http://git-wip-us.apache.org/repos/asf/incubator-hivemall-site/blob/eb070238/userguide/binaryclass/titanic_rf.html
----------------------------------------------------------------------
diff --git a/userguide/binaryclass/titanic_rf.html 
b/userguide/binaryclass/titanic_rf.html
index b76030d..74d2d5a 100644
--- a/userguide/binaryclass/titanic_rf.html
+++ b/userguide/binaryclass/titanic_rf.html
@@ -980,6 +980,21 @@
             
         </li>
     
+        <li class="chapter " data-level="6.3.5" data-path="news20_rf.html">
+            
+                <a href="news20_rf.html">
+            
+                    
+                        <b>6.3.5.</b>
+                    
+                    Random Forest
+            
+                </a>
+            
+
+            
+        </li>
+    
 
             </ul>
             
@@ -1324,7 +1339,7 @@
                     
                         <b>7.2.3.</b>
                     
-                    RandomForest
+                    Random Forest
             
                 </a>
             
@@ -2122,58 +2137,59 @@ The example gives a baseline score without any feature 
engineering.</p>
 <li><a href="#training">Training</a></li>
 <li><a href="#prediction">Prediction</a></li>
 <li><a href="#kaggle-submission">Kaggle submission</a></li>
+<li><a href="#graphvis-export">Graphvis export</a></li>
 <li><a href="#test-by-dividing-training-dataset">Test by dividing training 
dataset</a></li>
 </ul>
 
