Github user jingyimei commented on a diff in the pull request:
https://github.com/apache/madlib/pull/241#discussion_r175957056
--- Diff:
src/ports/postgres/modules/utilities/mean_std_dev_calculator.py_in ---
@@ -0,0 +1,54 @@
+# coding=utf-8
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+"""
+@file mean_std_dev_calculator.py_in
+
+@brief
+
+@namespace utilities
+
+"""
+
+from convex.utils_regularization import utils_ind_var_scales
+from utilities import _array_to_string
+
+m4_changequote(`<!', `!>')
+
+#TODO: use this for all the modules that calculate the std dev and mean
for x
+# mlp, pca, elastic_net
--- End diff --
Yes the TODO comment is left here for future reference. The idea is that
whenever we update any of these modules, we can refactor the code to call this
class.
---
