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#!/usr/bin/env python
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## Created by Jeff Klukas (klukas@wisc.edu), November 2009
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## For more information, use the -h option:
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## ./overlayHists.py -h
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## Define usage string for help option
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usage="""usage: %prog [options] file1.root file2.root file3.root ...
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function: overlays corresponding histograms from several files, dumping the
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images into an identical directory structure in the local directory
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and also merging all images into a single file (if output is pdf)
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naming: histograms whose names contain certain key terms will be handled
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specially. Use this to your advantage!
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'Eff' : y-axis will be scaled from 0 to 1
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'Norm': plot will be area normalized
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'Logx': x-axis will be on log scale
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'Logy': y-axis will be on log scale"""
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## Define colors
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rgbvals = [[82, 124, 219],
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[145, 83, 207],
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[231, 139, 77],
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[114, 173, 117],
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[67, 77, 83]]
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## Import python libraries
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import sys
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import optparse
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import os
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import re
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## Import ROOT in batch mode
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if '-h' not in sys.argv:
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sys.argv.append('-b')
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import ROOT
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if os.path.exists('rootlogon.C'): ROOT.gROOT.Macro('rootlogon.C')
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sys.argv.remove('-b')
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ROOT.gErrorIgnoreLevel = ROOT.kWarning
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colors = [ROOT.TColor.GetColor(rgb[0], rgb[1], rgb[2]) for rgb in rgbvals]
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c1 = ROOT.TCanvas()
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## Parse options
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parser = optparse.OptionParser(usage=usage)
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parser.add_option('-n', '--normalize', action="store_true", default=False,
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help="area normalize all histograms")
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parser.add_option('-e', '--ext', default="pdf",
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help="choose an output extension; default is pdf")
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parser.add_option('-o', '--output', default="overlaidHists", metavar="NAME",
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help="name of output directory; default is 'overlaidHists'")
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parser.add_option('-m', '--match', default="", metavar="REGEX",
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help="only make plots for paths containing the specified "
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"regular expression (use '.*' for wildcard)")
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options, arguments = parser.parse_args()
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plot_dir = "%s/%s" % (os.path.abspath('.'), options.output)
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regex = re.compile(options.match)
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class RootFile:
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def __init__(self, file_name):
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self.name = file_name[0:file_name.find(".root")]
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self.file = ROOT.TFile(file_name, "read")
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if self.file.IsZombie():
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print "Error opening %s, exiting..." % file_name
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sys.exit(1)
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def Get(self, object_name):
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return self.file.Get(object_name)
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def main():
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files = [RootFile(filename) for filename in arguments]
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if len(files) == 0:
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parser.print_help()
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sys.exit(0)
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process_directory("", files)
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if options.ext == "pdf":
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os.system("gs -q -dBATCH -dNOPAUSE -sDEVICE=pdfwrite "
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"-dAutoRotatePages=/All "
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"-sOutputFile=%s.pdf " % options.output +
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"[0-9][0-9][0-9].pdf")
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os.system("rm [0-9]*.pdf")
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print "Wrote %i plots to %s" % (next_counter() - 1, options.output)
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def process_directory(path, files):
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dir_to_make = "%s/%s" % (plot_dir, path)
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if not os.path.exists(dir_to_make):
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os.mkdir(dir_to_make)
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keys = files[0].file.GetDirectory(path).GetListOfKeys()
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key = keys[0]
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while key:
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obj = key.ReadObj()
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key = keys.After(key)
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new_path = "%s/%s" % (path, obj.GetName())
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if obj.IsA().InheritsFrom("TDirectory"):
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process_directory(new_path, files)
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if (regex.search(new_path) and
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obj.IsA().InheritsFrom("TH1") and
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not obj.IsA().InheritsFrom("TH2") and
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not obj.IsA().InheritsFrom("TH3")):
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counter = next_counter()
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name = obj.GetName()
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hist = files[0].file.GetDirectory(path).Get(name)
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title = hist.GetTitle()
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x_title = hist.GetXaxis().GetTitle()
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y_title = hist.GetYaxis().GetTitle()
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if "Norm" in name or options.normalize:
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y_title = "Fraction of Events in Bin"
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hist.Draw()
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stack = ROOT.THStack("st%.3i" % int(counter), title)
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legend_height = 0.04 * len(files) + 0.02
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legend = ROOT.TLegend(0.65, 0.89 - legend_height, 0.87, 0.89)
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c1.SetLogx("Logx" in name)
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c1.SetLogy("Logy" in name)
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for i, file in enumerate(files):
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hist = file.file.GetDirectory(path).Get(name)
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if not hist: continue
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hist.Draw()
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hist.SetTitle(file.name)
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color = colors[i % len(colors)]
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hist.SetLineColor(color)
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hist.SetMarkerColor(color)
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hist.SetMarkerStyle(i + 1)
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if "Norm" in name or options.normalize:
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integral = hist.Integral()
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hist.Scale(1. / integral)
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stack.Add(hist)
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legend.AddEntry(hist)
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stack.Draw("nostack p H")
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stack.SetTitle("%s;%s;%s" % (title, x_title, y_title))
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if "Eff" in name:
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stack.Draw("nostack e p")
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stack.SetMaximum(1.)
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stack.SetMinimum(0.)
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legend.Draw()
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if options.ext == "pdf":
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c1.SaveAs("%.3i.pdf" % counter)
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c1.SaveAs("%s/%s/%s.%s" % (plot_dir, path, name, options.ext))
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def counter_generator():
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k = 0
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while True:
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k += 1
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yield k
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next_counter = counter_generator().next
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if __name__ == "__main__":
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sys.exit(main())
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