University of Wisconsin–Madison

Category: R

Google colab is a free cloud notebook environment

Introduction Google Colab is a  free cloud-based service that allows the execution of Python code using the Jupyter Notebook format. It is possible to use and install new python libraries. Furthermore it is possible to provide bash commands from the notebook and there are backdoor ways to even use R. The Python code uses only …

Data Analysis Workshops Winter 2021

SUMMARY: Check calendar for Free “R” and “Python” workshops (Steenbock Library.) “Introduction to R with RStudio,” “Data Wrangling in R” (SSCC – Social Science Computing Cooperative.) “Automating Tasks with the Unix Shell,” “Data Management with SQL,” “R: introduction / visualization / reports” (Software Carpentry through UW-Madison Data Science (fees apply).)

Strings as factors in R

Factors in R I recently mentioned the important default change that occurred with the release of the latest version of R (version 4.0.3) in a post titled  Default preference reversal in R and how that can impact current code. Recently I had 2 more encounters with this notion and I thought I’d write here how …

Default preference reversal in R

Default preferences I enjoy using R and RStudio, but I am always weary of upgrading R because that usually leads to some issue(s). The most recent was a bit long for me to diagnose, even though in retrospect it is a simple change in default preference, namely changing the default setting default.stringsAsFactors() from  TRUE in …

Data Analysis Workshops Fall 2020

SUMMARY: Check calendar for Free “R” and “Python” workshops (Steenbock Library.) “Introduction to R with RStudio,” “Data Wrangling in R” (SSCC – Social Science Computing Cooperative.) “Automating Tasks with the Unix Shell,” “Data Management with SQL,” “Introduction to Docker” (Software Carpentry through UW-Madison Data Science (fees apply).)

Tabular data analysis with R and Tidyverse

Does data analysis feel like the impossible job of “catching the moon?”
Fortunately R and RStudio are great tools to analyze data and illustrate conclusions, while at the same time keeping records and create “live” documents that can be updated with “just one click.”
The material is written in a way that is conducive to “learn by doing” following demonstrations and examples. All code and all necessary materials and files are available and therefore it is possible to learn and acquire proficiency on one’s own with this course content.

Covid-19 Coloring Book and PyMOL scripts book

Update 1: reported in the CALS eNewsletter on April 17 [Archived May 2, 2020] Update 2: I compiled a table with more Covid-19 coloring books from other inspired sources. Friday, April 10, 2020 (“Good Friday”) I have created a booklet titled “SARS-CoV-2 – COVID-19 | A Coloring Book” that parents who are spending a lot …

R courses and tutorials. Classic, Tidyverse, Data Wrangling, ggplot2

This is a list of R material that I found online that I think can be useful as reference or as working material to learn R / RStudio / Mardkown. I’ll try to separate the links between “Classic” and “Tidyverse” versions, but that is not always possible… “Tidyverse” would include plotting with ggplot2 R package which …

TableConvert.com – free tabular data formats converter

Tabular formats When I first came to Madison in 1986 as a postdoc with Biochemistry professor Paul Kaesberg to learn cloning and sequencing, I was surprised when he said that the most important program to work with sequences was the (now defunct GCG) program REFORMAT. And “boy” was he right, as in my 30+ years …

R/Python/Reproducible Research Workshops on Campus – Winter 2020

Winter 2020 Programming Workshops on Campus In the past years I have offered python 3, R, and RStudio workshops within the Biochem Department (see links below.) R is both a language and a software environment for statistical computing and graphics. R (and other languages) can be used through the amazing RStudio interface for even more performance, ease …