Philipp Janert

Philipp Janert

Areas of Expertise:

  • data analysis
  • data modeling
  • mathematical modeling
  • consulting
  • speaking
  • training
  • writing

Philipp K. Janert provides consulting services for data analysis and mathematical modeling, drawing on his previous careers as physicist and software engineer.

He is the author of the best-selling Data Analysis with Open Source Tools (O'Reilly), as well as Gnuplot in Action: Understanding Data with Graphs (Manning Publications). He has written for the O'Reilly Network, IBM developerWorks, and IEEE Software. He holds a Ph.D. in theoretical physics from the University of Washington.

Visit his company website at

D3 for the Impatient D3 for the Impatient
by Philipp Janert
May 2019
Print: $49.99
Ebook: $42.99

Feedback Control for Computer Systems Feedback Control for Computer Systems
by Philipp Janert
October 2013
Print: $39.99
Ebook: $33.99

Data Analysis with Open Source Tools Data Analysis with Open Source Tools
by Philipp Janert
November 2010
Print: $39.99
Ebook: $33.99

"I love this book a lot."
--Rik Farrow, ;login:

"This book is perfect for hands-on readers, wanting to achieve specific goals without getting entangled in formal definitions by getting right to the point. Here is an analogy: a Common Kite is depicted on the front cover of the book and as the bird waiting for its prey, you’ll be able to analyse the situation, understand it and take a clear decision after this read."
--Mathieu Hanna, Adviso

"This book offers a deep approach to real world tasks. There is much more text than code...It is hard to fault this book except perhaps that at nearly 500 pages, it is too short! "
--Neil McNaughton, Oil IT Journal

"Data analysis using open source tools is a straightforward, well explained and practical book which does not give just a laundry list of techniques but also useful pointers in how to use them intelligently. The strongly recommended."
--Manoj Rengarajan,

"Data Ana­lysis with Open Source Tools by Phil­ipp K Jan­ert is a simply superb, solid and exhaust­ive syn­thesis of instruc­tion, work­shops and hands-on exer­cises designed for those ser­i­ous about con­duct­ing pro­fes­sional data ana­lysis. This is not a light­weight under­tak­ing...All in all, this is a very good book. It actu­ally does more than it prom­ises and deliv­ers a com­pre­hens­ive and effect­ive course in data ana­lysis with superb hands-on exer­cises to drive home the learning."
--Shawn Day, randomosity