Monthly Archives: June 2015

rapier — Convert R Code to a Web API

June 24, 2015
By

I’m excited to announce a new R package: rapier, a package that enables you to convert your existing R code into web APIs by merely adding a couple of special comments. Take a look: # myfile.R #' @get /mean normalMean

Read more »

Modeling Interest Rates Meucci Style

June 24, 2015
By
Modeling Interest Rates Meucci Style

I have signed up for Attilio Meucci’s ARPM Bootcamp next month (July 13-18) in NYC http://www.symmys.com/arpm-bootcamp, and need to do quite a bit of prep as it’s going to be a deep-dive…The Advanced Risk and Portfolio Management Bootcamp provides in-depth understanding of buy-side modeling from the foundations to the most advanced statistical and optimization techniques, in 6 intensive days...

Read more »

Presentations in (R)markdown

June 24, 2015
By
Presentations in (R)markdown

There are many ways to turn a markdown or Rmarkdown document into a presentation. Way too many, and none of them is perfect. I made my first presentation with knitr / Rmarkdown for the tmod package. After trying various options in knitr, I decided on an approach in which the Rmarkdown document is oblivious of

Read more »

Setting Rstudio server using Amazon Web Services (AWS) – a step by step (screenshots) tutorial

June 24, 2015
By

(this is a guest post by Liad Shekel) Amazon Web Services (AWS) include many different computational tools, ranging from storage systems and virtual servers to databases and analytical tools. For us R-programmers, being familiar and experienced with these tools can be extremely beneficial in terms of efficiency, style, money-saving and more. In this post we present … Continue reading Setting...

Read more »

Short is the new Long with longurl for R (plus working with weblogs & URLs in R)

June 23, 2015
By

Necessity is the mother of invention and I had the opportunity today to take an R package from development to CRAN in less than the span of 24 hours. Despite being on vacation, I answered an R question on StackOverflow pertaining to the use of decode_short_url from the twitteR package. That function has no option for validity checking (i.e. whether the...

Read more »

Stop and Frisk: Spatial Analysis of Racial Differences

June 23, 2015
By
Stop and Frisk: Spatial Analysis of Racial Differences

In my last post, I compiled and cleaned publicly available data on over 4.5 million stops over the past 11 years. I also presented preliminary summary statistics showing that blacks had been consistently stopped 3-6 times more than whites over the last decade in NYC. Since the last post, I managed to clean and reformat the … Continue reading Stop...

Read more »

Stop and Frisk: Spatial Analysis of Racial Discrepancies

June 23, 2015
By
Stop and Frisk: Spatial Analysis of Racial Discrepancies

In my last post, I compiled and cleaned publicly available data on over 4.5 million stops over the past 11 years. I also presented preliminary summary statistics showing that blacks had been consistently stopped 3-6 times more than whites over the last decade in NYC. Since the last post, I managed to clean and reformat the … Continue reading Stop...

Read more »

Network analysis with igraph

June 23, 2015
By
Network analysis with igraph

Suddenly, I had to learn network analysis. Two weeks ago I started with a book by Christakis and Fowler, then a book by Kolaczyk and Csárdi, now here I am in a “how to” analyse network data using R moment. This is much like learning-by-doing knowledge, so may be useful for newcomers, although at this … Read More →

Read more »

Pull the (character) strings with stringi 0.5-2

June 23, 2015
By

A reliable string processing toolkit is a must-have for any data scientist. A new release of the stringi package is available on CRAN (please wait a few days for Windows and OS X binary builds). As for now, about 850…Read more ›

Read more »

URL Originality Analysis

June 23, 2015
By
URL Originality Analysis

By Chris Campbell, Senior Consultant. When I first heard about Twitter, it was described to me as love, life and the story of the world, summarized in 140 characters or less. Each snippet of information is like a beautiful haiku, … Continue reading →

Read more »

Search R-bloggers

Sponsors

Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)