 </div><!-- tocstop -->
 <h1 id="data-preparation">Data preparation</h1>
-<pre><code class="lang-sql">create database titanic;
-use titanic;
-
-drop table train;
-create external table train (
-  passengerid int, -- unique id
-  survived int, -- target label
-  pclass int,
-  name string,
-  sex string,
-  age int,
-  sibsp int, -- Number of Siblings/Spouses Aboard
-  parch int, -- Number of Parents/Children Aboard
-  ticket string,
-  fare double,
-  cabin string,
-  embarked string
+<pre><code class="lang-sql"><span class="hljs-keyword">create</span> <span 
class="hljs-keyword">database</span> titanic;
+<span class="hljs-keyword">use</span> titanic;
+
+<span class="hljs-keyword">drop</span> <span class="hljs-keyword">table</span> 
train;
+<span class="hljs-keyword">create</span> <span 
class="hljs-keyword">external</span> <span class="hljs-keyword">table</span> 
train (
+  passengerid <span class="hljs-built_in">int</span>, <span 
class="hljs-comment">-- unique id</span>
+  survived <span class="hljs-built_in">int</span>, <span 
class="hljs-comment">-- target label</span>
+  pclass <span class="hljs-built_in">int</span>,
+  <span class="hljs-keyword">name</span> <span 
class="hljs-keyword">string</span>,
+  sex <span class="hljs-keyword">string</span>,
+  age <span class="hljs-built_in">int</span>,
+  sibsp <span class="hljs-built_in">int</span>, <span class="hljs-comment">-- 
Number of Siblings/Spouses Aboard</span>
+  parch <span class="hljs-built_in">int</span>, <span class="hljs-comment">-- 
Number of Parents/Children Aboard</span>
+  ticket <span class="hljs-keyword">string</span>,
+  fare <span class="hljs-keyword">double</span>,
+  cabin <span class="hljs-keyword">string</span>,
+  embarked <span class="hljs-keyword">string</span>
 ) 
-ROW FORMAT DELIMITED
-   FIELDS TERMINATED BY &apos;|&apos;
-   LINES TERMINATED BY &apos;\n&apos;
-STORED AS TEXTFILE LOCATION &apos;/dataset/titanic/train&apos;;
-
-hadoop fs -rm /dataset/titanic/train/train.csv
-awk &apos;{ 
FPAT=&quot;([^,]*)|(\&quot;[^\&quot;]+\&quot;)&quot;;OFS=&quot;|&quot;; } NR 
&gt;1 {$1=$1;$4=substr($4,2,length($4)-2);print $0}&apos; train.csv | hadoop fs 
-put - /dataset/titanic/train/train.csv
-
-drop table test_raw;
-create external table test_raw (
-  passengerid int,
-  pclass int,
-  name string,
-  sex string,
-  age int,
-  sibsp int, -- Number of Siblings/Spouses Aboard
-  parch int, -- Number of Parents/Children Aboard
-  ticket string,
-  fare double,
-  cabin string,
-  embarked string
+<span class="hljs-keyword">ROW</span> <span class="hljs-keyword">FORMAT</span> 
<span class="hljs-keyword">DELIMITED</span>
+   <span class="hljs-keyword">FIELDS</span> <span 
class="hljs-keyword">TERMINATED</span> <span class="hljs-keyword">BY</span> 
<span class="hljs-string">&apos;|&apos;</span>
+   <span class="hljs-keyword">LINES</span> <span 
class="hljs-keyword">TERMINATED</span> <span class="hljs-keyword">BY</span> 
<span class="hljs-string">&apos;\n&apos;</span>
+<span class="hljs-keyword">STORED</span> <span class="hljs-keyword">AS</span> 
TEXTFILE LOCATION <span 
class="hljs-string">&apos;/dataset/titanic/train&apos;</span>;
+</code></pre>
+<pre><code class="lang-sh">hadoop fs -rm /dataset/titanic/train/train.csv
+awk <span class="hljs-string">&apos;{ 
FPAT=&quot;([^,]*)|(\&quot;[^\&quot;]+\&quot;)&quot;;OFS=&quot;|&quot;; } NR 
&gt;1 {$1=$1;$4=substr($4,2,length($4)-2);print $0}&apos;</span> train.csv | 
hadoop fs -put - /dataset/titanic/train/train.csv
+</code></pre>
+<pre><code class="lang-sql"><span class="hljs-keyword">drop</span> <span 
class="hljs-keyword">table</span> test_raw;
+<span class="hljs-keyword">create</span> <span 
class="hljs-keyword">external</span> <span class="hljs-keyword">table</span> 
test_raw (
+  passengerid <span class="hljs-built_in">int</span>,
+  pclass <span class="hljs-built_in">int</span>,
+  <span class="hljs-keyword">name</span> <span 
class="hljs-keyword">string</span>,
+  sex <span class="hljs-keyword">string</span>,
+  age <span class="hljs-built_in">int</span>,
+  sibsp <span class="hljs-built_in">int</span>, <span class="hljs-comment">-- 
Number of Siblings/Spouses Aboard</span>
+  parch <span class="hljs-built_in">int</span>, <span class="hljs-comment">-- 
Number of Parents/Children Aboard</span>
+  ticket <span class="hljs-keyword">string</span>,
+  fare <span class="hljs-keyword">double</span>,
+  cabin <span class="hljs-keyword">string</span>,
+  embarked <span class="hljs-keyword">string</span>
 )
-ROW FORMAT DELIMITED
-   FIELDS TERMINATED BY &apos;|&apos;
-   LINES TERMINATED BY &apos;\n&apos;
-STORED AS TEXTFILE LOCATION &apos;/dataset/titanic/test_raw&apos;;
-
-hadoop fs -rm /dataset/titanic/test_raw/test.csv
-awk &apos;{ 
FPAT=&quot;([^,]*)|(\&quot;[^\&quot;]+\&quot;)&quot;;OFS=&quot;|&quot;; } NR 
&gt;1 {$1=$1;$3=substr($3,2,length($3)-2);print $0}&apos; test.csv | hadoop fs 
-put - /dataset/titanic/test_raw/test.csv
+<span class="hljs-keyword">ROW</span> <span class="hljs-keyword">FORMAT</span> 
<span class="hljs-keyword">DELIMITED</span>
+   <span class="hljs-keyword">FIELDS</span> <span 
class="hljs-keyword">TERMINATED</span> <span class="hljs-keyword">BY</span> 
<span class="hljs-string">&apos;|&apos;</span>
+   <span class="hljs-keyword">LINES</span> <span 
class="hljs-keyword">TERMINATED</span> <span class="hljs-keyword">BY</span> 
<span class="hljs-string">&apos;\n&apos;</span>
+<span class="hljs-keyword">STORED</span> <span class="hljs-keyword">AS</span> 
TEXTFILE LOCATION <span 
class="hljs-string">&apos;/dataset/titanic/test_raw&apos;</span>;
+</code></pre>
+<pre><code class="lang-sh">hadoop fs -rm /dataset/titanic/<span 
class="hljs-built_in">test</span>_raw/test.csv
+awk <span class="hljs-string">&apos;{ 
FPAT=&quot;([^,]*)|(\&quot;[^\&quot;]+\&quot;)&quot;;OFS=&quot;|&quot;; } NR 
&gt;1 {$1=$1;$3=substr($3,2,length($3)-2);print $0}&apos;</span> test.csv | 
hadoop fs -put - /dataset/titanic/<span 
class="hljs-built_in">test</span>_raw/test.csv
 </code></pre>
 <h2 id="data-preparation-for-randomforest">Data preparation for 
RandomForest</h2>
 <pre><code class="lang-sql"><span class="hljs-keyword">set</span> 
hivevar:output_row=<span class="hljs-literal">true</span>;
@@ -2240,26 +2256,27 @@ awk &apos;{ 
FPAT=&quot;([^,]*)|(\&quot;[^\&quot;]+\&quot;)&quot;;OFS=&quot;|&quo
 <p><code>Q</code> and <code>C</code> represent quantitative variable and 
categorical variables, respectively.</p>
 <p><em>Caution:</em> Note that the output of 
<code>guess_attribute_types</code> is not perfect. Revise it by your self.
 For example, <code>pclass</code> is a categorical variable.</p>
-<pre><code class="lang-sql">set hivevar:attrs=C,C,C,Q,Q,Q,C,Q,C,C;
-
-drop table model_rf;
-create table model_rf
-AS
-select
-  train_randomforest_classifier(features, survived, &quot;-trees 500 -attrs 
${attrs}&quot;) 
-    -- as (model_id, model_type, pred_model, var_importance, oob_errors, 
oob_tests)
-from
+<pre><code class="lang-sql"><span class="hljs-keyword">set</span> 
hivevar:attrs=C,C,C,Q,Q,Q,C,Q,C,C;
+
+<span class="hljs-keyword">drop</span> <span class="hljs-keyword">table</span> 
model_rf;
+<span class="hljs-keyword">create</span> <span 
class="hljs-keyword">table</span> model_rf
+<span class="hljs-keyword">AS</span>
+<span class="hljs-keyword">select</span>
+  train_randomforest_classifier(features, survived, <span 
class="hljs-string">&quot;-trees 500 -attrs ${attrs}&quot;</span>) 
+    <span class="hljs-comment">-- as (model_id, model_type, pred_model, 
var_importance, oob_errors, oob_tests)</span>
+<span class="hljs-keyword">from</span>
   train_rf
 ;
 
