# 723 search results for "Register"

## Stop using bivariate correlations for variable selection

March 19, 2014
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Stop using bivariate correlations for variable selection Something I've never understood is the widespread calculation and reporting of univariate and bivariate statistics in applied work, especially when it comes to model selection. Bivariate statistics are, at best, useless for multi-variate model selection and, at worst, harmful. Since nearly all...

## Use Data Science to help CARE International in Atlanta, March 28

March 17, 2014
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CARE International is a humanitarian organization that is leading the charge to fight poverty around the world, with a focus on empowering women and girls. On March 28 in Atlanta, CARE is teaming up with Booz Allen Hamilton, Emory University's Rollins School of Public Health and Revolution Analytics to bring data scientists together to use R to explore some...

## How to use Bioconductor to find empirical evidence in support of π being a normal number

March 14, 2014
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Happy π day everybody! I wanted to write some simple code (included below) to the test parallelization capabilities of my  new cluster. So, in honor of  π day, I decided to check for evidence that π is a normal number. A … Continue reading →

## Bayesian Search Models

March 13, 2014
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Bayesian Search Theory The US had a pretty big problem on their hands in 1966. Two planes had hit each other during a in-flight refueling and crashed. Normally, this would be an unfortunate thing and terrible for the families of those involved in the crash but otherwise fairly limited...

## Confounding & collinearity

March 11, 2014
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(This article was first published on MATHEMATICS IN MEDICINE, and kindly contributed to R-bloggers) Confounding and collinearity Introduction In this blog article, I will discuss about the bias introduced in estimation of coefficient of a given explanatory variable due to the presence of confounding factors. After that, I will try to demonstrate about the effect of variable collinearity on...

## Lebanon shouldering Syria

March 10, 2014
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The crisis that is Syria has had an incredible regional affect geopolitically, economically, and has required a significant response in humanitarian aid.  As the mass evacuation has occurred, surrounding countries are found hosting thousands of pe...

March 9, 2014
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In the Intraday Backtest post I showed an example of loading and working with Forex Intraday data from the FXHISTORICALDATA.COM. Recently, I came across another interesting source of Intraday data at the Bonnot Gang site. Please note that you will have to register to get access to the Intraday data; the registration is free. Today,

## Hyperthreading FTW? Testing parallelization performance in R.

March 7, 2014
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Alright, let's test some parallelization functionalities in R.The machine:MacBook Air (mid-2013) with 8 GB of RAM and the i7 CPU (Intel i7 Haswell 4650U). This CPU is hyper-threaded, meaning (at least that's my understanding of it) that it has two...

## R-users.com: invite fellow R-users to Jobs, conferences, and R-projects

March 6, 2014
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Dear R users, I am happy to officially announce a new website called R-users.com. The idea of the site is that community members will invite other R users to join them in their R projects, conferences, and work places. This site is a “job board” for R users, hosting various “call to action” to R-users,

## Assign n Email Addresses to x Cells, Intrinsically

March 5, 2014
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Assign n Email Addresses to x Cells, Intrinsically Assign n Email Addresses to x Cells, IntrinsicallySample Use Case:Marketing requests that an email address list be divided randomly into a given number of cells so that each cell would receive a different version of...