January 2017

tidyquant 0.3.0: ggplot2 Enhancements, Real-Time Data, and More

January 21, 2017 | business-science.io - Articles

tidyquant, version 0.3.0, is a pretty sizable release that includes a little bit for everyone, including new financial charting and moving average geoms for use with ggplot2, a new tq_get get option called "key.stats" for retrieving real-time stock inf... [Read more...]

R vs Python – a One-on-One Comparison

January 21, 2017 | Shirin's playgRound

I’m an avid R user and rarely use anything else for data analysis and visualisations. But while R is my go-to, in some cases, Python might actually be a better alternative. That’s why I wanted to see how R and Python fare in a one-on-one compariso...

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Updated Example Repo for RMarkdown and Metropolis/Mtheme

January 21, 2017 | Thinking inside the box

During useR! 2016, Nick Tierney had asked on Twitter about rmarkdown and metropolis and whether folks had used RMarkdown-driven LaTeX Beamer presentations. My firm hell yeah answer, based on having used mtheme outright or in local mods for quite some... [Read more...]

RcmdrPlugin.KMggplot2_0.2-4 is on CRAN

January 21, 2017 | triadsou

RcmdrPlugin.KMggplot2 v0.2-4 (an Rcmdr plug-in; a GUI for 'ggplot2') was released on Dec. 20, 2016. RcmdrPlugin.KMggplot2 (CRAN) NEWS Changes in version 0.2-4 (2016-12-20) ggplot2 2.2.0 was supported. Added ggplot2's colour/fill scales (scale_hue, scale_grey). New plot: Beeswarm plot in Box plot (Th…

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Metro Systems Over Time: Part 1

January 21, 2017 | Page Piccinini

Note, at the time of this writing using the packages ggplot2 and ggmap from CRAN will result in an error. To avoid the error be sure to install both packages from GitHub with the package devtools and restart R if the problem persists. devtools::install_github("dkahle/ggmap") devtools::install_... [Read more...]

Does seasonally adjusting first help forecasting?

January 21, 2017 | Peter's stats stuff - R

The experiment A colleague at work was working with a time series where one got quite different results depending on whether one seasonally adjusted it first, or treated the seasonality as part of a SARIMA (seasonal auto-regressive integrated moving av... [Read more...]

Speed Up Your Code Part 2: Parallel Processing Financial Data with multidplyr + tidyquant

January 20, 2017 | business-science.io - Articles

Since my initial post on parallel processing with multidplyr, there have been some recent changes in the tidy eco-system: namely the package tidyquant, which brings financial analysis to the tidyverse. The tidyquant package drastically increase the amo... [Read more...]

Generate text using Markov Chains (sort of)

January 20, 2017 | Roel M. Hogervorst

Inspired by the hilarious podcast The Greatest Generation, I have worked again with all the lines from all the episode scripts of TNG. Today I will make a clunky bot (although it does nothing and is absolutely not useful) that talks like Captain ... [Read more...]

Implementation of a basic reproducible data analysis workflow

January 20, 2017 | Joris Muller's blog - Posts about R

In a previous post, I described the principles of my basic reproducible data analysis workflow. Today, let’s be more practical and see how to implement it. Be noted that it is a basic workflow. The goal is to find a good balance between a minimal re... [Read more...]

Visualizing "The Best"

January 20, 2017 | max humber

How do you measure “The Best”? It’s not immediately clear. Because, “The Best” is incredibly vague and subjective. My “Best” is not the same as your “Best”. And our “Best”s can converge and diverge depending on what we are measur... [Read more...]

Free guide to text mining with R

January 20, 2017 | David Smith

Jilia Silge and David Robinson are both dab hands at using R to analyze text, from tracking the happiness (or otherwise) of Jane Austen characters, to identifying whether Trump's tweets came from him or a staffer. If you too would like to be able to make statistical sense of masses ... [Read more...]

Introducing sparklyr to the Madrid R User Group

January 20, 2017 | Joseph Rickert

by Carlos Ortega In the last meeting of 2016, the 40th in Madrid’s R Users Group five-year history, we had the opportunity to listen (via Skype) to a very interesting talk by Javier Luraschi, the main author of the package sparklyr. In our previous meeting, a colleague of the Community (... [Read more...]

A Recipe for Automatically Going From Data to Text to Reveal.js Slides

January 20, 2017 | Tony Hirst

Over the last few years, I’ve experimented on and off with various recipes for creating text reports from tabular data sets, (spreadsheet plugins are also starting to appear with a similar aim in mind). There are several issues associated with this, including: identifying what data or insight you want ...

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Finding antipodes using the globe and ggmap packages

January 20, 2017 | Peter Prevos

The antipode of any place on Earth is the point on the Earth's surface that is diametrically opposite to it. How can you use ggmap to find antipodes? Continue reading → The post Finding antipodes using the globe and ggmap packages appeared first on Data Science with R.

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R for Beginners: Running Chi-Squared Tests

January 20, 2017 | Traversing Bits

Chi-squared test is useful to see differences between two distributions when they are not normal. Here’s an easy-to-do chi squared test on R. In this test, I’m trying to see if two hashtags are different in terms of collective coping… Continue Reading → The post R for Beginners: Running ... [Read more...]

Cointegrated ETF Pairs Part II

January 19, 2017 | cfsmith

Update 5/17: As discussed in the comments, the reason the results are so exaggerated is because it is missing portfolio rebalancing to account for the changing hedge ratio. It would be interesting to try an adaptive hedge ratio that requires only weekly or monthly rebalancing to see how legitimately profitable this ...

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Knoxville, TN: R for Text Analysis Workshop

January 19, 2017 | Bob Muenchen

The Knoxville R Users Group is presenting a workshop on text analysis using R by Bob Muenchen. The workshop is free and open to the public. You can join the group at https://www.meetup.com/Knoxville-R-Users-Group. A description of the workshop follows. R for … Continue reading →

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Easily explore a table with shinycsv

January 19, 2017 | Fellgernon Bit - rstats

Have you ever had to explore a table with data? I believe the answer is yes for most people that work at a computer or even just use it for communicating with their friends and family. Tables of data pop up everywhere, for example in personal finance. ... [Read more...]

Mean and Quantile Regression using Mosek

January 19, 2017 | Ignacio Sarmiento Barbieri

Many of the problems we encounter in Econometrics can be formulated as a linear or a quadratic problem. In this post, I want to approach two traditional problems: Quantile Regression and Ordinary Least Squares as convex problems and how to implement them in R using the package RMosek.