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<!DOCTYPE html>
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<a href="/" id="subtitle">Self-discipline is one of the ways to get happiness</a>
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<article id="post-python-data-analysis-and-application" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2019/03/05/python-data-analysis-and-application/" class="article-date">
<time datetime="2019-03-05T11:28:13.000Z" itemprop="datePublished">2019-03-05</time>
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<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2019/03/05/python-data-analysis-and-application/">Python_Data_Analysis_and_Application</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<h2 id="数据分析流程"><a href="#数据分析流程" class="headerlink" title="数据分析流程"></a>数据分析流程</h2><img src="/2019/03/05/python-data-analysis-and-application/move.jpg">
<img src="/2019/03/05/python-data-analysis-and-application/dataAnalysis.png">
<h3 id="(一)需求分析"><a href="#(一)需求分析" class="headerlink" title="(一)需求分析"></a>(一)需求分析</h3><ul>
<li>需求分析是产品设计的第一步,也是最关键的一步,它直接决定了产品方向。</li>
<li>需求分析主要从用户提出的需求出发,挖掘用户内心的真实意图,并转换为产品需求。</li>
</ul>
<ul>
<li>同理,数据分析中需求分析是数据分析环节的第一步,也是非常重要的一步,他决定了后续的分析方向和方法。</li>
<li>数据分析中需求分析主要内容: 根据 <strong>业务、 生产和财务等部门</strong> 的需要,结合现有的数据,提出数据分析需求的<br>整体 <strong>分析方向、 分析内容</strong>,最终和需求方达成一致意见。 </li>
</ul>
<hr>
<h3 id="(二)数据获取"><a href="#(二)数据获取" class="headerlink" title="(二)数据获取"></a>(二)数据获取</h3><ul>
<li>数据获取主要有两种方式: 网络数据(爬虫)与本地数据。</li>
<li>网络数据是指在存储在互联网中的各类 <strong>视频、图片、语音和文字</strong> 等信息。</li>
<li>本地数据是指存储在本地数据库中的 <strong>生产、营销、和财务</strong> 等系统产生的数据。<ul>
<li>本地数据按照数据时间可分为两部分: <strong>历史数据和实时数据</strong>。</li>
</ul>
</li>
</ul>
<p><strong><em>说明: 在数据分析过程中,具体使用哪种数据获取方式,根据需求分析的结果来确定。</em></strong></p>
<hr>
<h3 id="(三)数据预处理"><a href="#(三)数据预处理" class="headerlink" title="(三)数据预处理"></a>(三)数据预处理</h3><ul>
<li>数据预处理是指对数据进行 <strong>数据合并、 数据清洗、 数据标准化和数据变换</strong> 等操作。</li>
<li>数据合并可以将多张相互关联的表格合为一张。</li>
<li>数据清洗可以去掉 <strong>重复、 缺失、 异常、 不一致</strong> 的数据。</li>
<li>数据标准化可以去除特征间的量纲差异。</li>
<li>数据变换可以通过 <strong>离散化、 哑变量处理</strong> 等技术为后期分析和建模的要求。</li>
</ul>
<p><strong><em>说明: 数据预处理的各个过程没有明确的先后顺序。</em></strong> </p>
<hr>
<h3 id="(四)分析与建模"><a href="#(四)分析与建模" class="headerlink" title="(四)分析与建模"></a>(四)分析与建模</h3><ul>
<li>分析与建模是指通过 <strong>对比分析、 分组分析、 交叉分析、 回归分析</strong> 等分析方法,<br>以及 <strong>聚类模型、 分类模型、 关联模型、 智能推荐</strong> 等模型与算法,发现数据中的价值信息,并得出结论的过程。</li>
</ul>
<hr>
<h3 id="(五)模型评价与评优"><a href="#(五)模型评价与评优" class="headerlink" title="(五)模型评价与评优"></a>(五)模型评价与评优</h3><ul>
<li>模型评价是指对已建立的模型,根据 <strong>模型的类别</strong>,使用不同的指标评价其性能优劣的过程。</li>
</ul>
<hr>
<h3 id="(六)部署"><a href="#(六)部署" class="headerlink" title="(六)部署"></a>(六)部署</h3><ul>
<li>部署是指将数据分析结果与结论应用与实际生产系统的过程。</li>
<li>根据需求不同,部署可以是一份包含现状具体整改措施的 <strong>数据分析报告</strong>,<br>也可以是将模型部署在整个生产系统的 <strong>解决方案</strong>。</li>
</ul>
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<article id="post-insert-image-to-md" class="article article-type-post" itemscope itemprop="blogPost">
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<a href="/2019/03/03/insert-image-to-md/" class="article-date">
<time datetime="2019-03-03T13:10:50.000Z" itemprop="datePublished">2019-03-03</time>
</a>
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<h1 itemprop="name">
<a class="article-title" href="/2019/03/03/insert-image-to-md/">insert_image_to_md</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<h3 id="方法一:-组织化管理资源文件"><a href="#方法一:-组织化管理资源文件" class="headerlink" title="方法一: 组织化管理资源文件"></a>方法一: 组织化管理资源文件</h3><ol>
<li>将配置文件<strong>_config.yml</strong>中的参数<strong>post_asset_floder</strong>默认值改为 true。</li>
<li>在hexo目录下执行<strong>npm install hexo-asset-image –save</strong> , 即安装本地上传图片的插件。</li>
