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118 lines
4.3 KiB
HTML
118 lines
4.3 KiB
HTML
<!doctype html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<link rel="stylesheet" href="../style.css" type="text/css" />
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<title>利用浏览器地址栏对函数作图</title>
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<script type="text/javascript">
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function findLang(){
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let href = location.href;
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for(let i=href.length-1;i>0;i--){
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if('/'==href.charAt(i) && '/'==href.charAt(i-3))
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return i;
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}
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return 0;
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}
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function nav2(page){
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let i = findLang();
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location.href = location.href.substring(0,i+1)+page;
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}
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function nav2Lang(lang){
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let i = findLang();
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let href = location.href;
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location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
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}
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</script>
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</head>
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<body>
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<header class='header'>
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<a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
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<nav>
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</nav>
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</header>
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<br />
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<div class="container">
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<h1 class="title">利用浏览器地址栏对函数作图
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<br>
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<span class="subtitle"></span>
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</h1>
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<ul class="tags">
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<li><a href="../tags/termux/index.html">termux</a> </li>
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</ul>
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<p>使用Android端<a href="../index.html">uweb浏览器</a>。<br>
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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">安装gnuplot</h4>
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<ul>
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<li>安装 <a href="../searchurl/plugins.html">uweb定制Termux应用</a></li>
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<li>Termux下运行以下命令：<br>
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apt update<br>
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apt upgrade<br>
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apt install gnuplot</li>
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</ul>
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<h4 id="地址栏功能配置">地址栏功能配置：</h4>
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<ul>
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<li>配置文件<a href=e:default.acmd>default.acmd</a>每行格式如下：<br>
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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>
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<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>
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</ul>
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<h4 id="配置文件defaultacmd如下">配置文件default.acmd如下：</h4>
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<pre><code>命令:text/plain:%s
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函数作图:image/svg+xml:gnuplot -e 'set term svg;set output; plot %s'
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函数作图(3d):image/svg+xml:gnuplot -e 'set term svg;set output; splot %s'
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超级计算器:text/html:echo "%s"|bc -l -q
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</code></pre>
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<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">常见问题及诊断</h4>
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<ul>
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<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>"。</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>
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<code>gnuplot -e 'set term svg;set output; plot x'</code><br>
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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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</div>
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<p>Last Modified: 24 September 2022<br>
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remove /sdcard/uweb folder<br>
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<pre></pre>
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</p>
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<script>
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if(location.href.indexOf("/zh/")>0){
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var script = document.createElement("script");
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script.type = "text/javascript";
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script.src = "../../js/gissues.js";
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script.setAttribute("repo","jamesfengcao/uweb");
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script.setAttribute("issue-term","title");
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script.setAttribute("theme","github-light");
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script.async = true;
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document.body.appendChild(script);
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}
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</script>
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<script id='jsgiscus'
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src='https://giscus.app/client.js'
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data-repo="torappinfo/uweb"
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data-repo-id="MDEwOlJlcG9zaXRvcnkzMDIyMDU3MjE="
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data-category="Announcements"
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data-input-position="top"
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data-theme="light"
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data-lang="en"
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data-loading="lazy"
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crossorigin="anonymous" async>
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</script>
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</body>
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</html>
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