Google Git
Sign in
apache / iotdb-website / 1bff7db932e39bed7d3c9683ff081196d2445bbe / . / assets / Machine-Learning.html-87ea1fac.js
blob: 797e2b0a3e78ee50fdd04aad5bf9ba0a722b4ca2 [file] [log] [blame]
import{_ as e,o as n,c as s,a as i,f as a}from"./app-601a6ddd.js";const t={},r=a(`<h1 id="machine-learning" tabindex="-1"><a class="header-anchor" href="#machine-learning" aria-hidden="true">#</a> Machine Learning</h1><h2 id="ar" tabindex="-1"><a class="header-anchor" href="#ar" aria-hidden="true">#</a> AR</h2><h3 id="usage" tabindex="-1"><a class="header-anchor" href="#usage" aria-hidden="true">#</a> Usage</h3><p>This function is used to learn the coefficients of the autoregressive models for a time series.</p><p><strong>Name:</strong> AR</p><p><strong>Input Series:</strong> Only support a single input numeric series. The type is INT32 / INT64 / FLOAT / DOUBLE.</p><p><strong>Parameters:</strong></p><ul><li><code>p</code>: The order of the autoregressive model. Its default value is 1.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is DOUBLE. The first line corresponds to the first order coefficient, and so on.</p><p><strong>Note:</strong></p><ul><li>Parameter <code>p</code> should be a positive integer.</li><li>Most points in the series should be sampled at a constant time interval.</li><li>Linear interpolation is applied for the missing points in the series.</li></ul><h3 id="examples" tabindex="-1"><a class="header-anchor" href="#examples" aria-hidden="true">#</a> Examples</h3><h4 id="assigning-model-order" tabindex="-1"><a class="header-anchor" href="#assigning-model-order" aria-hidden="true">#</a> Assigning Model Order</h4><p>Input Series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+---------------+
| Time|root.test.d0.s0|
+-----------------------------+---------------+
|2020-01-01T00:00:01.000+08:00| -4.0|
|2020-01-01T00:00:02.000+08:00| -3.0|
|2020-01-01T00:00:03.000+08:00| -2.0|
|2020-01-01T00:00:04.000+08:00| -1.0|
|2020-01-01T00:00:05.000+08:00| 0.0|
|2020-01-01T00:00:06.000+08:00| 1.0|
|2020-01-01T00:00:07.000+08:00| 2.0|
|2020-01-01T00:00:08.000+08:00| 3.0|
|2020-01-01T00:00:09.000+08:00| 4.0|
+-----------------------------+---------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> ar<span class="token punctuation">(</span>s0<span class="token punctuation">,</span><span class="token string">&quot;p&quot;</span><span class="token operator">=</span><span class="token string">&quot;2&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d0
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output Series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+---------------------------+
| Time|ar(root.test.d0.s0,&quot;p&quot;=&quot;2&quot;)|
+-----------------------------+---------------------------+
|1970-01-01T08:00:00.001+08:00| 0.9429|
|1970-01-01T08:00:00.002+08:00| -0.2571|
+-----------------------------+---------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="representation" tabindex="-1"><a class="header-anchor" href="#representation" aria-hidden="true">#</a> Representation</h2><h3 id="usage-1" tabindex="-1"><a class="header-anchor" href="#usage-1" aria-hidden="true">#</a> Usage</h3><p>This function is used to represent a time series.</p><p><strong>Name:</strong> Representation</p><p><strong>Input Series:</strong> Only support a single input numeric series. The type is INT32 / INT64 / FLOAT / DOUBLE.</p><p><strong>Parameters:</strong></p><ul><li><code>tb</code>: The number of timestamp blocks. Its default value is 10.</li><li><code>vb</code>: The number of value blocks. Its default value is 10.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is INT32. The length is <code>tb*vb</code>. The timestamps starting from 0 only indicate the order.</p><p><strong>Note:</strong></p><ul><li>Parameters <code>tb</code> and <code>vb</code> should be positive integers.</li></ul><h3 id="examples-1" tabindex="-1"><a class="header-anchor" href="#examples-1" aria-hidden="true">#</a> Examples</h3><h4 id="assigning-window-size-and-dimension" tabindex="-1"><a class="header-anchor" href="#assigning-window-size-and-dimension" aria-hidden="true">#</a> Assigning Window Size and Dimension</h4><p>Input Series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+---------------+
| Time|root.test.d0.s0|
+-----------------------------+---------------+
|2020-01-01T00:00:01.000+08:00| -4.0|
|2020-01-01T00:00:02.000+08:00| -3.0|
|2020-01-01T00:00:03.000+08:00| -2.0|
|2020-01-01T00:00:04.000+08:00| -1.0|
|2020-01-01T00:00:05.000+08:00| 0.0|
|2020-01-01T00:00:06.000+08:00| 1.0|
|2020-01-01T00:00:07.000+08:00| 2.0|
|2020-01-01T00:00:08.000+08:00| 3.0|
|2020-01-01T00:00:09.000+08:00| 4.0|
