February 2014

rMaps Mexico map

February 26, 2014 | Fellgernon Bit - rstats

It's exciting when great people help each other get things done This is a simple networking story, which not be surprising to some but I was happily surprised by it. This is how the story goes: Two weeks ago rMaps (Vaidyanathan, 2014) was released. After making a blog post about it ...
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Nonlinear Time Series just appeared

February 25, 2014 | xi'an

My friends Randal Douc and Éric Moulines just published this new time series book with David Stoffer. (David also wrote Time Series Analysis and its Applications with Robert Shumway a year ago.) The books reflects well on the research of Randal and Éric over the past decade, namely convergence results ... [Read more...]

A Year of Using RStudio

February 25, 2014 | ivannp

It has been more than a year since I decided to give RStudio yet another try (yes, there were previous attempts) and … I can’t live without it today! Nowadays I use it almost 100% of the time when working on R code, but the reason is not just a preference ... [Read more...]

Web Scraping part2: Digging deeper

February 25, 2014 | Rolf Fredheim

Slides from the second web scraping through R session: Web scraping for the humanities and social sciencesIn which we make sure we are comfortable with functions, before looking at XPath queries to download data from newspaper articles. Examples includ... [Read more...]

Next Kölner R User Meeting: 26 February 2014

February 25, 2014 | Markus Gesmann

The next Cologne R user group meeting is scheduled for tomorrow, 26 February 2014. We are delighted to welcome: Diego de Castillo: R and databases Kim Kuen Tang: Hands on using R and kdb+ together Frank Celler: ArangoDB (Lightning Talk) Further details and the agenda are available on our KölnRUG Meetup ... [Read more...]

2013-11 Improving the ‘gridGraphviz’ package in R

February 24, 2014 | akoh003

The gridGraphviz package renders node-and-edge graphs in R using the grid graphics package. Graphs are laid out using the Rgraphviz package to interface with the graph layout algorithms in graphviz. This article details the improvements made between gridGraphviz versions 0.2 … Continue reading → [Read more...]

The forecast mean after back-transformation

February 24, 2014 | Rob J Hyndman

Many functions in the forecast package for R will allow a Box-Cox transformation. The models are fitted to the transformed data and the forecasts and prediction intervals are back-transformed. This preserves the coverage of the prediction intervals, and the back-transformed point forecast can be considered the median of the forecast ... [Read more...]

Bayesian First Aid: Two Sample t-test

February 24, 2014 | Rasmus Bååth

As spring follows winter once more here down in southern Sweden, the two sample t-test follows the one sample t-test. This is a continuation of the Bayesian First Aid alternative to the one sample t-test where I’ll introduce the two sample alternative. It will be a quite short post ... [Read more...]

Brief introduction on Sweave and Knitr for reproducible research

February 24, 2014 | beckmw

A few weeks ago I gave a presentation on using Sweave and Knitr under the guise of promoting reproducible research. I humbly offer this presentation to the blog with full knowledge that there are already loads of tutorials available online. This presentation is specific and slightly biased towards Windows OS, ... [Read more...]

Adding color to R plot: a function

February 24, 2014 | grumble10

A friend of mine told me that she was spending her day colouring R plot because she never understood how to put color in them. This triggered a nerdy reaction in me that I had to put in a basic function. This was actually a funny exercise for two reasons: ... [Read more...]

How to Make a Bad Password with R

February 24, 2014 | wrathematics

I have a lot of projects that will take ages to finish (some are in such poor shape that I tuck them away in private repositories, so no one can see my shame).  So sometimes it's nice to just take a weekend and crank out something start to finish, even ... [Read more...]
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