I just pushed the most recent version of the PSID panel data builder introduced a little while ago. Got some user feedback and made some improvements. The package is hosted on github.News:I added a reproducible example using artificial data which you c...
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Finding patterns in time series using regular expressions
Regular expressions are a fantastic tool when you’re looking for patterns in time series. I wish I’d realised that sooner. Here’s a timely example: traditionally, when you have two successive quarters of negative GDP growth, you’re in recession. We have a quarterly GDP time series for Australia, and we want to know how many recessions 
Integration take two – Shiny application
My last post discussed a technique for integrating functions in R using a Monte Carlo or randomization approach. The mc.int function (available here) estimated the area underneath a curve by multiplying the proportion of random points below the curve by the total area covered by points within the interval: The estimated integration (bottom plot) is 
Living it up with computational errors
How to have a better chance of a good outcome. Making mistakes There’s been a lot of talk recently about data analysis problems with spreadsheets. If you’ve not stuck your head out of your cave lately, then you can catch some of the discussion by doing an internet search for: Reinhart Rogoff There are several
The post Living...
Tutorials on git/github and GNU make
If you’re not using version control, you should be. Learn git. If you’re not on github, you should be. That’s real open source. To help some colleagues get started with git and github, I wrote a minimal tutorial. There are lots of git and github resources available, but I thought I’d give just the bare 
Package intergraph goes 2.0
Yesterday I submitted a new version (marked 2.0-0) of package ‘intergraph’ to CRAN. There are some major changes and bug fixes. Here is a summary: Main functions for converting network data between object classes “igraph” and “network” are now called asIgraph and asNetwork. There is a generic function asDF that converts network object to a
Gambler’s Run With Shiny
I finally had an opportunity to play with Shiny, and I am very impressed. I have created a Github Project so head over there for the source code. There are a number of ways to distribute Shiny apps. If you are running R (and mostly likely you are if you are reading this), you can download and...
Changing The Presidential Election with R in the Browser
After I finished with the tutorial post d3 <- R with rCharts and slidify and then saw R creates d3/javascript charts in Ipython Style Notebook, a light clicked. I could finally answer the lingering question I have had ever since I saw the NYT ...
d3 <- R with rCharts and slidify
I believe that the NY Times interactive feature 512 Paths to the White House is one of the best visualizations of all time. It is even better when we have details on the process of creating this marvel. Although the graphic is not suited for other data sources (please tell me if this is not...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
