1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
<?xml version="1.0" encoding="ascii"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>pyspark.statcounter</title>
<link rel="stylesheet" href="epydoc.css" type="text/css" />
<script type="text/javascript" src="epydoc.js"></script>
</head>
<body bgcolor="white" text="black" link="blue" vlink="#204080"
alink="#204080">
<!-- ==================== NAVIGATION BAR ==================== -->
<table class="navbar" border="0" width="100%" cellpadding="0"
bgcolor="#a0c0ff" cellspacing="0">
<tr valign="middle">
<!-- Home link -->
<th> <a
href="pyspark-module.html">Home</a> </th>
<!-- Tree link -->
<th> <a
href="module-tree.html">Trees</a> </th>
<!-- Index link -->
<th> <a
href="identifier-index.html">Indices</a> </th>
<!-- Help link -->
<th> <a
href="help.html">Help</a> </th>
<!-- Project homepage -->
<th class="navbar" align="right" width="100%">
<table border="0" cellpadding="0" cellspacing="0">
<tr><th class="navbar" align="center"
><a class="navbar" target="_top" href="http://spark-project.org">PySpark</a></th>
</tr></table></th>
</tr>
</table>
<table width="100%" cellpadding="0" cellspacing="0">
<tr valign="top">
<td width="100%">
<span class="breadcrumbs">
<a href="pyspark-module.html">Package pyspark</a> ::
Module statcounter
</span>
</td>
<td>
<table cellpadding="0" cellspacing="0">
<!-- hide/show private -->
<tr><td align="right"><span class="options"
>[<a href="frames.html" target="_top">frames</a
>] | <a href="pyspark.statcounter-pysrc.html"
target="_top">no frames</a>]</span></td></tr>
</table>
</td>
</tr>
</table>
<h1 class="epydoc">Source Code for <a href="pyspark.statcounter-module.html">Module pyspark.statcounter</a></h1>
<pre class="py-src">
<a name="L1"></a><tt class="py-lineno"> 1</tt> <tt class="py-line"><tt class="py-comment">#</tt> </tt>
<a name="L2"></a><tt class="py-lineno"> 2</tt> <tt class="py-line"><tt class="py-comment"># Licensed to the Apache Software Foundation (ASF) under one or more</tt> </tt>
<a name="L3"></a><tt class="py-lineno"> 3</tt> <tt class="py-line"><tt class="py-comment"># contributor license agreements. See the NOTICE file distributed with</tt> </tt>
<a name="L4"></a><tt class="py-lineno"> 4</tt> <tt class="py-line"><tt class="py-comment"># this work for additional information regarding copyright ownership.</tt> </tt>
<a name="L5"></a><tt class="py-lineno"> 5</tt> <tt class="py-line"><tt class="py-comment"># The ASF licenses this file to You under the Apache License, Version 2.0</tt> </tt>
<a name="L6"></a><tt class="py-lineno"> 6</tt> <tt class="py-line"><tt class="py-comment"># (the "License"); you may not use this file except in compliance with</tt> </tt>
<a name="L7"></a><tt class="py-lineno"> 7</tt> <tt class="py-line"><tt class="py-comment"># the License. You may obtain a copy of the License at</tt> </tt>
<a name="L8"></a><tt class="py-lineno"> 8</tt> <tt class="py-line"><tt class="py-comment">#</tt> </tt>
<a name="L9"></a><tt class="py-lineno"> 9</tt> <tt class="py-line"><tt class="py-comment"># http://www.apache.org/licenses/LICENSE-2.0</tt> </tt>
<a name="L10"></a><tt class="py-lineno"> 10</tt> <tt class="py-line"><tt class="py-comment">#</tt> </tt>
<a name="L11"></a><tt class="py-lineno"> 11</tt> <tt class="py-line"><tt class="py-comment"># Unless required by applicable law or agreed to in writing, software</tt> </tt>
<a name="L12"></a><tt class="py-lineno"> 12</tt> <tt class="py-line"><tt class="py-comment"># distributed under the License is distributed on an "AS IS" BASIS,</tt> </tt>
<a name="L13"></a><tt class="py-lineno"> 13</tt> <tt class="py-line"><tt class="py-comment"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</tt> </tt>
<a name="L14"></a><tt class="py-lineno"> 14</tt> <tt class="py-line"><tt class="py-comment"># See the License for the specific language governing permissions and</tt> </tt>
<a name="L15"></a><tt class="py-lineno"> 15</tt> <tt class="py-line"><tt class="py-comment"># limitations under the License.</tt> </tt>
<a name="L16"></a><tt class="py-lineno"> 16</tt> <tt class="py-line"><tt class="py-comment">#</tt> </tt>
<a name="L17"></a><tt class="py-lineno"> 17</tt> <tt class="py-line"> </tt>
<a name="L18"></a><tt class="py-lineno"> 18</tt> <tt class="py-line"><tt class="py-comment"># This file is ported from spark/util/StatCounter.scala</tt> </tt>
