Welcome my friend,
the data made by Pjotr from the CouchDB data base is put in a histogram. I have retrieved the data from the database with an R script which is put in a pipeline with the D3 script. This data is from the tumor values, try and hover over the bars to see some magic.
Cheers! Mehdi Nellen
Here you can find the R script: https://github.com/kroeliebuschie/troep/blob/master/assignment_3/parser.R