Nobody knows how to say goodbye, It seems so easy until you try (Nobody Knows, The Lumineers) I have been user of WordPress.com for (almost) three years and it has been a very good experience. But I want to take more control of my blog: install plugins, manage ads (... [Read more...]

Before we perform any analysis and come up with any assumptions about the distributions of and relationships between variables in our datasets, it is always a good idea to visualize our data in order to understand their properties and identify appropriate analytics techniques. In this post, let’s see the ... [Read more...]

If you use R eventually you will have to worry about scoping - we enumerate the basics and two major "gotcha's" to keep you safe from the most common stumbling blocks. [Read more...]

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The development of the bookdown package from RStudio in the summer of 2016 has facilitated greatly the ability of educators to create open-source materials for their students to use. It expands to more than just academic settings though and it … Continue reading → [Read more...]

In October of 2015, I released an R Markdown senior thesis template R package and discussed it in the blogpost here. It was well-received by students and faculty that worked with it and this past summer I worked on updating … Continue reading → [Read more...]

Introduction Suppose we have the task of predicting an outcome y given a number of variables v1,..,vk. We often want to “prune variables” or build models with fewer than all the variables. This can be to speed up modeling, decrease the cost of producing future data, improve robustness, improve ... [Read more...]

It has been well-known since at least 1969, when Bates and Granger wrote their famous paper on “The Combination of Forecasts”, that combining forecasts often leads to better forecast accuracy. So it is helpful to have a couple of new R packages whi... [Read more...]