<a name="L19"></a><tt class="py-lineno"> 19</tt> <tt class="py-line"> </tt>
<a name="L20"></a><tt class="py-lineno"> 20</tt> <tt class="py-line"><tt class="py-keyword">import</tt> <tt id="link-0" class="py-name" targets="Method pyspark.statcounter.StatCounter.copy()=pyspark.statcounter.StatCounter-class.html#copy"><a title="pyspark.statcounter.StatCounter.copy" class="py-name" href="#" onclick="return doclink('link-0', 'copy', 'link-0');">copy</a></tt> </tt>
<a name="L21"></a><tt class="py-lineno"> 21</tt> <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">math</tt> </tt>
<a name="L22"></a><tt class="py-lineno"> 22</tt> <tt class="py-line"> </tt>
<a name="StatCounter"></a><div id="StatCounter-def"><a name="L23"></a><tt class="py-lineno"> 23</tt> <a class="py-toggle" href="#" id="StatCounter-toggle" onclick="return toggle('StatCounter');">-</a><tt class="py-line"><tt class="py-keyword">class</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html">StatCounter</a><tt class="py-op">(</tt><tt class="py-base-class">object</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="StatCounter-expanded"><a name="L24"></a><tt class="py-lineno"> 24</tt> <tt class="py-line"> </tt>
<a name="StatCounter.__init__"></a><div id="StatCounter.__init__-def"><a name="L25"></a><tt class="py-lineno"> 25</tt> <a class="py-toggle" href="#" id="StatCounter.__init__-toggle" onclick="return toggle('StatCounter.__init__');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html#__init__">__init__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">values</tt><tt class="py-op">=</tt><tt class="py-op">[</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter.__init__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="StatCounter.__init__-expanded"><a name="L26"></a><tt class="py-lineno"> 26</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">=</tt> <tt class="py-number">0L</tt> <tt class="py-comment"># Running count of our values</tt> </tt>
<a name="L27"></a><tt class="py-lineno"> 27</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> <tt class="py-op">=</tt> <tt class="py-number">0.0</tt> <tt class="py-comment"># Running mean of our values</tt> </tt>
<a name="L28"></a><tt class="py-lineno"> 28</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">m2</tt> <tt class="py-op">=</tt> <tt class="py-number">0.0</tt> <tt class="py-comment"># Running variance numerator (sum of (x - mean)^2)</tt> </tt>
<a name="L29"></a><tt class="py-lineno"> 29</tt> <tt class="py-line"> </tt>
<a name="L30"></a><tt class="py-lineno"> 30</tt> <tt class="py-line"> <tt class="py-keyword">for</tt> <tt class="py-name">v</tt> <tt class="py-keyword">in</tt> <tt class="py-name">values</tt><tt class="py-op">:</tt> </tt>
<a name="L31"></a><tt class="py-lineno"> 31</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-1" class="py-name" targets="Method pyspark.statcounter.StatCounter.merge()=pyspark.statcounter.StatCounter-class.html#merge"><a title="pyspark.statcounter.StatCounter.merge" class="py-name" href="#" onclick="return doclink('link-1', 'merge', 'link-1');">merge</a></tt><tt class="py-op">(</tt><tt class="py-name">v</tt><tt class="py-op">)</tt> </tt>
</div><a name="L32"></a><tt class="py-lineno"> 32</tt> <tt class="py-line"> </tt>
<a name="L33"></a><tt class="py-lineno"> 33</tt> <tt class="py-line"> <tt class="py-comment"># Add a value into this StatCounter, updating the internal statistics.</tt> </tt>
<a name="StatCounter.merge"></a><div id="StatCounter.merge-def"><a name="L34"></a><tt class="py-lineno"> 34</tt> <a class="py-toggle" href="#" id="StatCounter.merge-toggle" onclick="return toggle('StatCounter.merge');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html#merge">merge</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">value</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter.merge-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="StatCounter.merge-expanded"><a name="L35"></a><tt class="py-lineno"> 35</tt> <tt class="py-line"> <tt class="py-name">delta</tt> <tt class="py-op">=</tt> <tt id="link-2" class="py-name" targets="Method pyspark.accumulators.Accumulator.value()=pyspark.accumulators.Accumulator-class.html#value"><a title="pyspark.accumulators.Accumulator.value" class="py-name" href="#" onclick="return doclink('link-2', 'value', 'link-2');">value</a></tt> <tt class="py-op">-</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> </tt>