+-----------------------------+---------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> representation<span class="token punctuation">(</span>s0<span class="token punctuation">,</span><span class="token string">&quot;tb&quot;</span><span class="token operator">=</span><span class="token string">&quot;3&quot;</span><span class="token punctuation">,</span><span class="token string">&quot;vb&quot;</span><span class="token operator">=</span><span class="token string">&quot;2&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d0
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output Series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+-------------------------------------------------+
| Time|representation(root.test.d0.s0,&quot;tb&quot;=&quot;3&quot;,&quot;vb&quot;=&quot;2&quot;)|
+-----------------------------+-------------------------------------------------+
|1970-01-01T08:00:00.001+08:00| 1|
|1970-01-01T08:00:00.002+08:00| 1|
|1970-01-01T08:00:00.003+08:00| 0|
|1970-01-01T08:00:00.004+08:00| 0|
|1970-01-01T08:00:00.005+08:00| 1|
|1970-01-01T08:00:00.006+08:00| 1|
+-----------------------------+-------------------------------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="rm" tabindex="-1"><a class="header-anchor" href="#rm" aria-hidden="true">#</a> RM</h2><h3 id="usage-2" tabindex="-1"><a class="header-anchor" href="#usage-2" aria-hidden="true">#</a> Usage</h3><p>This function is used to calculate the matching score of two time series according to the representation.</p><p><strong>Name:</strong> RM</p><p><strong>Input Series:</strong> Only support two input numeric series. The type is INT32 / INT64 / FLOAT / DOUBLE.</p><p><strong>Parameters:</strong></p><ul><li><code>tb</code>: The number of timestamp blocks. Its default value is 10.</li><li><code>vb</code>: The number of value blocks. Its default value is 10.</li></ul><p><strong>Output Series:</strong> Output a single series. The type is DOUBLE. There is only one data point in the series, whose timestamp is 0 and value is the matching score.</p><p><strong>Note:</strong></p><ul><li>Parameters <code>tb</code> and <code>vb</code> should be positive integers.</li></ul><h3 id="examples-2" tabindex="-1"><a class="header-anchor" href="#examples-2" aria-hidden="true">#</a> Examples</h3><h4 id="assigning-window-size-and-dimension-1" tabindex="-1"><a class="header-anchor" href="#assigning-window-size-and-dimension-1" aria-hidden="true">#</a> Assigning Window Size and Dimension</h4><p>Input Series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+---------------+---------------+
| Time|root.test.d0.s0|root.test.d0.s1
+-----------------------------+---------------+---------------+
|2020-01-01T00:00:01.000+08:00| -4.0| -4.0|
|2020-01-01T00:00:02.000+08:00| -3.0| -3.0|
|2020-01-01T00:00:03.000+08:00| -3.0| -3.0|
|2020-01-01T00:00:04.000+08:00| -1.0| -1.0|
|2020-01-01T00:00:05.000+08:00| 0.0| 0.0|
|2020-01-01T00:00:06.000+08:00| 1.0| 1.0|
|2020-01-01T00:00:07.000+08:00| 2.0| 2.0|
|2020-01-01T00:00:08.000+08:00| 3.0| 3.0|
|2020-01-01T00:00:09.000+08:00| 4.0| 4.0|
+-----------------------------+---------------+---------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>SQL for query:</p><div class="language-sql line-numbers-mode" data-ext="sql"><pre class="language-sql"><code><span class="token keyword">select</span> rm<span class="token punctuation">(</span>s0<span class="token punctuation">,</span> s1<span class="token punctuation">,</span><span class="token string">&quot;tb&quot;</span><span class="token operator">=</span><span class="token string">&quot;3&quot;</span><span class="token punctuation">,</span><span class="token string">&quot;vb&quot;</span><span class="token operator">=</span><span class="token string">&quot;2&quot;</span><span class="token punctuation">)</span> <span class="token keyword">from</span> root<span class="token punctuation">.</span>test<span class="token punctuation">.</span>d0
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Output Series:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>+-----------------------------+-----------------------------------------------------+
| Time|rm(root.test.d0.s0,root.test.d0.s1,&quot;tb&quot;=&quot;3&quot;,&quot;vb&quot;=&quot;2&quot;)|
+-----------------------------+-----------------------------------------------------+
|1970-01-01T08:00:00.001+08:00| 1.00|
+-----------------------------+-----------------------------------------------------+
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div>`,55);function d(o,l){return n(),s("div",null,[i(`
​ 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.
`),r])}const c=e(t,[["render",d],["__file","Machine-Learning.html.vue"]]);export{c as default};