If you're like me, you love ipython notebook but often write R. RStudio's integrated RMarkdown is nice, but for some contexts like quick demos or basic training, a browser-based interface is unbeatable. What if we could get the best of both worlds - an ipython notebook for R? The answer is rNotebook, and if you
Last week, I shared that Dan Katz and I had finally published a draft of our paper, Measuring the Complexity of the Law: The U.S. Code. We'd previewed this research on Computational Legal Studies years ago. Since then, we've received great feedback and a number of questions. The most common question, even among legal professionals,
Throughput, throughput, throughput - for many databases, this is the performance measure of importance. When you are working with a fixed number of IOPS but see mixed workload types, system health can be assessed through the average read and write operation size. In an ASM environment, we can query this information by ASM disk
How long does your Oracle RMAN backup take to complete? How does this vary over time? Are there patterns by week, week of month, or day of week? The gist below can help you evaluate questions like these. If you're interested in using R with Oracle more generally, check out this previous post
Back in 2011, I covered the relative performance difference of the most popular libraries for text processing in R and Python. In case you can't guess the answer, Python and NLTK won by a significant margin over R and tm. Text processing with R seemed simple on paper, but performance and flexibility limitations have
In many circumstances, you might want to connect R directly to a database to store and retrieve data. If the source database is an Oracle database, you have a number of options: ROracle RODBC RJDBC Using ROracle should theoretically provide you with the best performing client, as this library is a wrapper around the
Much of my time lately has gone into analyzing and trading products in the volatility complex. As a result, I regularly watch the VIX term structure for continuations or deviations from trend. To make analysis simpler, I've written some R code that rips the term structure off the CBOE VIX term structure page and
Did you find this post useful? Does your organization need Oracle services? We can help. Much of this morning went into investigating strange ADDM reports on a two-node Oracle RAC database. For some reason, there were statistically improbable differences between impact percentages that have persisted over a month; in this case, instance 2 would
Here's one purely for fun - a wordcloud built from the Supreme Court's opinion on Arizona et al. v United States. Word clouds, though certainly not the most scientific of visualization techniques, are often engaging and "fun" ways to lead into discussion on NLP or topic modeling. Arizona et al. v United States wordcloud
Based on Launchpad traffic and mailing list responses, Gabor and Tamas will soon be releasing igraph 0.6. In celebration, I’ll be publishing a number of helpful lists and tables I’ve put together to organize information about igraph. In this post, we’ll cover the community detection algorithms (~i.e., clustering, partitioning, segmenting) available in 0.6