<a name="L36"></a><tt class="py-lineno"> 36</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">+=</tt> <tt class="py-number">1</tt> </tt>
<a name="L37"></a><tt class="py-lineno"> 37</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> <tt class="py-op">+=</tt> <tt class="py-name">delta</tt> <tt class="py-op">/</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> </tt>
<a name="L38"></a><tt class="py-lineno"> 38</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">m2</tt> <tt class="py-op">+=</tt> <tt class="py-name">delta</tt> <tt class="py-op">*</tt> <tt class="py-op">(</tt><tt id="link-3" class="py-name"><a title="pyspark.accumulators.Accumulator.value" class="py-name" href="#" onclick="return doclink('link-3', 'value', 'link-2');">value</a></tt> <tt class="py-op">-</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt><tt class="py-op">)</tt> </tt>
<a name="L39"></a><tt class="py-lineno"> 39</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">self</tt> </tt>
</div><a name="L40"></a><tt class="py-lineno"> 40</tt> <tt class="py-line"> </tt>
<a name="L41"></a><tt class="py-lineno"> 41</tt> <tt class="py-line"> <tt class="py-comment"># Merge another StatCounter into this one, adding up the internal statistics.</tt> </tt>
<a name="StatCounter.mergeStats"></a><div id="StatCounter.mergeStats-def"><a name="L42"></a><tt class="py-lineno"> 42</tt> <a class="py-toggle" href="#" id="StatCounter.mergeStats-toggle" onclick="return toggle('StatCounter.mergeStats');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html#mergeStats">mergeStats</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">other</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter.mergeStats-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="StatCounter.mergeStats-expanded"><a name="L43"></a><tt class="py-lineno"> 43</tt> <tt class="py-line"> <tt class="py-keyword">if</tt> <tt class="py-keyword">not</tt> <tt class="py-name">isinstance</tt><tt class="py-op">(</tt><tt class="py-name">other</tt><tt class="py-op">,</tt> <tt id="link-4" class="py-name" targets="Class pyspark.statcounter.StatCounter=pyspark.statcounter.StatCounter-class.html"><a title="pyspark.statcounter.StatCounter" class="py-name" href="#" onclick="return doclink('link-4', 'StatCounter', 'link-4');">StatCounter</a></tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L44"></a><tt class="py-lineno"> 44</tt> <tt class="py-line"> <tt class="py-keyword">raise</tt> <tt class="py-name">Exception</tt><tt class="py-op">(</tt><tt class="py-string">"Can only merge Statcounters!"</tt><tt class="py-op">)</tt> </tt>
<a name="L45"></a><tt class="py-lineno"> 45</tt> <tt class="py-line"> </tt>
<a name="L46"></a><tt class="py-lineno"> 46</tt> <tt class="py-line"> <tt class="py-keyword">if</tt> <tt class="py-name">other</tt> <tt class="py-keyword">is</tt> <tt class="py-name">self</tt><tt class="py-op">:</tt> <tt class="py-comment"># reference equality holds</tt> </tt>
<a name="L47"></a><tt class="py-lineno"> 47</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-5" class="py-name"><a title="pyspark.statcounter.StatCounter.merge" class="py-name" href="#" onclick="return doclink('link-5', 'merge', 'link-1');">merge</a></tt><tt class="py-op">(</tt><tt id="link-6" class="py-name"><a title="pyspark.statcounter.StatCounter.copy" class="py-name" href="#" onclick="return doclink('link-6', 'copy', 'link-0');">copy</a></tt><tt class="py-op">.</tt><tt class="py-name">deepcopy</tt><tt class="py-op">(</tt><tt class="py-name">other</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> <tt class="py-comment"># Avoid overwriting fields in a weird order</tt> </tt>
<a name="L48"></a><tt class="py-lineno"> 48</tt> <tt class="py-line"> <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L49"></a><tt class="py-lineno"> 49</tt> <tt class="py-line"> <tt class="py-keyword">if</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">==</tt> <tt class="py-number">0</tt><tt class="py-op">:</tt> </tt>
