June 2016

Your data vis “Spidey-sense” & the need for a robust “utility belt”

June 16, 2016 | hrbrmstr

@theboysmithy did a great piece on coming up with an alternate view for a timeline for an FT piece. Here’s an excerpt (read the whole piece, though, it’s worth it): Here is an example from a story recently featured in the FT: emerging- market populations are expected to ... [Read more...]

Mapping US Counties in R with FIPS

June 16, 2016 | Kris Eberwein

Anyone who’s spent any time around data knows primary keys are your friend. Enter the FIPS code. FIPS is the Federal Information Processing Standard and appears in most data sets published by the US government. Name Matching The map below is an example as the “wrong way” to do ...

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The R Packages of UseR! 2016

June 16, 2016 | Joseph Rickert

by Joseph Rickert It is always a delight to discover a new and useful R package, and it is especially nice when the discovery comes with at context and testimonial to its effectiveness. It is also satisfying to be able to check in once in awhile and get an idea ... [Read more...]

A Return.Portfolio Wrapper to Automate Harry Long Seeking Alpha Backtests

June 16, 2016 | Ilya Kipnis

This post will cover a function to simplify creating Harry Long type rebalancing strategies from SeekingAlpha for interested readers. As … Continue reading →

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Visualizing obesity across United States by using data from Wikipedia

June 16, 2016 | Klodian Dhana

In this post I will show how to collect from a webpage and to analyze or visualize in R. For this task I will use the rvest package and will get the data from Wikipedia. I got the idea to write this post from Fisseha Berhane. I will gain access ... [Read more...]

Struggling with Non Standard Evaluation

June 16, 2016 | Mitchell Gritts

All the functions in dplyr (and many of the packages in the “hadleyverse”) use Non Standard Evaluation (NSE). NSE is extremely handy and generally reduces the amount of typing required. However functions that use NSE aren’t always intuitive to us... [Read more...]

Radar charts in R using Plotly

June 16, 2016 | Riddhiman

This post is inspired by this question on Stack Overflow.. We’ll show how to create excel style Radar Charts in R using the plotly package. [crayon-5762c6131f2a7818037493/] [Read more...]

Hyperparameter Optimization in H2O: Grid Search, Random Search and the Future

June 15, 2016 | Raymond Peck

“Good, better, best. Never let it rest. ‘Til your good is better and your better is best.” – St. Jerome tl;dr H2O now has random hyperparameter search with time- and metric-based early stopping. Bergstra and Bengio[1] write on p. 281: Compared with neural networks configured by a pure grid search, ... [Read more...]

Leverage and Influence in a Nutshell

June 15, 2016 | Once Upon a Data

Once upon a data, there were outliers and influential observations in regression models. Using these models, we learnt that a common practice was to perform diagnostics checks to dig deeper and see how different points affect the fitted model or its coeffecients. So here we go! [Read more...]

Euro 2016 Squads

June 15, 2016 | Guy Abel

This weekend I was having fun in France watching some Euro 2016 matches, visiting friends and avoiding Russian hooligans. Before my flight over I scraped some tables on the tournaments Wikipedia page with my newly acquired rvest skills, with the idea to build up a bilateral database of Euro 2016 squads and ...

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Taking a closer look at Quantum gates and their operations

June 15, 2016 | Tinniam V Ganesh

This post is a continuation of my earlier post ‘Exploring Quantum gate operations with QCSimulator’. Here I take a closer look at more quantum gates and their operations, besides implementing these new gates in my Quantum Computing simulator, the QCSimulator in R. Disclaimer: This article represents the author’s viewpoint ...

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Beamer template to write in english and chinese

June 15, 2016 | "Mauricio Vargas S. 帕夏"

I needed to create some slides in pdf as my audience asked for it instead of html slides. Some time ago I made my own Beamer's template and now I improved it a bit to be used in TeXShop and RStudio. I use Lucida Fonts for $\rm \LaTeX$ and that ... [Read more...]

Gender ratios of programmers, by language

June 15, 2016 | David Smith

While there are many admirable efforts to increase participation by women in STEM fields, in many programming teams men still outnumber women, often by a significant margin. Specifically by how much is a fraught question, and accurate statistics are hard to come by. Another interesting question is whether the gender ... [Read more...]

Monthly Regional Tourism Estimates

June 15, 2016 | Peter's stats stuff - R

A big 18 month project at work culminated today in the release of new Monthly Regional Tourism Estimates for New Zealand. Great work by the team in an area where we’ve pioneered the way, using administrative data from electronic transactions to supplement traditional sources in producing official statistics. Here’s ... [Read more...]

Calculate your nutrients with my new package: NutrientData

June 15, 2016 | Mikkel

I have created a new package: NutrientData This package contains data sets with the composition of Foods: Raw, Processed, Prepared. The source of the data is the USDA National Nutrient Database for Standard Reference, Release 28 (2015), a long with two functions to search and calculate nutrients. You download it from github: ... [Read more...]

Iraq-Wikileaks Analysis with R

June 14, 2016 | Cory Lesmeister

In a place of extreme violence and devoid of order, the practical subsumes the principle. I drifted down the path of bribery and corruption endemic to the streets of Baghdad”.Jason Whiteley, Father of Money: Buying Peace in BaghdadAs I mentioned in a previous post, I wanted to explore the ...

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A shout Out to R bloggers

June 14, 2016 | Once Upon a Data

Since I started to work with R, I became a frequent visitor to R-bloggers web site where I find a variety of helpful tips and tutorials. Now, as I started my own blog, it is time to give a shout-out to them! [Read more...]

Using Random Residuals for Censored Data in EGRET

June 14, 2016 | The USGS OWI blog

EGRET is an R-package for the analysis of long-term changes in water quality and streamflow, and includes the water-quality method Weighted Regressions on Time, Discharge, and Season (WRTDS). It is available on CRAN. More information can be found at https://github.com/USGS-R/EGRET. Introduction When censored data are present ...

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jsonlite 0.9.22: distinguish between double and integer

June 14, 2016 | Jeroen Ooms

Today a new version of the jsonlite package was released to CRAN. This update includes a few internal enhancements and one new feature. Doubles vs integers The new always_decimal parameter forces formatting of doubles in decimal notation....

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Working with Rmd files using knitr and WordPress

June 14, 2016 | Kevin

Author Kevin June 14, 2016 This is a page I created in R Markdown and used knitr to produce the output to html. I then copied the html file into a new post and did some editing. I am using the data from the “airquality” data set already in R and I ... [Read more...]

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June 2016

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