<li>再执行<strong>hexo n filename</strong>, 此时在_posts文件夹中生成一个filename.md和一个filename文件夹。</li>
<li>把图片复制到filename文件中,此时通过常规的markdown语法它不会出现在首页上,在Hexo3中,使用下面标签插件代码即可:<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">{% asset_path slug %\} or \{% asset_img slug [title] %\} or \{% asset_link slug [title] %\}</span><br><span class="line">例如: {% asset_img example.jpg [title] %}</span><br></pre></td></tr></table></figure>
</li>
</ol>
<hr>
<h3 id="方法二:最简单的html图片标签"><a href="#方法二:最简单的html图片标签" class="headerlink" title="方法二:最简单的html图片标签"></a>方法二:最简单的html图片标签<img></h3><ol>
<li>在source文件中建立images文件。</li>
<li>在md文件中写入html图片标签:<strong><em><img src=”images/图片名.jpg”></em></strong>。</li>
</ol>
<hr>
<h4 id="效果如图:"><a href="#效果如图:" class="headerlink" title="效果如图:"></a>效果如图:</h4><img src="/2019/03/03/insert-image-to-md/car.jpg">
<h4 id="More-info-官网说明指南"><a href="#More-info-官网说明指南" class="headerlink" title="More info: 官网说明指南"></a>More info: <a href="https://hexo.io/zh-cn/docs/asset-folders" target="_blank" rel="noopener">官网说明指南</a></h4>
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<article id="post-hello-world" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2019/02/26/hello-world/" class="article-date">
<time datetime="2019-02-26T01:12:57.250Z" itemprop="datePublished">2019-02-26</time>
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<h1 itemprop="name">
<a class="article-title" href="/2019/02/26/hello-world/">Hello World</a>
</h1>
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<div class="article-entry" itemprop="articleBody">
<p>Welcome to <a href="https://hexo.io/" target="_blank" rel="noopener">Hexo</a>! This is your very first post. Check <a href="https://hexo.io/docs/" target="_blank" rel="noopener">documentation</a> for more info. If you get any problems when using Hexo, you can find the answer in <a href="https://hexo.io/docs/troubleshooting.html" target="_blank" rel="noopener">troubleshooting</a> or you can ask me on <a href="https://github.com/hexojs/hexo/issues" target="_blank" rel="noopener">GitHub</a>.</p>
<h2 id="Quick-Start"><a href="#Quick-Start" class="headerlink" title="Quick Start"></a>Quick Start</h2><h3 id="Create-a-new-post"><a href="#Create-a-new-post" class="headerlink" title="Create a new post"></a>Create a new post</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo new <span class="string">"My New Post"</span></span><br></pre></td></tr></table></figure>
<p>More info: <a href="https://hexo.io/docs/writing.html" target="_blank" rel="noopener">Writing</a></p>
<h3 id="Run-server"><a href="#Run-server" class="headerlink" title="Run server"></a>Run server</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo server</span><br></pre></td></tr></table></figure>
<p>More info: <a href="https://hexo.io/docs/server.html" target="_blank" rel="noopener">Server</a></p>
<h3 id="Generate-static-files"><a href="#Generate-static-files" class="headerlink" title="Generate static files"></a>Generate static files</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo generate</span><br></pre></td></tr></table></figure>
<p>More info: <a href="https://hexo.io/docs/generating.html" target="_blank" rel="noopener">Generating</a></p>
<h3 id="Deploy-to-remote-sites"><a href="#Deploy-to-remote-sites" class="headerlink" title="Deploy to remote sites"></a>Deploy to remote sites</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$ hexo deploy</span><br></pre></td></tr></table></figure>
<p>More info: <a href="https://hexo.io/docs/deployment.html" target="_blank" rel="noopener">Deployment</a></p>
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<a href="/2019/03/05/python-data-analysis-and-application/">Python_Data_Analysis_and_Application</a>
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