UN public health data/Plotting countries and aggregations of countries in UN public health data

The plots included in the Wikiversity article on "UN public health data" can be reproduced by downloading the data from the appropriate UN website as described in the R Markdown code in the vignette below and "knitting" it in.

Process

 * 1) Open an instance of .  If you don't already have it installed, you can go to "RStudio Cloud" and click "get started for free" (at least as of 2020-10-24).  Or you can download and install free and open-source versions of it and R on your local computer.  R is available from The Comprehensive R Archive Network.  For RStudio, go to its website > Products (top center) > RStudio > "RStudio Desktop" > "Open Source Edition" > "Download RStudio Desktop".
 * 2) Start RStudio.  Then File > "New File" > "R Markdown..." > Title:  "Measuring Worth" > HTML > OK.
 * 3) Replace the default code in this new RMarkdown vignette on "Measuring Worth" with the text from the section below entitled, 'RMarkdown vignette on "Measuring Worth"'.
 * 4) Save.
 * 5) Click the "Knit" icon;  see the companion image.  Or read the text and run the code chunks one at a time manually.  The latter makes it relatively easy to look at intermediate computations carefully and experiment with changing things in different ways.