Getting Started with D3.js Topographic Maps using topojson

Getting Started with D3.js Topographic Maps using topojson

Topography is a detailed map of the surface features of land. It includes the mountains, hills, creeks, and other bumps and lumps on a particular hunk of earth. This handy word is a Greek-rooted combo of topos meaning “place” and graphein “to write."

Interactive D3.js Chord Diagrams with Meditech Data Repository.

Interactive D3.js Chord Diagrams with Meditech Data Repository.

If you’re considering building a Chord Diagram with D3, you’ve probably read how challenging they are. This reputation discouraged me from tackling one for quite some time until I stumbled on an excellent post from Steve Hall. He has managed to bury all of the heavy lifting in a couple of generic helper functions.

<h2>Fixing MacVim on OSX Yosemite 10.10</h2>

Fixing MacVim on OSX Yosemite 10.10

OSX 10.10 (Yosemite) seems to break the much loved MacVim. Attempts to recompile MacVim from the source code with the instructions in the README_mac.txt produces some variation on the following error.

<h2>Using R-Studio with Meditech Data Repository</h2>

Using R-Studio with Meditech Data Repository

I’m often asked about my tool set for working with the Meditech Data Repository (DR) to mine clinical data. In most cases I use the tools that come bundled with the underlying MS SQL Server. They cost nothing extra, so there’s no excuse for not using them.

<h2>Powershell Example: Regex style file processing to remove quotation marks and insert new line breaks.</h2>

Powershell Example: Regex style file processing to remove quotation marks and insert new line breaks.

Working with machine generated data files, you often find yourself having to pre-process them into a friendlier form. For example, extracting Quality data out of an Electronic Health Record (EHR) system to send to an Insurance Company. This activity would be the “T” in Extract, Transform and Load (ETL) and this post illustrates how to do it with a tool you probably already have.

<h2>International Classification of Diseases (ICD).</h2>

International Classification of Diseases (ICD).

Getting editions Nine (ICD9) & Ten (ICD10) into a relational database can be tricky, even though these ontologies are available free online from numerous US government websites. Finding them in data science-friendly formats can be time consuming and frustrating. So in this post I’ll outline how and where to obtain them, cleanse them and get them into a simple database for use elsewhere. Hopefully saving you hours of unnecessary searching or using data sets of uncertain provenance.

Test Post
  • Written by Colin A. White
  • May 7th, 2014
  • About Random

Test Post

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