Meeting 2016 04 26

Date: 26th April 2016

Time: 12:00 - 13:00 UK

Room: 532 Blackett, 40-R-D10 CERN

Indico Link: https://indico.cern.ch/event/524794/

Vidyo link: https://vidyoportal.cern.ch/flex.html?roomdirect.html&key=jWovOD3i3Wr9oDDLFka32uHn48w

Topic: ROOT Tips and Tricks and Questions

• Ben:
  • TDirectory::TContext
  • Colour pallette
  • TTree::SetAlias
  • TTreeFormula and special TTree::Draw expressions
  • TGAxis
  • THStack
  • Latex in titles
  • Retrieving objects from: TCanvas, TH1, THStack, TDirectory etc
  • Obtaining colours from a colour pallette:

    // Scale value to an index between 0 and the number of colours in the pallette
    double colorIndex=(value-minimum_value)/maximum_value*gStyle->GetNumberOfColors();
    // Map the index in the pallette to an actual colour value
    int colour=gStyle->GetColorPalette(colorIndex); `

• Oliver:
  • Exporting plots straight to LaTeX
  • Troubleshooting TCanvas?
  • Don't forget auto, smart pointers and templates if on C++11 (within reason)
• Ray:
  • Tracing images in ROOT