Tag: R

Feed: R-bloggers. Author: R on Jacob Long. It has been a long time coming, but my R packagepanelr is now onCRAN. Since I started work on itwell over a year ago, it has become essential to my own workflow and I hopeit can be useful for others. panel_data object class One key contribution, that I hope can help other developers, is the creation ofa panel_data object class. It is a modified tibble, which is itself amodified data.frame. panel_data frames are grouped by entity, so manyoperations (e.g., mean(), cumsum()) performed by dplyr’s mutate()are groupwise operations. The panel_data frame also works very ... Read More

Feed: R-bloggers. Author: Giorgio Garziano. Category Tags This is the fourth part of our post series about the exploratory analysis of a publicly available dataset reporting earthquakes and similar events within a specific 30 days time span. In this post, we are going to show a cluster analysis of earthquakes located into the California state mainland. In the specific we will show a California map where earthquakes are highlighted by different color based on their magnitude we will determine the optimal number of clusters by means of the elbow method we will take advantage of the kmeans clustering;k-means clustering aims ... Read More

Feed: R-bloggers. Author: free range statistics - R. Like most people, I was surprised at yesterday’s result for the Australian federal election. But I was much less surprised than most people. The two-party-preferred vote for the ALP (currently 49.11%, with a lot of pre-polling still to count) came down at the bottom of my prediction interval but was still inside it; and they look to have a chance of making 68 or 69 seats, which was the lower range of my 80% prediction interval for number of seats. A 95% prediction interval would have comfortably included the result. While I ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: Robert R. Tucci. I am pleased to announce that my quantum simulator Qubiter (available at GitHub, BSD license) now has a native TensorFlow Backend-Simulator (see its class `SEO_simulator_tf`, the `tf` stands for TensorFlow). This complements Qubiter's original numpy simulator (contained in its class `SEO_simulator`). A small step for Mankind, a giant leap for me! Hip Hip Hurray! This means that Qubiter can now calculate the evolution of a state vector using CPU, GPU or TPU. Plus it can do back-propagation on a quantum circuit. Here is a jupyter notebook that I ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: Vincent Granville. This is another spectacular property of the exponential distribution, and also the first time an explicit formula is obtained for the variance of the range, besides the uniform distribution. It has important consequences, and the result is also useful in applications. Theorem The range R(n) associated with n independent random variables with an exponential distribution of parameter l satisfies Before proving the theorem, note that the first formula is well known, only the second one is new. The standard proof for the expectation is not considered simple: it is ... Read More

Feed: R-bloggers. Author: George Mount. Very happy to share that my DataCamp course “Survey and Measure Development in R” is now available. From the course description: How can we measure something like “brand loyalty?” It’s an obvious measure of interest to marketers, but we can’t quite take a ruler to it. Instead, we can design and analyze a survey to indirectly measure such a so-called “latent construct.” In this course, you’ll learn how to design and analyze a marketing survey to describe and even predict customers’ behavior based on how they rate items on “a scale of 1 to 5.” ... Read More

Feed: R-bloggers. Author: Thinking inside the box. A new version 0.4.9 of RQuantLib reached CRAN and Debian. It completes the change of some internals of RQuantLib to follow suit to an upstream change in QuantLib. We can now seamlessly switch between shared_ptr from Boost and from C++11 – Luigi wrote about the how and why in an excellent blog post that is part of a larger (and also excellent) series of posts on QuantLib internals. QuantLib is a very comprehensice free/open-source library for quantitative finance, and RQuantLib connects it to the R environment and language. The complete set of changes ... Read More

Feed: R-bloggers. Author: Econometrics and Free Software. Today I’ve removed my system’s R package and installed MRO instead. While re-installing all packages,I’ve encountered one of the most frustrating error message for someone installing packages fromsource: Error : /tmp/Rtmpw60aCp/R.INSTALL7819efef27e/xml2/man/read_xml.Rd:47: unable to load shared object '/usr/lib64/R/library/xml2/libs/xml2.so': libicui18n.so.58: cannot open shared object file: No such file or directory ERROR: installing Rd objects failed for package ‘xml2’ This library, libicui18n.so.58 is a pain in the butt. However, you can easily install it if youinstall miniconda. After installing miniconda, you can look for it with: [19-05-18 18:26] cbrunos in ~/ ➤ locate libicui18n.so.58 /home/cbrunos/miniconda3/lib/libicui18n.so.58 /home/cbrunos/miniconda3/lib/libicui18n.so.58.2 ... Read More

Feed: R-bloggers. Author: Anindya Mozumdar. If you search for the phrase “fastest man on earth” in Google, chances are that it will return the answer “Usain Bolt”. It certainly does so for me, even though the results might be different if Google decides to personalize the results for you. This is because currently he holds the world record for being the quickest (9.58s) to run a 100 metres race. Justin Gatlin once did it in 9.45s, but that does not count as the record because he was assisted by the wind. However, as statisticians, we know that a single data ... Read More

Feed: R-bloggers. Author: Jakob Gepp. On my daily commute to STATWORX, I pass the gas station down the street twice a day. Even though I’m riding a bike, I’m still looking at the gas prices. Lately, after a few weeks of observation, I thought to have found some patterns. My statistic sensors were tickling! Of course, I am not the first one to notice patterns. Nearly everyone has their own theory about when to buy cheap gas! Some of the more famous examples are: Everything was better in the old days It’s cheaper in the evening Gas stations at motorways ... Read More