Social Science Goes R: Weighted Survey Data Survey Data: Computing Your Own Weights The second installment in my series on working with survey data in R explains how to compute your own post-stratification weights to use with survey data. For a more detailed overview on why you might need post-stratification ... [Read more...]

ggplot2 tries to make it super easy to add country or state borders to your map, and for the most part it works great as long as you include the entire map region in your plot (all the states or the entire world map for example). A long standing issue ... [Read more...]

There's so much being written about R these days, and justifiably so. If you use R for your econometrics, you should also keep in mind that its applicability is far wider than statistical analysis.  A big HT to the folks at Quandl for leading me to a nice overview of ... [Read more...]

ChIPpeakAnno WAS the only one R package for ChIP peak annotation. I used it for annotating peak in my recent study. I found it does not consider the strand information of genes. I reported the bug to the authors, but they are reluctant to change. Read More: 2903 Words Totally [Read more...]

The next stage in my earthquake analysis project is to partition the events into groups with epicentre over land or water. Since our existing catalog contains the latitude and longitude for the epicentres, it was a relatively simple matter to pipe these into gmtselect and label the events accordingly. The ... [Read more...]

I love massive open online courses such as provided on Coursera and edX. So I enrolled in the Data Analysis for Genomics course on edX. I am not alone there as seen from this posting on FreshBiostats.I was shocked when I took the Pre-Course R self-asse... [Read more...]

Originally posted on Rolling Your Rs:In this article I discuss a general approach for Geocoding a location from within R, processing XML reports, and using R packages to create interactive maps. There are various ways to accomplish this, though using Google’s GeoCoding service is a good place to ... [Read more...]

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Lately, I have been interested in methods related to age-length keys. One aspect of this interest has been in visualizing age-length keys. I had seen various visualizations in publications and wanted to be able to reproduce those relatively efficiently. To … Continue reading → [Read more...]

A little while back there was an article in blogTO about how a reddit user had used data from Toronto's Open Data initiative to produce a rather cool-looking map of all the locations of all the traffic signals here in the city.It's neat because as the author on blogTO ... [Read more...]

Also I'm not to much into Technical Indicators and Chart-Analysis during system development it is sometimes handy to visualize your buy and selllimits in a chart.The quantmod package provides a nice charting environment and you can select from a bunch ... [Read more...]

Introduction The memoise package can be very handy for caching the results of slow calculations. In interactive work, the slowest calculations can be reading data, so that is demonstrated here. The microbenchmark package shows timing results. Methods and results Setup First, load the package being tested, and also a benchmarking ... [Read more...]

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As the Le Monde mathematical puzzle of this week was a geometric one (the quadrangle ABCD is divided into two parts with the same area, &tc…) , with no clear R resolution, I chose to bypass it. In this April 3 issue, several items of interest: first, a report by Etienne Ghys ... [Read more...]

Visualize violent crime rates in different US States with choroplethr package Visualize violent crime rates in different US States with choroplethr package I knew choroplethr package by the blog post Animated Choropleths in R a few days ago. As a another visualization tool in R language, I wana try this ... [Read more...]

If you are a newcomer to R then you are probably quite busy learning the semantics of the language as you experiment with the apply family of commands or come up to speed on the grouping and conditioning capabilities offered by lattice graphics. And, along the way, you might have ... [Read more...]

I agree the market selloff has been weak thus far (especially as a frustrated bear).  However, I find it humorous as some widely followed commentators say things like “You’re only down x% ytd.  It’s not that bad”.  I wonder if this selloff g... [Read more...]

Here's something fun you can do with R and its interface to Twitter, the TwitteR package. An R script by CMU student Mark Patterson downloads your Twitter profile picture, counts the number of Twitter followers you have, and then creates a pointillist version of your profile picture with as many ... [Read more...]

I previously wrote about accessing step data in R using the fitbit API and at the time said I could think of little to do with the data that was not available via the fitbit website. Since then I’ve rejoined … Continue reading → [Read more...]

I've been a big fan of rbloggers for quite some time, but have only recently started contributing myself. After my first post yesterday, I immidiately started wondering how long most other bloggers go between posts. I decided to gather the list of past posts to rbloggers to investigate a bit. ... [Read more...]