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< title > 利用浏览器地址栏对函数作图< / title >
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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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< h1 class = "title" > 利用浏览器地址栏对函数作图
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< span class = "subtitle" > < / span >
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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 >
< h4 id = "安装gnuplot" > 安装gnuplot< / h4 >
< ul >
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< li > 安装 < a href = "../searchurl/plugins.html" > uweb定制Termux应用< / a > < / li >
< li > Termux下运行以下命令: < br >
apt update< br >
apt upgrade< br >
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apt install gnuplot< / li >
< / ul >
< h4 id = "地址栏功能配置" > 地址栏功能配置:< / h4 >
< 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 >
< 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defaultacmd如下" > 配置文件default.acmd如下: < / h4 >
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< pre > < code > 命令:text/plain:%s
函数作图:image/svg+xml:gnuplot -e 'set term svg;set output; plot %s'
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 >
< 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 >
< h4 id = "常见问题及诊断" > 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> " 。< / li >
< li > 确保gnuplot正常运行, 在Termux提示符下, 执行下面命令: < br >
< code > gnuplot -e 'set term svg;set output; plot x'< / 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 >
< 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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< p > Last Modified: 2 April 2024< br >
add js function in README< br >
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< pre > < / pre >
< / p >
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