ROOT - Library

ROOT is an open source library created in 1994.

#976on PLDB

30Years Old

ROOT is an object-oriented program and library developed by CERN. It was originally designed for particle physics data analysis and contains several features specific to this field, but it is also used in other applications such as astronomy and data mining. Release 6.14.04 as of 2018-08-23. Read more on Wikipedia...

ROOT website
ROOT Wikipedia page
ROOT first developed in Conseil européen pour la recherche nucléaire or CERN
ROOT is written in C++
There is 1 Jupyter Kernel for ROOT
See also: (15 related languages)Linux, Solaris, IA-32, PostScript, SVG, LaTeX, Python, MATLAB, Matplotlib, SciPy, NumPy, Perl Data Language, Perl, R, IGOR Pro

Example from the web:

#include "Riostream.h"
void basic() {
// read file $ROOTSYS/tutorials/tree/basic.dat
// this file has 3 columns of float data
   TString dir = gROOT->GetTutorialDir();
   dir.Append("/tree/");
   dir.ReplaceAll("/./","/");
   ifstream in;
   in.open(Form("%sbasic.dat",dir.Data()));
   Float_t x,y,z;
   Int_t nlines = 0;
   auto f = TFile::Open("basic.root","RECREATE");
   TH1F h1("h1","x distribution",100,-4,4);
   TNtuple ntuple("ntuple","data from ascii file","x:y:z");
   while (1) {
      in >> x >> y >> z;
      if (!in.good()) break;
      if (nlines < 5) printf("x=%8f, y=%8f, z=%8f\n",x,y,z);
      h1.Fill(x);
      ntuple.Fill(x,y,z);
      nlines++;
   }
   printf(" found %d points\n",nlines);
   in.close();
   f->Write();
}