gstlal_inspiral_plot_rankingstats_horizon: update docstring and fix

minor bug.

gstlal-inspiral/bin/gstlal_inspiral_plot_rankingstats_horizon

@@ -29,7 +29,8 @@ from gstlal.plots import horizon
 from lal.utils import CacheEntry
 
 def parse_command_line():
-	parser = OptionParser(description = __doc__)
+	usage = "Usage: %prog [options] file1 file2 ..."
+	parser = OptionParser(description = __doc__, usage = usage)
 
 	parser.add_option("-o", "--outdir", default = ".", help = "Set the output directory. By default, current directory will be used.")
 	parser.add_option("-f", "--format", default = "png", help = "Set the output format. By default, the output will be a png file.")

gstlal-inspiral/python/plots/horizon.py

@@ -73,12 +73,16 @@ class HorizonDistance:
 
 		Returns:
 			An instance of HorizionDistance.
+
+		Note:
+			The ranking statistic files are expectd to be in the same
+			template bank bin.
 		"""
 		loader = cls.datasource_loader(sources)
 		urls = loader(sources)
 		rankingstat = far.marginalize_pdf_urls(urls, "RankingStat", verbose = verbose)
 		horizon_history_dict = rankingstat.numerator.horizon_history
-		return cls(horizon_history_dict)
+		return cls(horizon_history_dict, verbose=verbose)
 
 	@classmethod
 	def from_psds(cls, sources, verbose=False):
@@ -100,7 +104,7 @@ class HorizonDistance:
 			for ifo, psd in psds.items():
 				if psd is not None:
 					horizon_history_dict[ifo].update({int(psd.epoch): HorizonDistance(10., 2048., psd.deltaF, 1.4, 1.4)(psd, 8.)[0]})
-		return cls(horizon_history_dict)
+		return cls(horizon_history_dict, verbose=verbose)
 
 	@staticmethod
 	def datasource_loader(sources):
@@ -160,7 +164,7 @@ class HorizonDistance:
 			ax[1].hist(horizon_dist, binvec, alpha = 0.5, color = plotutil.colour_from_instruments([ifo]), label = ifo)
 
 		if self.verbose:
-			sys.stderr.write("plotting " + output)
+			sys.stderr.write("plotting " + str(output) + "\n")
 
 		ax[0].set_xlabel("Time (ks) from GPS {:d}".format(mint))
 		ax[0].set_ylabel("Mpc")