February 2016

Calling RSiteCatalyst From Python

February 22, 2016 | Randy Zwitch

@randyzwitch Do you know if anyone has gotten RSiteCat running in a Jupyter Notebook that ran RPY2? Tired of using 2 different environments — Adam Gitzes (@FootballActuary) February 18, 2016 This will be a very short post, because the only “new” information I’m going to provide is the minimal example to answer the ... [Read more...]

Bind exercises

February 22, 2016 | r-exercises

Binding vectors, matrices and data frames using rbind and cbind is a common R task. However, when dimensions or classes differ between the objects passed to these functions, errors or unexpected results are common as well. Sounds familiar? Time to practice! Answers to the exercises are available here. Exercise 1 Try ... [Read more...]

Calling RSiteCatalyst From Python

February 22, 2016 | randyzwitch.com

@randyzwitch Do you know if anyone has gotten RSiteCat running in a Jupyter Notebook that ran RPY2? Tired of using 2 different environments — Adam Gitzes (@FootballActuary) February 18, 2016 This will be a very short post, bec... [Read more...]

From spss to R, part 2

February 21, 2016 | Roel M. Hogervorst

Introduction In this lesson we will open a .sav file in Rstudio and manipulate the data.frame. We will select parts of the file and create some simple overviews. First time with R? No problem, see lesson 1 (https://rmhogervorst.github.io/cleancode/blog/2016/02/20/from-spss-to-r-part1.html#introduction “From spss to R, ...
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more e’s [and R’s]

February 21, 2016 | xi'an

Alex Thiéry suggested debiasing the biased estimate of e by Rhee and Glynn truncated series method, so I tried the method to see how much of an improvement (if any!) this would bring. I first attempted to naïvely implement the raw formula of Rhee and Glynn with a (...
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Convert Car2go Austin into an EV Fleet

February 21, 2016 | Jun Ma - Data Blog

Code is published on my github.Previously, I did some analysis on car2go's location data to find the most popular roads in Austin. But we can do much more. One question I have is: if car2go wants to replace the entire Austin fleet with electric vehicles, where should ... [Read more...]

Large scale eigenvalue decomposition and SVD with rARPACK

February 21, 2016 | Yixuan's Blog - R

In January 2016, I was honored to receive an “Honorable Mention” of the John Chambers Award 2016. This article was written for R-bloggers, whose builder, Tal Galili, kindly invited me to write an introduction to the rARPACK package. A Short Story of rARPACK Eigenvalue decomposition is a commonly used technique in numerous ... [Read more...]

inegiR version 1.2

February 21, 2016 | En El Margen - R-English

Version 1.2 of inegiR is now on CRAN so I thought I’d write a few words/vignette about what’s new or different, if at all. By the way, i’m writing in english because more people seem to read r-bloggers than my blog (no surprise there), however the pdf ... [Read more...]

Big Business Backs Hillary: Small Bernie

February 19, 2016 | Francis Smart

Big business, lawyers, and the financial sector are the largest campaign backers of Hillary Clinton. Collectively they represent 35.5 million dollars donated to her campaign, 38% of total itemized funds donated to the Clinton campaign in 2015. Bernie Sanders on the other hand is largely backed by a diverse collection of individuals: engineers, ...
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Large scale eigenvalue decomposition and SVD with rARPACK

February 19, 2016 | R on Yixuan's Blog

In January 2016, I was honored to receive an “Honorable Mention” of the John Chambers Award 2016. This article was written for R-bloggers, whose builder, Tal Galili, kindly invited me to write an introduction to the rARPACK package. A Short Story of rARPACK Eigenvalue decomposition is a commonly used technique in numerous ... [Read more...]

From spss to R, part 1

February 19, 2016 | Roel M. Hogervorst

Introduction This whole blog is devoted to R and clean coding in R. But what if you want to start with R? There are millions of websites devoted to learning R. just look at the number of hits on a certain search machine. Most of these hits start with the ...
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Read from hdfs with R. Brief overview of SparkR.

February 19, 2016 | Data Science Notes - R

Disclaimer: originally I planned to write post about R functions/packages which allow to read data from hdfs (with benchmarks), but in the end it became more like an overview of SparkR capabilities. Nowadays working with “big data” almost always means working with hadoop ecosystem. A few years ago this ... [Read more...]

Toying with models: The Luria–Delbrück fluctuation test

February 19, 2016 | mrtnj

I hope that Genetics will continue running expository papers about their old classics, like this one by Philip Meneely about Luria & Delbrück (1943). Luria & Delbrück performed an experiment on bacteriophage resistance in Escherichia coli, growing bacterial cultures, exposing … Läs mer →
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