-select
-  array_sum(var_importance) as var_importance,
-  sum(oob_errors) / sum(oob_tests) as oob_err_rate
-from
+<span class="hljs-keyword">select</span>
+  array_sum(var_importance) <span class="hljs-keyword">as</span> 
var_importance,
+  <span class="hljs-keyword">sum</span>(oob_errors) / <span 
class="hljs-keyword">sum</span>(oob_tests) <span class="hljs-keyword">as</span> 
oob_err_rate
+<span class="hljs-keyword">from</span>
   model_rf;
-
-&gt; 
[137.00242639169272,1194.2140119834373,328.78017188176966,628.2568660509628,200.31275032394072,160.12876797647078,1083.5987543408116,664.1234312561456,422.89449844090393,130.72019667694784]
     0.18742985409652077
 </code></pre>
+<blockquote>
+<p>[137.00242639169272,1194.2140119834373,328.78017188176966,628.2568660509628,200.31275032394072,160.12876797647078,1083.5987543408116,664.1234312561456,422.89449844090393,130.72019667694784]
     0.18742985409652077</p>
+</blockquote>
 <h1 id="prediction">Prediction</h1>
 <pre><code class="lang-sql"><span class="hljs-keyword">SET</span> 
hivevar:classification=<span class="hljs-literal">true</span>;
 <span class="hljs-keyword">set</span> hive.<span 
class="hljs-keyword">auto</span>.<span 
class="hljs-keyword">convert</span>.<span 
class="hljs-keyword">join</span>=<span class="hljs-literal">true</span>;
@@ -2277,16 +2294,27 @@ from
 <span class="hljs-keyword">FROM</span> (
   <span class="hljs-keyword">SELECT</span>
     passengerid,
-    rf_ensemble(predicted) <span class="hljs-keyword">as</span> predicted
+    <span class="hljs-comment">-- rf_ensemble(predicted) as predicted</span>
+    <span class="hljs-comment">-- hivemall v0.5-rc.1 or later</span>
+    rf_ensemble(predicted.<span class="hljs-keyword">value</span>, 
predicted.posteriori, model_weight) <span class="hljs-keyword">as</span> 
predicted
+    <span class="hljs-comment">-- rf_ensemble(predicted.value, 
predicted.posteriori) as predicted -- avoid OOB accuracy (i.e., 
model_weight)</span>
   <span class="hljs-keyword">FROM</span> (
     <span class="hljs-keyword">SELECT</span>
       t.passengerid, 
       <span class="hljs-comment">-- hivemall v0.4.1-alpha.2 or before</span>
       <span class="hljs-comment">-- tree_predict(p.model, t.features, 
${classification}) as predicted</span>
-&#x3000;&#x3000;   <span class="hljs-comment">-- hivemall v0.4.1-alpha.3 or 
later</span>
-      tree_predict(p.model_id, p.model_type, p.pred_model, t.features, 
${classification}) <span class="hljs-keyword">as</span> predicted
+      <span class="hljs-comment">-- hivemall v0.4.1-alpha.3 or later</span>
+      <span class="hljs-comment">-- tree_predict(p.model_id, p.model_type, 
p.pred_model, t.features, ${classification}) as predicted</span>
+      <span class="hljs-comment">-- hivemall v0.5-rc.1 or later</span>
+      p.model_weight,
+      tree_predict(p.model_id, p.<span class="hljs-keyword">model</span>, 
t.features, ${classification}) <span class="hljs-keyword">as</span> predicted
     <span class="hljs-keyword">FROM</span> (
-      <span class="hljs-keyword">SELECT</span> model_id, model_type, 
pred_model <span class="hljs-keyword">FROM</span> model_rf 
+      <span class="hljs-keyword">SELECT</span> 
+        <span class="hljs-comment">-- model_id, pred_model</span>
+        <span class="hljs-comment">-- hivemall v0.5-rc.1 or later</span>
+        model_id, model_weight, <span class="hljs-keyword">model</span>
+      <span class="hljs-keyword">FROM</span> 
+        model_rf 
       <span class="hljs-keyword">DISTRIBUTE</span> <span 
class="hljs-keyword">BY</span> <span class="hljs-keyword">rand</span>(<span 
class="hljs-number">1</span>)
     ) p
     <span class="hljs-keyword">LEFT</span> <span 
class="hljs-keyword">OUTER</span> <span class="hljs-keyword">JOIN</span> 
test_rf t
@@ -2309,94 +2337,137 @@ from
 <span class="hljs-keyword">ORDER</span> <span class="hljs-keyword">BY</span> 
passengerid <span class="hljs-keyword">ASC</span>;
 </code></pre>
 <pre><code class="lang-sh">hadoop fs -getmerge 
/user/hive/warehouse/titanic.db/predicted_rf_submit predicted_rf_submit.csv
-
 sed -i <span class="hljs-_">-e</span> <span class="hljs-string">&quot;1i 
PassengerId,Survived&quot;</span> predicted_rf_submit.csv
 </code></pre>
 <p>Accuracy would gives <code>0.76555</code> for a Kaggle submission.</p>
+<h1 id="graphvis-export">Graphvis export</h1>
+<div class="panel panel-primary"><div class="panel-heading"><h3 
class="panel-title" id="note"><i class="fa fa-edit"></i> Note</h3></div><div 
class="panel-body"><p><code>tree_export</code> feature is supported from 
Hivemall v0.5-rc.1 or later.
+Better to limit tree depth on training by <code>-depth</code> option to plot a 
Decision Tree.</p></div></div>
+<p>Hivemall provide <code>tree_export</code> to export a decision tree into <a 
href="http://www.graphviz.org/"; target="_blank">Graphviz</a> or human-readable 
Javascript format. You can find the usage by issuing the following query:</p>
+<pre><code>&gt; select tree_export(&quot;&quot;,&quot;-help&quot;);
