horizon.py: add global min and max horizon distance properties.

gstlal-inspiral/python/plots/horizon.py

@@ -57,6 +57,8 @@ class HorizonDistance:
 		Returns:
 			An instance of HorizionDistance.
 		"""
+		self._min = None
+		self._max = None
 		self.verbose = verbose
 		self.horizon_history_dict = horizon_history_dict
 
@@ -133,6 +135,28 @@ class HorizonDistance:
 
 		raise UnknownExtensionError("Cannot determine the extension of the input data sources, please prepare files with the following extension: ('.gz' or '.cache').")
 
+	@property
+	def min(self):
+		"""Return the global minimum of the horizon distance."""
+		if self._min:
+			return self._min
+		gminh = 1e32
+		for ifo, history in self.horizon_history_dict.items():
+			gminh = min(gminh, min(history.values()))
+		self._min = gminh
+		return gminh
+
+	@property
+	def max(self):
+		"""Return the global minimum of the horizon distance."""
+		if self._max:
+			return self._max
+		gmaxh = -1e32
+		for ifo, history in self.horizon_history_dict.items():
+			gmaxh = max(gmaxh, max(history.values()))
+		self._max = gmaxh
+		return gmaxh
+
 	def savefig(self, output, figsize=(12,4), limits=None, title=None):
 		"""Save the horizon distance plot to disk.