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RStudio Connect v1.5.6 – Now Supporting Kerberos!

September 5, 2017
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RStudio Connect v1.5.6 – Now Supporting Kerberos!

We’re pleased to announce support for Kerberos in RStudio Connect: version 1.5.6. Organizations that use Kerberos can now run Shiny applications and Shiny R Markdown documents in tailored processes that have access only to the appropriate resources inside the organization. The notable changes this release include: Full support for Kerberos across Shiny applications and Shiny R Markdown documents by running R...

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Data Science for Fraud Detection

September 5, 2017
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Data Science for Fraud Detection

I have written the following post about Data Science for Fraud Detection at my company codecentric’s blog: Fraud can be defined as “the crime of getting money by deceiving people” (Cambridge Dictionary); it is as old as humanity: whenever two...

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Blocked Gibbs Sampling in R for Bayesian Multiple Linear Regression

September 5, 2017
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Blocked Gibbs Sampling in R for Bayesian Multiple Linear Regression

In a previous post, I derived and coded a Gibbs sampler in R for estimating a simple linear regression. In this post, I will do the same for multivariate linear regression. I will derive the conditional posterior distributions necessary for the blocked Gibbs sampler. I will then code the sampler and test it using simulated … Continue reading Blocked...

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Preview of EARL London 2017

September 5, 2017
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The next event in the Effective Applications of the R Language (EARL) conference series takes place next week, with EARL London 2017. The EARL conference series got its start in London, and the London event remains the biggest and brightest of the venues. This year's program is no exception, with an impressive raft of tutorials and keynote speakers, and...

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Upcoming talk at the Association of Public Data Users (APDU) Conference

September 5, 2017
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Upcoming talk at the Association of Public Data Users (APDU) Conference

On Thursday, September 14th I will be giving a lightning talk at the Association of Public Data Users (APDU) Conference in Alexandria, Virginia. The talk... The post Upcoming talk at the Association of Public Data Users (APDU) Conference appeared first on AriLamstein.com.

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Leverage Up When You’re Down?

September 5, 2017
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Leverage Up When You’re Down?

This post will investigate the idea of reducing leverage when drawdowns are small, and increasing leverage as losses accumulate. It’s … Continue reading →

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Mining Your Routine Data for Reference Intervals: Hoffman, Bhattacharya and Maximum Likelihood

September 5, 2017
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Mining Your Routine Data for Reference Intervals: Hoffman, Bhattacharya and Maximum Likelihood

Background Let me preface this by saying I am not making a recommendation to use the Hoffman method. Neither am I advocating for reference interval mining from routine data. There are many challenges associated with this kind of effort. That's for another post I think. However, I am going to how one does the calculations … Continue reading Mining...

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cdparcoord: Parallel Coordinates Plots for Categorical Data

September 4, 2017
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cdparcoord: Parallel Coordinates Plots for Categorical Data

My students, Vincent Yang and Harrison Nguyen, and I have developed a new data visualization package, cdparcoord, available now on CRAN. It can be viewed as an extension of the freqparcoord package written by a former grad student, Yingkang Xie and myself, which I have written about before in this blog. The idea behind both … Continue reading cdparcoord:...

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Nested Resampling with rsample

September 4, 2017
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Nested Resampling with rsample

A typical scheme for splitting the data when developing a predictive model is to create an initial split of the data into a training and test set. If resampling is used, it is executed on the training set where a series of binary splits is created. In rsample, we use the term analysis set for the data that...

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Readability Redux

September 4, 2017
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I recently posted about using a Python module to convert HTML to usable text. Since then, a new package has hit CRAN dubbed htm2txt that is 100% R and uses regular expressions to strip tags from text. I gave it a spin so folks could compare some basic output, but you should definitely give htm2txt... Continue reading →

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