Tutorials

Introduction to Self Organizing Maps in R

This semester I’ve been playing around with Self Organizing Maps (SOMs) using the “kohonen” package in R. SOMs allow you to visualize very high dimensional data in a simplified two dimensional map which preserves proximity. I’ve written up an introductory tutorial on getting started making SOMs using the kohonen package:

https://clarkdatalabs.github.io/soms/

This workshop plays around with NBA player stats from the 2015/2016 season. Disclaimer: I know next to nothing about basketball.

Self Organizing Map depicting NBA Player Position Predictions

If you like this post, keep an eye out for the next one. In the next month I’ll put out a tutorial on using SOMs to visualize the text-mined works of Shakespeare. Disclaimer: I know next to nothing about the works of Shakespeare.

 

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Introduction to Mapping in R

One of the goals of the Digital Project Studio is to develop a set of helpful materials for people interested in various visualization tasks. Part of working towards this goal is cleaning up some already existing notes for in person workshops into usable standalone tutorials.

This workshop is designed to introduce you to some of the geospatial packages that can be used in R through a series of examples. It requires some experience with either the R language or with working with geospatial data. All the data necessary are provided in the download links at the top of the workshop page. The instructions are both on this webpage and in a pdf named script_markup.pdf in the downloaded files.

Mapping R Workshop

If you are interested in how we made the instructions for this workshop, check out our blog post:

Creating R Tutorials Using RMarkdown: Code Chunk Options

 

projects, Tutorials

Creating R Tutorials Using RMarkdown: Code Chunk Options

Two of us here in the Digital Project Studio have recently been working through an R script developed for a workshop on doing some basic mapping in R. The goal was to turn the script, which was used alongside in-person instruction, into a usable self-directed tutorial.  To do this we used R Markdown, an authoring platform that turns R scripts into reproducible and dynamic documents, presentations, and webpages. Our introductory tutorial will get you set up and started to using R Markdown. On this post we’ll share some of the additional features we’ve learned using this platform.

To find the actual R mapping workshop we created, the instructions and file downloads are accessible here: http://clarkdatalabs.github.io/mapping_R/

In the zipped file package you can find our R Markdown file for creating the instructions of the workshop: script_markup.Rmd

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