+
+usage: tree_export(string model, const string options, optional
+       array&lt;string&gt; featureNames=null, optional array&lt;string&gt;
+       classNames=null) - exports a Decision Tree model as javascript/dot]
+       [-help] [-output_name &lt;arg&gt;] [-r] [-t &lt;arg&gt;]
+ -help                             Show function help
+ -output_name,--outputName &lt;arg&gt;   output name [default: predicted]
+ -r,--regression                   Is regression tree or not
+ -t,--type &lt;arg&gt;                   Type of output [default: js,
+                                   javascript/js, graphvis/dot
+</code></pre><pre><code class="lang-sql"><span 
class="hljs-keyword">CREATE</span> <span class="hljs-keyword">TABLE</span> 
model_exported 
+  <span class="hljs-keyword">STORED</span> <span 
class="hljs-keyword">AS</span> ORC tblproperties(<span 
class="hljs-string">&quot;orc.compress&quot;</span>=<span 
class="hljs-string">&quot;SNAPPY&quot;</span>)
+<span class="hljs-keyword">AS</span>
+<span class="hljs-keyword">select</span>
+  model_id,
+  tree_export(<span class="hljs-keyword">model</span>, <span 
class="hljs-string">&quot;-type javascript -output_name survived&quot;</span>, 
<span class="hljs-built_in">array</span>(<span 
class="hljs-string">&apos;pclass&apos;</span>,<span 
class="hljs-string">&apos;name&apos;</span>,<span 
class="hljs-string">&apos;sex&apos;</span>,<span 
class="hljs-string">&apos;age&apos;</span>,<span 
class="hljs-string">&apos;sibsp&apos;</span>,<span 
class="hljs-string">&apos;parch&apos;</span>,<span 
class="hljs-string">&apos;ticket&apos;</span>,<span 
class="hljs-string">&apos;fare&apos;</span>,<span 
class="hljs-string">&apos;cabin&apos;</span>,<span 
class="hljs-string">&apos;embarked&apos;</span>), <span 
class="hljs-built_in">array</span>(<span 
class="hljs-string">&apos;no&apos;</span>,<span 
class="hljs-string">&apos;yes&apos;</span>)) <span 
class="hljs-keyword">as</span> js,
+  tree_export(<span class="hljs-keyword">model</span>, <span 
class="hljs-string">&quot;-type graphvis -output_name survived&quot;</span>, 
<span class="hljs-built_in">array</span>(<span 
class="hljs-string">&apos;pclass&apos;</span>,<span 
class="hljs-string">&apos;name&apos;</span>,<span 
class="hljs-string">&apos;sex&apos;</span>,<span 
class="hljs-string">&apos;age&apos;</span>,<span 
class="hljs-string">&apos;sibsp&apos;</span>,<span 
class="hljs-string">&apos;parch&apos;</span>,<span 
class="hljs-string">&apos;ticket&apos;</span>,<span 
class="hljs-string">&apos;fare&apos;</span>,<span 
class="hljs-string">&apos;cabin&apos;</span>,<span 
class="hljs-string">&apos;embarked&apos;</span>), <span 
class="hljs-built_in">array</span>(<span 
class="hljs-string">&apos;no&apos;</span>,<span 
class="hljs-string">&apos;yes&apos;</span>)) <span 
class="hljs-keyword">as</span> dot
+<span class="hljs-keyword">from</span>
+  model_rf
+<span class="hljs-comment">-- limit 1</span>
+;
+</code></pre>
+<p><a 
href="https://gist.github.com/myui/a83ba3795bad9b278cf8bcc59f946e2c#file-titanic-dot";
 target="_blank">Here is an example</a> plotting a decision tree using Graphvis 
or <a href="http://viz-js.com/"; target="_blank">Vis.js</a>.</p>
 <hr>
 <h1 id="test-by-dividing-training-dataset">Test by dividing training 
dataset</h1>
-<pre><code class="lang-sql">drop table train_rf_07;
-create table train_rf_07 
-as
-select * from train_rf 
-where rnd &lt; 0.7;
-
-drop table test_rf_03;
-create table test_rf_03
-as
-select * from train_rf
-where rnd &gt;= 0.7;
-
-drop table model_rf_07;
-create table model_rf_07
-AS
-select
-  train_randomforest_classifier(features, survived, &quot;-trees 500 -attrs 
${attrs}&quot;) 
-from
+<pre><code class="lang-sql"><span class="hljs-keyword">drop</span> <span 
class="hljs-keyword">table</span> train_rf_07;
+<span class="hljs-keyword">create</span> <span 
class="hljs-keyword">table</span> train_rf_07 
+<span class="hljs-keyword">as</span>
+<span class="hljs-keyword">select</span> * <span 
class="hljs-keyword">from</span> train_rf 
+<span class="hljs-keyword">where</span> rnd &lt; <span 
class="hljs-number">0.7</span>;
+
+<span class="hljs-keyword">drop</span> <span class="hljs-keyword">table</span> 
test_rf_03;
+<span class="hljs-keyword">create</span> <span 
class="hljs-keyword">table</span> test_rf_03
+<span class="hljs-keyword">as</span>
+<span class="hljs-keyword">select</span> * <span 
class="hljs-keyword">from</span> train_rf
+<span class="hljs-keyword">where</span> rnd &gt;= <span 
class="hljs-number">0.7</span>;
+
+<span class="hljs-keyword">drop</span> <span class="hljs-keyword">table</span> 
model_rf_07;
+<span class="hljs-keyword">create</span> <span 
class="hljs-keyword">table</span> model_rf_07
+<span class="hljs-keyword">AS</span>
+<span class="hljs-keyword">select</span>
+  train_randomforest_classifier(features, survived, <span 
class="hljs-string">&quot;-trees 500 -attrs ${attrs}&quot;</span>) 
+<span class="hljs-keyword">from</span>
   train_rf_07;
 
