ruby root - Why appears TCanvas?

From: Robert Riemann <robert.riemann_at_physik.hu-berlin.de>
Date: Fri, 29 Jan 2010 00:48:47 +0100

Hi rooters,

I want to plot my histograms using the ruby module from root. The result is fine, but I wonder why the canvas are shown to me one after each other up the end of program.

Is it possible to disable graphics in the ruby module?

Regards,
Robert

Script with highlighting: http://pastie.org/799713 Script:

#!/usr/bin/ruby

require 'libRuby'

hist_names = %w{ DiJet_R_diff DiJet_R_diff_after_boost DiJet_angle_after_boost
                 DiJet_phi_diff Jet_acoplanarity Jet_aplanarity Jet_centrality
                 Jet_sphericity Jet_thrust }

hist_names.map! do |element|
  element = "reco_" + element
end

dataFileName = ARGV[0]
dataOutputFileNameSuffix = "_hist.png"
dataOutputFolder = "plots/" # have to be created manually size = [800, 600]
options = ""

file = TFile.new dataFileName
hist_names.each do |hist_name|
  histogram = file.Get( hist_name )
  canvas = TCanvas.new("canvas_" + hist_name , hist_name, size[0], size[1])   histogram.Draw( options )
  canvas.SaveAs( dataOutputFolder + hist_name + dataOutputFileNameSuffix ) end Received on Fri Jan 29 2010 - 00:48:51 CET