Hyetographs, hydrographs and highcharter

Dual y-axes: yes or no? What about if one of them is also reversed, i.e. values increase from the top of the chart to the bottom?

Judging by this StackOverflow question, hydrologists are fond of both of these things. It asks whether ggplot2 can be used to generate a “rainfall hyetograph and streamflow hydrograph”, which looks like this:

PubMed searching: experiments in Javascript

Andrew asks:

…anyone know of a tool that will take a pubmed query and plot the number of articles by year?

I figured that this was a good excuse to improve my lowly Javascript skills by building a toy web application.