<a name="L50"></a><tt class="py-lineno"> 50</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> <tt class="py-op">=</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> </tt>
<a name="L51"></a><tt class="py-lineno"> 51</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">m2</tt> <tt class="py-op">=</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">m2</tt> </tt>
<a name="L52"></a><tt class="py-lineno"> 52</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">=</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> </tt>
<a name="L53"></a><tt class="py-lineno"> 53</tt> <tt class="py-line"> <tt class="py-keyword">elif</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">!=</tt> <tt class="py-number">0</tt><tt class="py-op">:</tt> </tt>
<a name="L54"></a><tt class="py-lineno"> 54</tt> <tt class="py-line"> <tt class="py-name">delta</tt> <tt class="py-op">=</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> <tt class="py-op">-</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> </tt>
<a name="L55"></a><tt class="py-lineno"> 55</tt> <tt class="py-line"> <tt class="py-keyword">if</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">*</tt> <tt class="py-number">10</tt> <tt class="py-op"><</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt><tt class="py-op">:</tt> </tt>
<a name="L56"></a><tt class="py-lineno"> 56</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">delta</tt> <tt class="py-op">*</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">n</tt><tt class="py-op">)</tt> <tt class="py-op">/</tt> <tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">+</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">n</tt><tt class="py-op">)</tt> </tt>
<a name="L57"></a><tt class="py-lineno"> 57</tt> <tt class="py-line"> <tt class="py-keyword">elif</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">*</tt> <tt class="py-number">10</tt> <tt class="py-op"><</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">n</tt><tt class="py-op">:</tt> </tt>
<a name="L58"></a><tt class="py-lineno"> 58</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> <tt class="py-op">=</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> <tt class="py-op">-</tt> <tt class="py-op">(</tt><tt class="py-name">delta</tt> <tt class="py-op">*</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt><tt class="py-op">)</tt> <tt class="py-op">/</tt> <tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">+</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">n</tt><tt class="py-op">)</tt> </tt>
<a name="L59"></a><tt class="py-lineno"> 59</tt> <tt class="py-line"> <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L60"></a><tt class="py-lineno"> 60</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> <tt class="py-op">*</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">+</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> <tt class="py-op">*</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">n</tt><tt class="py-op">)</tt> <tt class="py-op">/</tt> <tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">+</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">n</tt><tt class="py-op">)</tt> </tt>
<a name="L61"></a><tt class="py-lineno"> 61</tt> <tt class="py-line"> </tt>
<a name="L62"></a><tt class="py-lineno"> 62</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">m2</tt> <tt class="py-op">+=</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">m2</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-name">delta</tt> <tt class="py-op">*</tt> <tt class="py-name">delta</tt> <tt class="py-op">*</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">*</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">n</tt><tt class="py-op">)</tt> <tt class="py-op">/</tt> <tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">+</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">n</tt><tt class="py-op">)</tt> </tt>
<a name="L63"></a><tt class="py-lineno"> 63</tt> <tt class="py-line"> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">+=</tt> <tt class="py-name">other</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> </tt>
<a name="L64"></a><tt class="py-lineno"> 64</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">self</tt> </tt>
</div><a name="L65"></a><tt class="py-lineno"> 65</tt> <tt class="py-line"> </tt>