-select
-  array_sum(var_importance) as var_importance,
-  sum(oob_errors) / sum(oob_tests) as oob_err_rate
-from
+<span class="hljs-keyword">select</span>
+  array_sum(var_importance) <span class="hljs-keyword">as</span> 
var_importance,
+  <span class="hljs-keyword">sum</span>(oob_errors) / <span 
class="hljs-keyword">sum</span>(oob_tests) <span class="hljs-keyword">as</span> 
oob_err_rate
+<span class="hljs-keyword">from</span>
   model_rf_07;
-&gt; 
[116.12055542977338,960.8569891444097,291.08765260103837,469.74671636586226,163.721292772701,120.784769882858,847.9769298113661,554.4617571355476,346.3500941757221,97.42593940113392]
    0.1838351822503962
-
-SET hivevar:classification=true;
-SET hive.mapjoin.optimized.hashtable=false;
-SET mapred.reduce.tasks=16;
+</code></pre>
+<blockquote>
+<p>[116.12055542977338,960.8569891444097,291.08765260103837,469.74671636586226,163.721292772701,120.784769882858,847.9769298113661,554.4617571355476,346.3500941757221,97.42593940113392]
    0.1838351822503962</p>
+</blockquote>
+<pre><code class="lang-sql"><span class="hljs-keyword">SET</span> 
hivevar:classification=<span class="hljs-literal">true</span>;
+<span class="hljs-keyword">SET</span> hive.mapjoin.optimized.hashtable=<span 
class="hljs-literal">false</span>;
+<span class="hljs-keyword">SET</span> mapred.reduce.tasks=<span 
class="hljs-number">16</span>;
 
