Main Histogram Changes in ROOT 6

 Here is a list of the main changes which have been applied to the histogram classes in ROOT 6. These changes affect the behaviour of the histogram classes and explain why for some cases the same code would give a different outcome than in ROOT 5. 


Saving Canvas in TeX

Example of TTextDump usage

Being able to generate TeX graphics can be useful for several reasons:

ROOT6 and Backward Compatibility

Hi everyone, dear Matt!

Matt Walker has posted an extensive review of ROOT and what he would hope the future of ROOT to be. Because I think many of his comments are good ones, and because I have heard some of them from several people in the past, I decided to give the answer to an audience that's little bit wider, in a dedicated post.

Defining C++14


A new C++ meeting is coming up in a few days. Many, many proposals are on the table; they can be found here and here. Out of those proposals only very few will be discussed at the meeting; likely only those that are about to make it into C++14.

Rainbow ?

The rainbow colormap is not the best choice to represent data using pseudo colors. This article is a study (using "Higgs data") showing why the rainbow colormap can be misleading and what could be better alternatives.

On the way to ROOT 6


We are running late with ROOT 6, in part because I'm just back at work after being sick for 4 weeks. The other cling team members were hacking away at Fermilab, and I'll demonstrate how major that step to version 6 is for ROOT.



Two weeks ago I participated at the ISO C++ standard meeting. It was my and CERN's first one and a pleasant surprise. A few news items:

Cling integrated in our CI tool

It's been a while since the last activity on our blog. However, it doesn't mean that we are not spending every minute to work on improving the ROOT Framework.

Google, cling and python


A delegation of the ROOT team (Fons, Vassil and I) have been invited by Google Zurich to give a Tech Talk on cling. We had a great night in Zurich. Great nights always have consequences on the next day - but as "talk quality" and "nightlife fun" are in different dimensions there is no obvious measure for optimizing these two; everyone will have his or her own favorite combination of both. Mine meant Aspirin the next morning.

Christmas Tree


I wish you a relaxing break - be it Christmas, Hanukah, family or presents. All the best for next year: start off with a good party, go on with successful physics and a happy private life! And where applicable, please continue to use ROOT in 2012 ;-)

As a little ROOTy Christmas gift, enjoy this old but still fantastic xkcd episode (read this for explanations):

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