Publications by R Views
A Custom Forest Plot from Wonderful Wednesdays
Waseem Medhat is a Statistical Programmer and Computational Experimentalist who resides in Alexandria, Egypt This post takes a closer look at the forest plot that was mentioned in a previous post introducing PSI’s Wonderful Wednesdays events. It describes a custom version of a forest plot with additional bands to visualize heterogeneity between...
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SEM Time Series Modeling
Andrea Luciani is a Technical Advisor for the Directorate General for Economics, Statistics and Research at the Bank of Italy, and co-author of the bimets package. Structural Equation Models (SEM), which are common in many economic modeling efforts, require fitting and simulating whole system of equations where each equation may depend on the res...
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Dec 2020: “Top 40” New CRAN Packages
One hundred twenty-three new packages made it to CRAN in December. Here are my “Top 40” selections in nine categories: Computational Methods, Data, Genomics, Machine Learning, Medicine, Science, Statistics, Utilities, and Visualization. Computational Methods FKF.SP v0.1.0: Provides a fast and flexible Kalman filtering implementation utilizing...
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Some thoughts on rstudio::global talks
The fifty-five videos from last month’s rstudio::global conference are now available online. You will find them at the link above arranged in ten categories (Keynotes, Data for Good, Language Interop, Learning, Modeling, Organizational Tooling, Package Dev, Programming, Teaching, and Visualization) that reflect fundamental areas of technical an...
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R Interface for MiniZinc
Akshit Achara is a medical device engineer and computer science enthusiast based in Bengaluru, Karnataka, India. You can connect with Akshit on LinkedIn. Introduction Constraint programming is a paradigm for solving combinatorial problems that draws on a wide range of techniques from artificial intelligence, computer science, and operations rese...
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January 2020: “Top 40” New CRAN Packages
Two hundred thirty new packages made it to CRAN in January. Here are my “Top 40” selections in ten categories: Data, Finance, Genomics, Machine Learning, Medicine, Science, Statistics, Time Series, Utilities, and Visualization. Data igoR v0.1.1: Provides tools to extract information from the Intergovernmental Organizations (‘IGO’) Databas...
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2021 R Conferences
It is not yet clear what lasting impact the Covid-19 pandemic will ultimately have on R conferences. We are still adapting to our inability to attend large events, and trying to make the best of the “silver lining” of virtual events which permit worldwide participation. The following is an attempt to list 2021 conferences that are likely to h...
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Cheat Sheets
In a previous post, I described how I was captivated by the virtual landscape imagined by the RStudio education team while looking for resources on the RStudio website. In this post, I’ll take a look at Cheatsheets another amazing resource hiding in plain sight. Apparently, some time ago when I wasn’t paying much attention, cheat sheets evol...
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February 2021: “Top 40” New CRAN Packages
In February, two hundred forty-three new packages made it to CRAN, many of them very interesting and at least one entertaining. It was exceptionally difficult to pick the “Top 40”, but here they are, more or less, in eleven categories: Computational Methods, Data, Finance, Games, Genomics, Machine Learning, Mathematics, Medicine, Networks and...
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What does it take to do a t-test?
In this post, I examine the fundamental assumption of independence underlying the basic Independent two-sample t-test for comparing the means of two random samples. In addition to independence, we assume that both samples are draws from normal distributions where the population means and common variance are unknown. I am going to assume that you ...
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