Ignore contigs for which there are no data points

open2c · Feb 9, 2017 · b9efd0f · b9efd0f
1 parent 08fb487
commit b9efd0f
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/cooler/_reader.py b/cooler/_reader.py
@@ -230,6 +230,9 @@ def size(self):
         return self.n_records
 
     def aggregate(self, chrom):
+        if chrom not in self.contigs:
+            return None
+
         import pysam
         filepath = self.filepath
         binsize = self.binsize