Preview data with either head or heaD

July 24, 2020 | Okan Bulut

R is a case sensitive programming language, which sometimes creates unusual and yet annoying problems for users. A common mistake that I often make when using R is to press the shift button too early when I use the head() function – which results in heaD(). However, this returns an error ... [Read more...]

River flow directions

July 23, 2020 | R on Dominic Royé

I recently created a visualization of the distribution of river flow directions and also of coastal orientations. Following its publication in social networks (here), I was asked to make a post about how I did it. Well, here we go to start with an example of rivers, coastal orientation is ...
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Supervised Machine Learning for Text Analysis in R

July 23, 2020 | rstats | Julia Silge

Today, Emil Hvitfeldt and I led a useR! 2020 online tutorial on predictive modeling with text using tidy data principles. This tutorial was hosted by R-Ladies en Argentina; huge thanks to the organizers for their leadership and effort in making this tutorial possible. Materials for this tutorial are available on GitHub, ...
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Weighting on a friend

July 23, 2020 | R on OSM

Our last few posts on portfolio construction have simulated various weighting schemes to create a range of possible portfolios. We’ve then chosen portfolios whose average weights yield the type of risk and return we’d like to achieve. However, we’ve noted there is more to portfolio construction than ...
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Building A Neural Net from Scratch Using R – Part 2

July 23, 2020 | R Views

Akshaj is a budding deep learning researcher who loves to work with R. He has worked as a Research Associate at the Indian Institute of Science and as a Data Scientist at KPMG India. In the previous post, we went through the dataset, the pre-processing involved, train-test split, and talked ...
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Refactor

July 22, 2020 | R | Gianluca Baio

This is quite exciting: since Nathan (this is his very interesting blog) has arrived to UCL a couple of months ago, we’ve started to work on quite a few of very interesting projects — including a major “refactoring” of the cod... [Read more...]

Demographic Modeling – Cluster analysis

July 22, 2020 | Corey Sparks, Ph.D.

In this topic, we will discuss Unsupervised Learning, or as we talked about last time, the situation where you are looking for groups in your data when your data don’t come with a group variable. I.e. sometimes you want to find groups of similar observations, and you need ...
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Bexar County Income Ratio

July 22, 2020 | Corey Sparks, PhD

This example shows how to calculate an index of income segregation for Bexar County, TX using data from the 2018 American Community Survey Some measures of economic segregation are calculated by the Census bureau directly, in the American Community Survey, the Census provides the Gini Index of income inequality for many ...
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Refactor

July 22, 2020 | R | Gianluca Baio

This is quite exciting: since Nathan (this is his very interesting blog) has arrived to UCL a couple of months ago, we’ve started to work on quite a few of very interesting projects — including a major “refactoring” of the code for BCEA. I’m obviously very attached to BCEA — ... [Read more...]

[The Art of] Regression and other stories

July 22, 2020 | xi'an

CoI: Andrew sent me this new book [scheduled for 23 July on amazon] of his with Jennifer Hill and Aki Vehtari. Which I read in my garden over a few sunny morns. And as Andrew and Aki are good friends on mine, this review is definitely subjective and biased! Hence to ...
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Archive Existing RDS Files

July 22, 2020 | Lukas Feick

In this blog post, our colleague Lukas gives you a high-level introduction to RDS files (vs. RData files) and serialization. The function checks whether there is already an RDS with the same name in the path, renames it if required, and provides it with a timestamp and a reference ARCHIVED_...
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