I do reports for clients with LyX and Sweave. It took me an extremely long time to get them working, but now that they’re working I can do more in an hour and thus charge more per hour. (Which is, like, the point.) If you’re not familiar, here’s ...
Monthly Archives: November 2011
Error Handling in Lyx & Sweave: using Quantmod (and R, of course)
I do reports for clients with LyX and Sweave. It took me an extremely long time to get them working, but now that they’re working I can do more in an hour and thus charge more per hour. If you’re not familiar, here’s a rundown: LaTeX is the stand...
Using Text Mining to Find Out What @RDataMining Tweets are About
This post shows an example on text mining of Twitter data with R packages twitteR, tm and wordcloud. Package twitteR provides access to Twitter data, tm provides functions for text mining, and wordcloud visualizes the result with a word cloud. … Continue reading →
readGrads – An R package to read and manipulate grads data
I created an R package to read grads data. As far as I know, there is no dedicated package to read grads data. The package is still quite new, any remarks on the documentation or code are more than welcome.… See more ›
Setting up AWS Cluster to use snow in R
Setting up AWS Cluster I wanted to setup an AWS cluster to take a shot at a Kaggle contest – DunnHumby Challenge http://www.kaggle.com/c/dunnhumbychallenge For this, I found StarCluster to be of great help. It allows you to set-up AWS nodes in a few lines of code and does much more (choosing AMIs and cluster configurations) 
Web Scraping Google Scholar (Partial Success)
I wanted to scrape the information returned by a Google Scholar web search into an R data frame as a quick XPath exercise. The following will successfully extract the ‘title’, ‘url’ , ‘publication’ and ‘description’. If any of these fields are not available, as in the case of a citation, the corresponding cell in the data 
Example 9.13: Negative binomial regression with proc mcmc
In practice, data that derive from counts rarely seem to be fit well by a Poisson model; one more flexible alternative is a negative binomial model. In this SAS-only entry, we discuss how proc mcmc can be used for estimation. An overview of support f...
Blankety Blank
The erstwhile big 4 all blanked their opponents last Saturday and a poster on the Guardian wondered when was the previous occasion of such an occurrence. It’s a pretty simple procedure in SQL using a subquery, but in the spirit of learning R, I thought I would tackle the problem in that language, with the
project euler – problem 47
The first two consecutive numbers to have two distinct prime factors are: 14 = 2 × 7 Read More: 278 Words Totally
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
