This is more written as an aide-memoire to myself than anything. It’s a process I’m currently using for bulk-processing a set of documents of various forms (MS Word, PPT, PDF, LibreOffice etc), converting them all to PDF, running OCR on any embedded images and then sticking the end-result into Elasticsearch via Tika (not documented, plenty documentation elsewhere re this final step).

See the UI here Following on from here and here, this is just putting together a couple of blocks from bl.ocks.org to plot data from the PhysioNet site. Read converting PhysioNet JSON to CSV to import other data sets.

PhysioNet data is available in binary (dat) form but their web site also provides records in JSON. These records include samples / measurements from 12-lead ECGs recorded at 1ksps. To convert these to CSV we can use the ol’ jq:

Another one for the todo list. Fancy plotting leads I/II/III out and making and interactive scroller for time vs vector / direction. Input data might be from here or here. Unfortunately both of these are for synthesising a single lead.

Note this requires Macports It’s 3am and you’re hunting for that graph you clipped a couple of weeks ago. Report is due in for 10 the next morning. You swore up and down you’d never do this again, but here we are, can’t find the file or the reference.