<a name="L66"></a><tt class="py-lineno"> 66</tt> <tt class="py-line"> <tt class="py-comment"># Clone this StatCounter</tt> </tt>
<a name="StatCounter.copy"></a><div id="StatCounter.copy-def"><a name="L67"></a><tt class="py-lineno"> 67</tt> <a class="py-toggle" href="#" id="StatCounter.copy-toggle" onclick="return toggle('StatCounter.copy');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html#copy">copy</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter.copy-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="StatCounter.copy-expanded"><a name="L68"></a><tt class="py-lineno"> 68</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt id="link-7" class="py-name"><a title="pyspark.statcounter.StatCounter.copy" class="py-name" href="#" onclick="return doclink('link-7', 'copy', 'link-0');">copy</a></tt><tt class="py-op">.</tt><tt class="py-name">deepcopy</tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">)</tt> </tt>
</div><a name="L69"></a><tt class="py-lineno"> 69</tt> <tt class="py-line"> </tt>
<a name="StatCounter.count"></a><div id="StatCounter.count-def"><a name="L70"></a><tt class="py-lineno"> 70</tt> <a class="py-toggle" href="#" id="StatCounter.count-toggle" onclick="return toggle('StatCounter.count');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html#count">count</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter.count-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="StatCounter.count-expanded"><a name="L71"></a><tt class="py-lineno"> 71</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> </tt>
</div><a name="L72"></a><tt class="py-lineno"> 72</tt> <tt class="py-line"> </tt>
<a name="StatCounter.mean"></a><div id="StatCounter.mean-def"><a name="L73"></a><tt class="py-lineno"> 73</tt> <a class="py-toggle" href="#" id="StatCounter.mean-toggle" onclick="return toggle('StatCounter.mean');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html#mean">mean</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter.mean-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="StatCounter.mean-expanded"><a name="L74"></a><tt class="py-lineno"> 74</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> </tt>
</div><a name="L75"></a><tt class="py-lineno"> 75</tt> <tt class="py-line"> </tt>
<a name="StatCounter.sum"></a><div id="StatCounter.sum-def"><a name="L76"></a><tt class="py-lineno"> 76</tt> <a class="py-toggle" href="#" id="StatCounter.sum-toggle" onclick="return toggle('StatCounter.sum');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html#sum">sum</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter.sum-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="StatCounter.sum-expanded"><a name="L77"></a><tt class="py-lineno"> 77</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">*</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">mu</tt> </tt>
</div><a name="L78"></a><tt class="py-lineno"> 78</tt> <tt class="py-line"> </tt>
<a name="L79"></a><tt class="py-lineno"> 79</tt> <tt class="py-line"> <tt class="py-comment"># Return the variance of the values.</tt> </tt>
<a name="StatCounter.variance"></a><div id="StatCounter.variance-def"><a name="L80"></a><tt class="py-lineno"> 80</tt> <a class="py-toggle" href="#" id="StatCounter.variance-toggle" onclick="return toggle('StatCounter.variance');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html#variance">variance</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter.variance-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="StatCounter.variance-expanded"><a name="L81"></a><tt class="py-lineno"> 81</tt> <tt class="py-line"> <tt class="py-keyword">if</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">==</tt> <tt class="py-number">0</tt><tt class="py-op">:</tt> </tt>
<a name="L82"></a><tt class="py-lineno"> 82</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-string">'nan'</tt><tt class="py-op">)</tt> </tt>
<a name="L83"></a><tt class="py-lineno"> 83</tt> <tt class="py-line"> <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L84"></a><tt class="py-lineno"> 84</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">m2</tt> <tt class="py-op">/</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> </tt>
</div><a name="L85"></a><tt class="py-lineno"> 85</tt> <tt class="py-line"> </tt>
