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uweb/gnuplot/index.html

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<!DOCTYPE html>
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利用浏览器地址栏对函数作图
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</title>
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<span>HOME</span>
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<div id="toc" class="toc-article">
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<ol class="toc"><li class="toc-item toc-level-4"><a class="toc-link" href="#安装gnuplot"><span class="toc-text">安装gnuplot</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#地址栏功能配置："><span class="toc-text">地址栏功能配置：</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#配置文件-sdcard-uweb-default-acmd如下："><span class="toc-text">配置文件/sdcard/uweb/default.acmd如下：</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#常见问题及诊断"><span class="toc-text">常见问题及诊断</span></a></li></ol>
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利用浏览器地址栏对函数作图
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<span class="attr">Post：<span>2019-06-05 17:55:34</span></span>
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<span class="attr">Tags：/
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<a class="tag" href="/uWeb/tags/#termux" title="termux">termux</a>
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<p>使用Android端<a href="..">uweb浏览器</a>。<br>Termux提供了方便的软件包管理系统，缺省的uWeb地址栏功能配置需用到作图软件gnuplot。</p>
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<h4 id="安装gnuplot"><a href="#安装gnuplot" class="headerlink" title="安装gnuplot"></a>安装gnuplot</h4><ul><br><li>安装<a href="https://www.wocloud.com.cn/webclient/share/sindex.action?id=1p00SB1kA2JpoBce2QHhbgmbxuq0yhuZAjUZYCZyVGCLivSf0dTfmw==" target="_blank" rel="noopener">uweb定制Termux应用</a></li><br><li>Termux下运行以下命令：<br>apt update<br>apt upgrade<br>apt install gnuplot</li><br></ul>
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<h4 id="地址栏功能配置："><a href="#地址栏功能配置：" class="headerlink" title="地址栏功能配置："></a>地址栏功能配置：</h4><ul>
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<li>配置文件&lt;a href=e:/sdcard/uweb/default.acmd&gt;/sdcard/uweb/default.acmd每行格式如下：<br> 菜单名:mimeType:命令行</li>
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<li>命令行可包含参数%s，运行时自动用地址栏输入内容替换。</li>
<li>如果浏览器窗口当前地址为本地url，则此目录同时作为命令行工作目录。</li>
</ul>
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<h4 id="配置文件-sdcard-uweb-default-acmd如下："><a href="#配置文件-sdcard-uweb-default-acmd如下：" class="headerlink" title="配置文件/sdcard/uweb/default.acmd如下："></a>配置文件/sdcard/uweb/default.acmd如下：</h4><pre><code>命令:text/plain:%s
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函数作图:image/svg+xml:gnuplot -e &apos;set term svg;set output; plot %s&apos;
函数作图(3d):image/svg+xml:gnuplot -e &apos;set term svg;set output; splot %s&apos;
超级计算器:text/html:echo &quot;%s&quot;|bc -l -q
</code></pre><p>长按uweb浏览器底部工具条刷新按钮弹出地址栏功能选择，选择“函数作图”，地址栏内输入函数如sin(x)**5就可显示函数图案。</p>
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<h4 id="常见问题及诊断"><a href="#常见问题及诊断" class="headerlink" title="常见问题及诊断"></a>常见问题及诊断</h4><ul>
<li>确保gnuplot正确安装，在Termux提示符下，敲入gnuplot,然后回车，保证出现”gnuplot&gt;”。</li>
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<li>确保gnuplot正常运行, 在Termux提示符下，执行下面命令：<br><code>gnuplot -e &#39;set term svg;set output; plot x&#39;</code><br>屏幕输出应该为正常的svg文件（类似html文本）。</li>
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<li>Termux应为uweb定制包，否则有一堆设定需要修改。</li>
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<li>超微浏览器下长按设置按钮，勾选“标准错误输出”。再次在地址栏执行画图操作，此时浏览器会显示出错信息。</li>
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<li>为保证地址栏输入函数符合gnuplot规范，首个测试函数建议为”x”，即整个地址栏内输入为”x”。</li>
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</ul>
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