different, compared with the others. I have been living in Paris, which is a big city in Europe, with a large neighborhood, too (la banlieue). Then, I’ve been living in Hong Kong, which is a larger city, in Asia. It was crowded. I mean,...

## Shiny: R made interactive @ useR! 2014

September 4, 2014
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At useR! 2014, one of the most anticipated presentations was Joe Cheng’s Shiny: R made...

## Long Memory and the Nile: Herodotus, Hurst and H

September 4, 2014
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by Joseph Rickert The ancient Egyptians were a people with long memories. The lists of their pharaohs went back thousands of years, and we still have the names and tax assessments for certain persons and institutions from the time of Ramesses II. When Herodotus began writing about Egypt and the Nile (~ 450 BC), the Egyptians who knew that...

## “sinkr” – a collection of functions featured on “me nugget”

September 2, 2014
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The R package sinkr (version 1.0) has now been released:  https://github.com/menugget/sinkrI have finally gotten around to learning how to create an R package and decided to start by bundling functions that I have featured on the blog. Thanks to the R Studio team for making this so easy (in combination with...