Comprehensive Introduction to Command Line for R Users

Too little time, too many things of interest. Here’s a resource that’s still on my to-do list: A Comprehensive Introduction to Command Line for R Users by rsquaredacademy.com In this tutorial, you will be introduced to the command line. We have selected a set of commands we think will be useful in general to a…

Generalized Additive Models Tutorial in R, by Noam Ross

Generalized Additive Models — or GAMs in short — have been somewhat of a mystery to me. I’ve known about them, but didn’t know exactly what they did, or when they’re useful. That came to an end when I found out about this tutorial by Noam Ross. In this beautiful, online, interactive course, Noam allows…

#100DaysOfCode: Machine Learning & Data Visualization

2018 seemed to be the year of challenges going viral on the web. Most of them were plain stupid and/or dangerous. However, one viral challenge I did like: #100DaysOfCode 1. Code minimum an hour every day for the next 100 days. 2. Tweet your progress every day with the #100DaysOfCode hashtag. 3. Each day, reach…

dygraphs

Today I learned about dygraphs, a fast, flexible open source JavaScript charting library. As everything in JavaScript, the charts produced by dygraphs integrate completely in the webbrowser and are thus very functional and interactive. See, for instance, the below where the graph highlights the y-axis value for both time series in the graph based on the x-axis…

Interactive Explanation of Network and Graph Principles

Why do groups of people act smart, dumb, kind, or cruel? People behave in strange ways, particularly when they are able to influence one another. Both good and bad things can happen when people interact and behave in network structures. On the bright side, you must be familiar with the wisdom of the crowd, where…

Hierarchical Linear Models 101

Multilevel models (also known as hierarchical linear models, nested data models, mixed models, random coefficient, random-effects models, random parameter models, or split-plot designs) are statistical models of parameters that vary at more than one level (Wikipedia). They are very useful in Social Sciences, where we are often interested in individuals that reside in nations, organizations, teams, or other higher-level units. Next to their individuals characteristics, the characteristics of…

Regular Expression Crosswords

A regular expression (regex or regexp for short) is a special text string for describing a search pattern. You can think of regular expressions as wildcards on steroids. You are probably familiar with wildcard notations such as *.txt to find all text files in a file manager. The regex equivalent is .*\.txt$. Last week I posted…

New to R? Kickstart your learning and career with these 6 steps!

For newcomers, R code can look like old Egyptian hieroglyphs with its weird operators (%in%,<-,||, or %/%). The R language has been said to have a steep learning curve and although there are many introductory courses and books (see R Resources), it’s hard to decide where to start. Fortunately, I am here to help! The below…

SQL resources (free courses, books, & cheat sheets)

My list of SQL resources is still quite short so if you have additions, please comment below or contact me! There are separate overviews for Data Science, Machine Learning, & Statistics resources and for R resources and Python resources. LAST UPDATED: 11-11-2018 Cheat sheets: SQL Basics cheat sheet MySQL cheat sheet by Dave Child SQL cheat sheet by sql-tutorial.net…