Introduction This is the 16th post in the series Elegant Data Visualization with ggplot2. In the previous post, we learnt how to modify the legend of plot when shape is mapped to categorical variables. In this post, we will learn to modify the following using scale_size_continuous when size ...

I am happy to say that the latest issue of The R Journal includes a paper describing rentrez, the rOpenSci package for retrieving data from the National Center for Biotechnology Information (NCBI). The NCBI is one of the most important sources of biological data. The centre provides access to information ...

This post introduces a new R package I am working on called tabr for creating guitar tablature (“tabs”) from R code. The tabr package provides programmatic music notation and a wrapper around LilyPond for creating quality guitar tablature. tabr offers functions for describing and organizing musical structures and wraps around ...

I’ve been asked more and more for hints and best practices when working with R. It can be a daunting task, depending on how deep or specialised you want to be. So I tried to keep it as balanced as I could and mentioned point that definitely helped me ...

Highlights from Conference on Statistical Practice. Friday 2/16/2018 8:00 AM Keynote Address & 9:15 AM Working with Messy Data 11:00 AM Streamlining Your Work Using (Shiny) Apps 2:00 PM Data Mining Algorithms / Presenting and Storytelling 3:45 PM Working with Health Care Data Posters I Wish I’d Seen Additional Sessions I Wish I’d Attended Saturday 2/17/2018 9:15 AM ...

Kids today are so sophisticated (at least they are in New York City, where I live). While I didn’t hear about the chi-square test of independence until my first stint in graduate school, they’re already talking about it in high school. When my kids came home and started ...

R tip: use stringsAsFactors = FALSE. R often uses a concept of factors to re-encode strings. This can be too early and too aggressive. Sometimes a string is just a string. Sigmund Freud, it is often claimed, said: “Sometimes a cigar is just a cigar.” To avoid problems delay re-encoding of ...