<a name="L86"></a><tt class="py-lineno"> 86</tt> <tt class="py-line"> <tt class="py-comment">#</tt> </tt>
<a name="L87"></a><tt class="py-lineno"> 87</tt> <tt class="py-line"> <tt class="py-comment"># Return the sample variance, which corrects for bias in estimating the variance by dividing</tt> </tt>
<a name="L88"></a><tt class="py-lineno"> 88</tt> <tt class="py-line"> <tt class="py-comment"># by N-1 instead of N.</tt> </tt>
<a name="L89"></a><tt class="py-lineno"> 89</tt> <tt class="py-line"> <tt class="py-comment">#</tt> </tt>
<a name="StatCounter.sampleVariance"></a><div id="StatCounter.sampleVariance-def"><a name="L90"></a><tt class="py-lineno"> 90</tt> <a class="py-toggle" href="#" id="StatCounter.sampleVariance-toggle" onclick="return toggle('StatCounter.sampleVariance');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html#sampleVariance">sampleVariance</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter.sampleVariance-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="StatCounter.sampleVariance-expanded"><a name="L91"></a><tt class="py-lineno"> 91</tt> <tt class="py-line"> <tt class="py-keyword">if</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op"><=</tt> <tt class="py-number">1</tt><tt class="py-op">:</tt> </tt>
<a name="L92"></a><tt class="py-lineno"> 92</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">float</tt><tt class="py-op">(</tt><tt class="py-string">'nan'</tt><tt class="py-op">)</tt> </tt>
<a name="L93"></a><tt class="py-lineno"> 93</tt> <tt class="py-line"> <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L94"></a><tt class="py-lineno"> 94</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">m2</tt> <tt class="py-op">/</tt> <tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">n</tt> <tt class="py-op">-</tt> <tt class="py-number">1</tt><tt class="py-op">)</tt> </tt>
</div><a name="L95"></a><tt class="py-lineno"> 95</tt> <tt class="py-line"> </tt>
<a name="L96"></a><tt class="py-lineno"> 96</tt> <tt class="py-line"> <tt class="py-comment"># Return the standard deviation of the values.</tt> </tt>
<a name="StatCounter.stdev"></a><div id="StatCounter.stdev-def"><a name="L97"></a><tt class="py-lineno"> 97</tt> <a class="py-toggle" href="#" id="StatCounter.stdev-toggle" onclick="return toggle('StatCounter.stdev');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html#stdev">stdev</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter.stdev-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="StatCounter.stdev-expanded"><a name="L98"></a><tt class="py-lineno"> 98</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">math</tt><tt class="py-op">.</tt><tt class="py-name">sqrt</tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-8" class="py-name" targets="Method pyspark.rdd.RDD.variance()=pyspark.rdd.RDD-class.html#variance,Method pyspark.statcounter.StatCounter.variance()=pyspark.statcounter.StatCounter-class.html#variance"><a title="pyspark.rdd.RDD.variance
pyspark.statcounter.StatCounter.variance" class="py-name" href="#" onclick="return doclink('link-8', 'variance', 'link-8');">variance</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
</div><a name="L99"></a><tt class="py-lineno"> 99</tt> <tt class="py-line"> </tt>
<a name="L100"></a><tt class="py-lineno">100</tt> <tt class="py-line"> <tt class="py-comment">#</tt> </tt>
<a name="L101"></a><tt class="py-lineno">101</tt> <tt class="py-line"> <tt class="py-comment"># Return the sample standard deviation of the values, which corrects for bias in estimating the</tt> </tt>
<a name="L102"></a><tt class="py-lineno">102</tt> <tt class="py-line"> <tt class="py-comment"># variance by dividing by N-1 instead of N.</tt> </tt>
<a name="L103"></a><tt class="py-lineno">103</tt> <tt class="py-line"> <tt class="py-comment">#</tt> </tt>
