--- a/numerics/convert.py	Fri May 15 16:35:34 2015 -0700
+++ b/numerics/convert.py	Fri May 15 16:59:09 2015 -0700
@@ -11,11 +11,13 @@
 from .data import transpose
 from .read import read_csv, CSVParser
 
-__all__ = ['default_cast',
+__all__ = ['numeric',
+           'default_cast',
            'cast',
            'float_or_orig',
            'main']
 
+numeric = (int, float)
 default_cast = (int, float, str)
 
 def cast(to_type, *values):

--- a/numerics/normalize.py	Fri May 15 16:35:34 2015 -0700
+++ b/numerics/normalize.py	Fri May 15 16:59:09 2015 -0700
@@ -7,10 +7,17 @@
 
 # imports
 import sys
+from .convert import numeric
+from .data import transpose
 from .manipulate import ManipulationParser
 
 # module globals
-__all__ = ['main', 'NormalizationParser']
+__all__ = ['normalize', 'NormalizationParser']
+
+def normalize(*data):
+    """normalize data"""
+    norm = float(sum(data))
+    return [i/norm for i in data]
 
 class NormalizationParser(ManipulationParser):
     """CLI option parser"""
@@ -23,6 +30,15 @@
     parser = NormalizationParser()
     options = parser.parse_args(args)
 
+    # get columns
+    columns = parser.typed_data()
+    for index in range(len(columns)):
+        column = columns[index]
+        if column and isinstance(column[0], numeric):
+            columns[index] = normalize(*column)
+
+    # output
+    parser.write(transpose(columns))
 
 if __name__ == '__main__':
     main()