-drop table predicted_rf_03;
-create table predicted_rf_03
-as
-SELECT 
+<span class="hljs-keyword">drop</span> <span class="hljs-keyword">table</span> 
predicted_rf_03;
+<span class="hljs-keyword">create</span> <span 
class="hljs-keyword">table</span> predicted_rf_03
+<span class="hljs-keyword">as</span>
+<span class="hljs-keyword">SELECT</span> 
   passengerid,
   predicted.label,
   predicted.probability,
   predicted.probabilities
-FROM (
-  SELECT
+<span class="hljs-keyword">FROM</span> (
+  <span class="hljs-keyword">SELECT</span>
     passengerid,
-    rf_ensemble(predicted) as predicted
-  FROM (
-    SELECT
+    <span class="hljs-comment">-- rf_ensemble(predicted) as predicted</span>
+    <span class="hljs-comment">-- hivemall v0.5-rc.1 or later</span>
+    rf_ensemble(predicted.<span class="hljs-keyword">value</span>, 
predicted.posteriori, model_weight) <span class="hljs-keyword">as</span> 
predicted
+    <span class="hljs-comment">-- rf_ensemble(predicted.value, 
predicted.posteriori) as predicted -- avoid OOB accuracy (i.e., 
model_weight)</span>
+  <span class="hljs-keyword">FROM</span> (
+    <span class="hljs-keyword">SELECT</span>
       t.passengerid, 
-      -- hivemall v0.4.1-alpha.2 or before
-      -- tree_predict(p.model, t.features, ${classification}) as predicted
-      -- hivemall v0.4.1-alpha.3 or later
-      tree_predict(p.model_id, p.model_type, p.pred_model, t.features, 
${classification}) as predicted
-    FROM (
-      SELECT model_id, model_type, pred_model FROM model_rf_07
-      DISTRIBUTE BY rand(1)
+      <span class="hljs-comment">-- hivemall v0.4.1-alpha.2 or before</span>
+      <span class="hljs-comment">-- tree_predict(p.model, t.features, 
${classification}) as predicted</span>
+      <span class="hljs-comment">-- hivemall v0.4.1-alpha.3 or later</span>
+      <span class="hljs-comment">-- tree_predict(p.model_id, p.model_type, 
p.pred_model, t.features, ${classification}) as predicted</span>
+      <span class="hljs-comment">-- hivemall v0.5-rc.1 or later</span>
+      p.model_weight,
+      tree_predict(p.model_id, p.<span class="hljs-keyword">model</span>, 
t.features, ${classification}) <span class="hljs-keyword">as</span> predicted
+    <span class="hljs-keyword">FROM</span> (
+      <span class="hljs-keyword">SELECT</span> 
+        <span class="hljs-comment">-- model_id, model_type, pred_model</span>
+        <span class="hljs-comment">-- hivemall v0.5-rc.1 or later</span>
+        model_id, model_weight, <span class="hljs-keyword">model</span>
+      <span class="hljs-keyword">FROM</span> 
+        model_rf_07
+      <span class="hljs-keyword">DISTRIBUTE</span> <span 
class="hljs-keyword">BY</span> <span class="hljs-keyword">rand</span>(<span 
class="hljs-number">1</span>)
     ) p
-    LEFT OUTER JOIN test_rf_03 t
+    <span class="hljs-keyword">LEFT</span> <span 
class="hljs-keyword">OUTER</span> <span class="hljs-keyword">JOIN</span> 
test_rf_03 t
   ) t1
-  group by
+  <span class="hljs-keyword">group</span> <span class="hljs-keyword">by</span>
     passengerid
 ) t2
 ;
 