<a name="StatCounter.sampleStdev"></a><div id="StatCounter.sampleStdev-def"><a name="L104"></a><tt class="py-lineno">104</tt> <a class="py-toggle" href="#" id="StatCounter.sampleStdev-toggle" onclick="return toggle('StatCounter.sampleStdev');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html#sampleStdev">sampleStdev</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter.sampleStdev-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="StatCounter.sampleStdev-expanded"><a name="L105"></a><tt class="py-lineno">105</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">math</tt><tt class="py-op">.</tt><tt class="py-name">sqrt</tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-9" class="py-name" targets="Method pyspark.rdd.RDD.sampleVariance()=pyspark.rdd.RDD-class.html#sampleVariance,Method pyspark.statcounter.StatCounter.sampleVariance()=pyspark.statcounter.StatCounter-class.html#sampleVariance"><a title="pyspark.rdd.RDD.sampleVariance
pyspark.statcounter.StatCounter.sampleVariance" class="py-name" href="#" onclick="return doclink('link-9', 'sampleVariance', 'link-9');">sampleVariance</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
</div><a name="L106"></a><tt class="py-lineno">106</tt> <tt class="py-line"> </tt>
<a name="StatCounter.__repr__"></a><div id="StatCounter.__repr__-def"><a name="L107"></a><tt class="py-lineno">107</tt> <a class="py-toggle" href="#" id="StatCounter.__repr__-toggle" onclick="return toggle('StatCounter.__repr__');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pyspark.statcounter.StatCounter-class.html#__repr__">__repr__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="StatCounter.__repr__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="StatCounter.__repr__-expanded"><a name="L108"></a><tt class="py-lineno">108</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-string">"(count: %s, mean: %s, stdev: %s)"</tt> <tt class="py-op">%</tt> <tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-10" class="py-name" targets="Method pyspark.rdd.RDD.count()=pyspark.rdd.RDD-class.html#count,Method pyspark.statcounter.StatCounter.count()=pyspark.statcounter.StatCounter-class.html#count"><a title="pyspark.rdd.RDD.count
pyspark.statcounter.StatCounter.count" class="py-name" href="#" onclick="return doclink('link-10', 'count', 'link-10');">count</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-11" class="py-name" targets="Method pyspark.rdd.RDD.mean()=pyspark.rdd.RDD-class.html#mean,Method pyspark.statcounter.StatCounter.mean()=pyspark.statcounter.StatCounter-class.html#mean"><a title="pyspark.rdd.RDD.mean
pyspark.statcounter.StatCounter.mean" class="py-name" href="#" onclick="return doclink('link-11', 'mean', 'link-11');">mean</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-12" class="py-name" targets="Method pyspark.rdd.RDD.stdev()=pyspark.rdd.RDD-class.html#stdev,Method pyspark.statcounter.StatCounter.stdev()=pyspark.statcounter.StatCounter-class.html#stdev"><a title="pyspark.rdd.RDD.stdev
pyspark.statcounter.StatCounter.stdev" class="py-name" href="#" onclick="return doclink('link-12', 'stdev', 'link-12');">stdev</a></tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
</div></div><a name="L109"></a><tt class="py-lineno">109</tt> <tt class="py-line"> </tt><script type="text/javascript">
<!--
expandto(location.href);
// -->
</script>
</pre>
<br />
<!-- ==================== NAVIGATION BAR ==================== -->
<table class="navbar" border="0" width="100%" cellpadding="0"
bgcolor="#a0c0ff" cellspacing="0">
<tr valign="middle">
<!-- Home link -->
<th> <a
href="pyspark-module.html">Home</a> </th>
<!-- Tree link -->
<th> <a
href="module-tree.html">Trees</a> </th>
<!-- Index link -->
<th> <a
href="identifier-index.html">Indices</a> </th>
<!-- Help link -->
<th> <a
href="help.html">Help</a> </th>
<!-- Project homepage -->
<th class="navbar" align="right" width="100%">
<table border="0" cellpadding="0" cellspacing="0">
<tr><th class="navbar" align="center"
><a class="navbar" target="_top" href="http://spark-project.org">PySpark</a></th>
</tr></table></th>
</tr>
</table>
<table border="0" cellpadding="0" cellspacing="0" width="100%%">
<tr>
<td align="left" class="footer">
Generated by Epydoc 3.0.1 on Sun Feb 2 22:20:29 2014
</td>
<td align="right" class="footer">
<a target="mainFrame" href="http://epydoc.sourceforge.net"
>http://epydoc.sourceforge.net</a>
</td>
</tr>
</table>
<script type="text/javascript">
<!--
// Private objects are initially displayed (because if
// javascript is turned off then we want them to be
// visible); but by default, we want to hide them. So hide
// them unless we have a cookie that says to show them.
checkCookie();
// -->
</script>
</body>
</html>
|
