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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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## Updated January 2010
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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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most style options can be controlled from your rootlogon.C macro"""
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#### Define colors and styles
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rgbvals = [[82, 124, 219],
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[212,58,143],
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[231, 139, 77],
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[145, 83, 207],
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[114, 173, 117],
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[67, 77, 83]]
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marker_styles = [3, 4, 5, 25, 26, 27, 28, 30]
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#### Import python libraries
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import sys
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import optparse
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import shutil
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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 and len(sys.argv) > 1:
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sys.argv.append('-b')
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import ROOT
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if os.path.exists('rootlogon.C'):
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ROOT.gROOT.Macro('rootlogon.C')
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else:
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os.system('echo -e "{\n}\n" >> rootlogon.C')
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ROOT.gROOT.Macro('rootlogon.C')
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os.remove('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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canvas = ROOT.TCanvas()
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#### Parse options
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parser = optparse.OptionParser(usage=usage)
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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', '--opt', default="",
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help="pass OPT to the Draw command (try 'e' for error bars)")
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parser.add_option('-m', '--markers', action="store_true", default=False,
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help="add markers to histograms")
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parser.add_option('-s', '--special', action="store_true", default=False,
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help="enable name-based special plotting options "
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"(see below)")
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parser.add_option('--output', default="overlaidHists", metavar="NAME",
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help="name of output directory; default is 'overlaidHists'")
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parser.add_option('--numbering', action="store_true", default=False,
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help="add a page number in the upper right of each plot")
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parser.add_option('--timing', action="store_true", default=False,
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help="output timing information")
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parser.add_option('--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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group1 = optparse.OptionGroup(
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parser,
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"special plotting options",
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"These options can be applied to all plots or to only specific plots "
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"you choose. To affect all plots, simply include the option on the "
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"command line. With the '-s' option, however, you may instead include "
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"a keyword (such as 'Norm') in the ROOT name of a histogram and it will "
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"always have that option turned on."
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)
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group1.add_option('-n', '--normalize', action="store_true", default=False,
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help="'Norm': area normalize the histograms")
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group1.add_option('--efficiency', action="store_true", default=False,
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help="'Eff' : force y axis scale to run from 0 to 1")
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group1.add_option('--logx', action="store_true", default=False,
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help="'Logx': force log scale for x axis")
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group1.add_option('--logy', action="store_true", default=False,
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help="'Logy': force log scale for y axis")
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group1.add_option('--overflow', action="store_true", default=False,
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help="'Overflow' : display overflow content in highest bin")
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group1.add_option('--underflow', action="store_true", default=False,
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help="'Underflow': display underflow content in lowest bin")
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parser.add_option_group(group1)
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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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#### Define classes and utility functions
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class RootFile:
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"""A wrapper for TFiles, allowing quick access to the name and Get."""
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def __init__(self, file_name):
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self.name = file_name[0:-5]
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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 counter_generator():
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"""Incremement the counter used to number plots."""
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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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#### Define the main program functions
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def main():
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"""Initialize files and enter into process_directory loop"""
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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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print ""
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if options.ext == "pdf":
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merge_pdf()
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def process_directory(path, files):
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"""Loop through all histograms in the directory and plot them."""
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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 obj is a desired histogram, process it
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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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process_hist(path, new_path, files, obj)
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#### This is where all the plotting actually happens
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def process_hist(path, new_path, files, obj):
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"""Overlay the plots and apply options."""
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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 options.normalize or (options.special and "Norm" in name):
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y_title = "Fraction of Events in Bin"
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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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canvas.SetLogx(options.logx or (options.special and "Logx" in name))
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canvas.SetLogy(options.logy or (options.special and "Logy" in name))
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#### Fill the THStack with histograms from each file
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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.SetTitle(file.name)
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color = colors[i % len(colors)]
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hist.SetLineColor(color)
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if options.markers:
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hist.SetMarkerColor(color)
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hist.SetMarkerStyle(marker_styles[i])
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else:
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hist.SetMarkerSize(0)
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if options.overflow or (options.special and "Overflow" in name):
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nbins = hist.GetNbinsX()
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overflow = hist.GetBinContent(nbins + 1)
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hist.AddBinContent(nbins, overflow)
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if options.underflow or (options.special and "Underflow" in name):
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underflow = hist.GetBinContent(0)
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hist.AddBinContent(1, underflow)
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if options.normalize or (options.special and "Norm" in name):
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integral = hist.Integral()
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if integral: hist.Scale(1. / integral)
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stack.Add(hist)
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legend.AddEntry(hist)
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#### Draw the stack and apply text overlays
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stack.Draw("nostack p H" + options.opt)
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stack.SetTitle("%s;%s;%s" % (title, x_title, y_title))
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if options.numbering:
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display_page_number(counter)
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if options.efficiency or (options.special and "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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if options.overflow or (options.special and "Overflow" in name):
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display_overflow(stack, hist)
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if options.underflow or (options.special and "Underflow" in name):
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display_underflow(stack, hist)
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legend.Draw()
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save_plot(stack, plot_dir, path, name, counter)
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#### Define the extra functions used by the main routines
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def save_plot(stack, plot_dir, path, name, counter):
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output_file_name = "%s/%s/%s.%s" % (plot_dir, path, name, options.ext)
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canvas.SaveAs(output_file_name)
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if options.ext == "pdf":
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numbered_pdf_name = "%.3i.pdf" % counter
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shutil.copy(output_file_name, numbered_pdf_name)
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report_progress(counter, 1)
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def report_progress(counter, divisor):
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if counter % divisor == 0:
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print "\r%i plots written to %s" % (counter, options.output),
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sys.stdout.flush()
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def merge_pdf():
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print "Writing merged 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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def display_page_number(page_number):
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page_text = ROOT.TText()
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page_text.SetTextSize(0.03)
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page_text.SetTextAlign(33)
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page_text.DrawTextNDC(0.97, 0.985, "%i" % page_number)
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def display_overflow(stack, hist):
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nbins = hist.GetNbinsX()
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x = 0.5 * (hist.GetBinLowEdge(nbins) +
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hist.GetBinLowEdge(nbins + 1))
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y = stack.GetMinimum("nostack")
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display_bin_text(x, y, nbins, "Overflow")
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def display_underflow(stack, hist):
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nbins = hist.GetNbinsX()
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x = 0.5 * (hist.GetBinLowEdge(1) +
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hist.GetBinLowEdge(2))
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y = stack.GetMinimum("nostack")
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display_bin_text(x, y, nbins, "Underflow")
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def display_bin_text(x, y, nbins, text):
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bin_text = ROOT.TText()
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bin_text.SetTextSize(min(1. / nbins, 0.04))
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bin_text.SetTextAlign(12)
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bin_text.SetTextAngle(90)
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bin_text.SetTextColor(13)
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bin_text.SetTextFont(42)
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bin_text.DrawText(x, y, text)
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#### Run main program
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if __name__ == "__main__":
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if options.timing:
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import profile
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profile.run('main()', 'fooprof')
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import pstats
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p = pstats.Stats('fooprof')
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p.sort_stats('cumulative').print_stats(15)
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else:
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sys.exit(main())
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