Overview and Setting Python and R have become the most important languages in analytics and data science. Usually a data scientist can at least navigate one language with relative ease and at STATWORX we luckily have both expertises available. While, with enough will and effort, any coding project can be ...

Trick question: is a 10,000 cell numeric data.frame big or small? In the era of "big data" 10,000 cells is minuscule. Such data could be fit on fewer than 1,000 punched cards (or less than half a box). The joking answer is: it is small when they are selling you the system, ...

Make memorable plots with memery. memery is an R package that generates internet memes including superimposed inset graphs and other atypical features, combining the visual impact of an attention-grabbing meme with graphic results of data analysis. Version 0.4.2 of memery is now on CRAN. The latest development version and a package ...

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Have you spent hours, pulling your hair out trying to figure out how to access datasets in R? Once imported to a variable, columns from a dataset (eg: CSV) can be very tricky to access. Sometimes columns contain spaces, funky characters or other incosistencies. Here are some examples on how ...

Owen Jones, Placement Student Songwriting is a very mysterious process. It feels like creating something from nothing. It’s something I don’t feel like I really con...

By Gabriel Vasconcelos Overview There are several ways to do portfolio optimization out there, each with its advantages and disadvantages. We already discussed some techniques here. Today I am going to show another method to perform portfolio optimization that works … Continue reading →

Introduction This is the 13th post in the series Elegant Data Visualization with ggplot2. In the previos post, we learnt how to modify the axis of plots. In this post, we will focus on modifying the appearance of legend of plots when the aesthetics are mapped to variables. Specifically, we ...

I am very pleased to tell you that the next version of tidygraph (1.1) is now available on CRAN. This is not a bug-fix release, nor a change-it-all release, but rather a more-of-it-all release, and in this post I’m going to tell you all about it. The idea of tidygraph ...

[update: the data.world connector is now available in beta, as a preview feature in Power BI. However, this post is relevant in case you’d like to manage what you retrieve through your own code] data.world is a website promising “open, secure, social, and linked” data sets. Using ...

Previously we’ve covered the basics of exogenous variables in smooth functions. Today we will go slightly crazy and discuss automatic variables selection. But before we do that, we need to look at a Santa’s little helper function implemented in [crayon-5a7f874ccc437104037960-i/]. It is called [crayon-5...

Overview Normal distribution Multivariate normal distribution Beta distribution Dirichlet distribution Gamma and lognormal distributions Uniform distribution Performing a PSA Overview Decisions to adopt or reimburse health technologies are often guided by cost-effectiveness analyses. The outcomes needed to conduct cost-effectiveness analyses are simulated using decision-analytic models, which combine information from multiple ...