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From tillrohrmann <...@git.apache.org>
Date Thu, 20 Aug 2015 14:57:45 GMT
Github user tillrohrmann commented on a diff in the pull request:

--- Diff: docs/libs/ml/statistics.md ---
@@ -0,0 +1,69 @@
+---
+mathjax: include
+---
+<!--
+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
+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
+
+
+Unless required by applicable law or agreed to in writing,
+"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
+-->
+
+* This will be replaced by the TOC
+{:toc}
+
+## Description
+
+ The statistics utility provides features such as building histograms over data.
+
+## Methods
+
+ The Statistics utility provides two major functions: createHistogram and
+ createDiscreteHistogram.
+
+### Creating a histogram
+
+ There are two types of histograms:
+   1. **Continuous Histograms**: These histograms are formed on a data set X: DataSet[Double]
+   when the values in X are from a continuous range. These histograms support
+   quantile and sum  operations. Here quantile(q) refers to a value $x_q$ such
that \$|x: x
--- End diff --

I couldn't find sum in ContinuousHistogram. Did you mean count?

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