Articles by Joseph Rickert

R, Extreme Value Statistics and Missing Data

July 16, 2015 | Joseph Rickert

by Joseph Rickert June was a hot month for extreme statistics and R. Not only did we close out the month with useR! 2015, but two small conferences in the middle of the month brought experts together from all over the world to discuss two very difficult areas of statistics that ... [Read more...]

5 Steps to Create an R Package Email Course

July 14, 2015 | Joseph Rickert

by Ari Lamstein, Software Engineer and Data Analyst Creating an email course for my R packages has significantly increased the number of people who use the packages. It has also reduced the learning curve for the packages and brought me into greater contact with my users. In this post I ... [Read more...]

Get your R education going with GitHub

July 2, 2015 | Joseph Rickert

by Joseph Rickert Last week, I was fortunate enough to attend the R Summit & Workshop, an invitation only event, held at the Copenhagen Business School. The abstracts for the public talks presented are online and well worth a look. Collectively they provide a snapshot of the state of development of ... [Read more...]

Working with the RStudio CRAN logs

June 25, 2015 | Joseph Rickert

by Joseph Rickert The installr package has some really nice functions for working with the daily package download logs for the RStudio CRAN mirror which RStudio graciously makes available at http://cran-logs.rstudio.com/. The following code uses the download_RStudio_CRAN_data() function to download a month's worth of .... [Read more...]

DeployR Data I/O

June 22, 2015 | Joseph Rickert

by Sean Wells, Senior Software Engineer, Microsoft and David Russell DeployR exists to solve a number of fundamental R analytics integration problems faced by application developers. For example, have you ever wondered how you might execute an R script from within a Web-based dashboard, an enterprise middleware solution, or a ... [Read more...]

Fishing for packages in CRAN

June 18, 2015 | Joseph Rickert

by Joseph Rickert It is incredibly challenging to keep up to date with R packages. As of today (6/16/15), there are 6,789 listed on CRAN. Of course, the CRAN Task Views are probably the best resource for finding what's out there. A tremendous amount of work goes into maintaining and curating these ... [Read more...]

Pairwise-complete correlation considered dangerous

June 16, 2015 | Joseph Rickert

by B. W. Lewis This note warns about potentially misleading results when using the use=pairwise.complete.obs and related options in R’s cor and cov functions. Pitfalls are illustrated using a very simple pathological example followed by a brief list of alternative ways to deal with missing data ... [Read more...]

R User Groups are Everywhere

June 11, 2015 | Joseph Rickert

by Joseph Rickert In a little over three weeks useR! 2015 will convene in Aalborg, Denmark and I am looking forward to being there and learning and talking about R user groups. The following map shows the big picture for R User Groups around the world. However, it is very difficult ...
[Read more...]

Some Impressions from R Finance 2015

June 4, 2015 | Joseph Rickert

by Joseph Rickert The R/Finance 2015 Conference wrapped up last Saturday at UIC. It has been seven years already, but R/Finance still has the magic! - mostly very high quality presentations and the opportunity to interact and talk shop with some of the most accomplished R developers, financial modelers ... [Read more...]

RevoScaleR’s Naive Bayes Classifier rxNaiveBayes()

May 28, 2015 | Joseph Rickert

by Joseph Rickert, Because of its simplicity and good performance over a wide spectrum of classification problems the Naïve Bayes classifier ought to be on everyone's short list of machine learning algorithms. Now, with version 7.4 we have a high performance Naïve Bayes classifier in Revolution R Enterprise too. ... [Read more...]

Fast parallel computing with Intel Phi coprocessors

May 19, 2015 | Joseph Rickert

by Andrew Ekstrom Recovering physicist, applied mathematician and graduate student in applied Stats and systems engineering We know that R is a great system for performing statistical analysis. The price is quite nice too ;-) . As a graduate student, I need a cheap replacement for Matlab and/or Maple. Well, ... [Read more...]

A first look at htmlwidgets

May 14, 2015 | Joseph Rickert

by Joseph Rickert A strong case can be made that base R graphics supplemented with either the lattice library or ggplot2 for plotting by subgroups provides everything a statistician might need for both exploratory data analysis and for developing clear, crisp for communicating results. However, it is abundantly clear that ... [Read more...]

Using Azure as an R data source, Part 1

May 12, 2015 | Joseph Rickert

by Gregory Vandenbrouck Software Engineer at Microsoft This post is the first in a series that covers pulling data from various Windows Azure hosted storage solutions (such as MySQL, or Microsoft SQL Server) to an R client on Windows or Linux. We’ll start with a relatively simple case of ... [Read more...]

Digging up embedded plots

May 7, 2015 | Joseph Rickert

by Joseph Rickert The following multi-panel graph, which graces the cover of the most recent issue of the Journal of Computational and Graphical Statistics ,JCGS, (Vol 24, Num 1, March 2015) is from the paper by Grolemund and Wickham entitled Visualizing Complex Data With Embedded Plots. The four plots are noteworthy for a ... [Read more...]

Data Science in HR

May 5, 2015 | Joseph Rickert

by Joseph Rickert Last year in a post on interesting R topics presented at the JSM I described how data scientists in Google's human resources department were using R and predictive analytics to better understand the characteristics of its workforce. Google may very well have done the pioneering work, but ... [Read more...]
1 5 6 7 8 9 17

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)