-create or replace view rf_submit_03 as
-select 
-  t.survived as actual, 
-  p.label as predicted,
+<span class="hljs-keyword">create</span> <span class="hljs-keyword">or</span> 
<span class="hljs-keyword">replace</span> <span 
class="hljs-keyword">view</span> rf_submit_03 <span 
class="hljs-keyword">as</span>
+<span class="hljs-keyword">select</span> 
+  t.survived <span class="hljs-keyword">as</span> actual, 
+  p.label <span class="hljs-keyword">as</span> predicted,
   p.probabilities
-from 
+<span class="hljs-keyword">from</span> 
   test_rf_03 t 
-  JOIN predicted_rf_03 p on (t.passengerid = p.passengerid)
+  <span class="hljs-keyword">JOIN</span> predicted_rf_03 p <span 
class="hljs-keyword">on</span> (t.passengerid = p.passengerid)
 ;
 
-select count(1) from test_rf_03;
-&gt; 260
-
-set hivevar:testcnt=260;
-
-select count(1)/${testcnt} as accuracy 
-from rf_submit_03 
-where actual = predicted;
+<span class="hljs-keyword">select</span> <span 
class="hljs-keyword">count</span>(<span class="hljs-number">1</span>) <span 
class="hljs-keyword">from</span> test_rf_03;
+</code></pre>
+<blockquote>
+<p>260</p>
+</blockquote>
+<pre><code class="lang-sql"><span class="hljs-keyword">set</span> 
hivevar:testcnt=<span class="hljs-number">260</span>;
 
