--- a/numerics/histogram.py	Sun Mar 01 07:53:23 2015 -0800
+++ b/numerics/histogram.py	Sun Mar 01 08:23:18 2015 -0800
@@ -23,6 +23,7 @@
 import os
 import sys
 import time
+from .data import transpose
 from .read import CSVParser
 from collections import OrderedDict
 
@@ -86,6 +87,13 @@
     parser = HistogramParser()
     options = parser.parse_args(args)
 
+    # read data
+    data = parser.read()
+    if not data:
+        parser.error("No data given")
+
+    # transpose to columns
+    columns = transpose(data)
 
 if __name__ == '__main__':
     main()