-&gt; 0.8
+<span class="hljs-keyword">select</span> <span 
class="hljs-keyword">count</span>(<span 
class="hljs-number">1</span>)/${testcnt} <span class="hljs-keyword">as</span> 
accuracy 
+<span class="hljs-keyword">from</span> rf_submit_03 
+<span class="hljs-keyword">where</span> actual = predicted;
 </code></pre>
+<blockquote>
+<p>0.8153846153846154</p>
+</blockquote>
 <p><div id="page-footer" class="localized-footer"><hr><!--
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http://git-wip-us.apache.org/repos/asf/incubator-hivemall-site/blob/eb070238/userguide/binaryclass/webspam.html
----------------------------------------------------------------------
diff --git a/userguide/binaryclass/webspam.html 
b/userguide/binaryclass/webspam.html
index a3e81d6..98dc86e 100644
--- a/userguide/binaryclass/webspam.html
+++ b/userguide/binaryclass/webspam.html
@@ -980,6 +980,21 @@
             
         </li>
     
+        <li class="chapter " data-level="6.3.5" data-path="news20_rf.html">
+            
+                <a href="news20_rf.html">
+            
+                    
+                        <b>6.3.5.</b>
+                    
+                    Random Forest
+            
+                </a>
+            
+
+            
+        </li>
+    
 
             </ul>
             
@@ -1324,7 +1339,7 @@
                     
                         <b>7.2.3.</b>
                     
-                    RandomForest
+                    Random Forest
             
                 </a>
             
@@ -2165,7 +2180,7 @@ Apache Hivemall is an effort undergoing incubation at The 
Apache Software Founda
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http://git-wip-us.apache.org/repos/asf/incubator-hivemall-site/blob/eb070238/userguide/binaryclass/webspam_dataset.html
----------------------------------------------------------------------
diff --git a/userguide/binaryclass/webspam_dataset.html 
b/userguide/binaryclass/webspam_dataset.html
index 6394815..43e59a8 100644
--- a/userguide/binaryclass/webspam_dataset.html
+++ b/userguide/binaryclass/webspam_dataset.html
@@ -980,6 +980,21 @@
             
         </li>
     
+        <li class="chapter " data-level="6.3.5" data-path="news20_rf.html">
+            
+                <a href="news20_rf.html">
+            
+                    
+                        <b>6.3.5.</b>
+                    
+                    Random Forest
+            
+                </a>
+            
+
+            
+        </li>
+    
 
             </ul>
             
@@ -1324,7 +1339,7 @@
                     
                         <b>7.2.3.</b>
                     
-                    RandomForest
+                    Random Forest
             
                 </a>
             
@@ -2235,7 +2250,7 @@ Apache Hivemall is an effort undergoing incubation at The 
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