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    <title>CAD开发者社区 - S函数</title>
    <link>https://www.cadn.net.cn/portal.php?mod=list&amp;catid=486</link>
    <description>Latest 20 articles of S函数</description>
    <copyright>Copyright(C) CAD开发者社区</copyright>
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    <item>
      <title>setview（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6182</link>
      <description><![CDATA[为指定视口建立视图]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:42:19 +0000</pubDate>
    </item>
    <item>
      <title>showhtmlmodalwindow（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6183</link>
      <description><![CDATA[显示具有指定 URI（统一资源标识符）的模式对话框]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:40:39 +0000</pubDate>
    </item>
    <item>
      <title>sin（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6184</link>
      <description><![CDATA[返回角度的正弦值，作为以弧度表示的实数]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:38:59 +0000</pubDate>
    </item>
    <item>
      <title>snvalid（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6185</link>
      <description><![CDATA[检查符号表名称中是否有有效字符]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:37:19 +0000</pubDate>
    </item>
    <item>
      <title>sqrt（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6186</link>
      <description><![CDATA[返回数字的平方根作为实数]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:35:39 +0000</pubDate>
    </item>
    <item>
      <title>ssadd（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6187</link>
      <description><![CDATA[将对象（实体）添加到选择集，或创建新的选择集]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:33:59 +0000</pubDate>
    </item>
    <item>
      <title>ssdel（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6188</link>
      <description><![CDATA[从选择集中删除对象（实体）]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:32:19 +0000</pubDate>
    </item>
    <item>
      <title>ssget（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6189</link>
      <description><![CDATA[从选定对象创建选择集]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:30:39 +0000</pubDate>
    </item>
    <item>
      <title>ssgetfirst（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6190</link>
      <description><![CDATA[确定选择和抓取哪些对象]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:28:59 +0000</pubDate>
    </item>
    <item>
      <title>sslength（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6191</link>
      <description><![CDATA[返回一个整数，其中包含选择集中的对象（实体）数]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:27:19 +0000</pubDate>
    </item>
    <item>
      <title>ssmemb（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6192</link>
      <description><![CDATA[测试对象（实体）是否为选择集的成员]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:25:39 +0000</pubDate>
    </item>
    <item>
      <title>ssname（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6193</link>
      <description><![CDATA[返回选择集的索引元素的对象（实体）名称]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:23:59 +0000</pubDate>
    </item>
    <item>
      <title>ssnamex（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6194</link>
      <description><![CDATA[检索有关如何创建选择集的信息。]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:22:19 +0000</pubDate>
    </item>
    <item>
      <title>sssetfirst（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6195</link>
      <description><![CDATA[设置选择和抓取的对象]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:20:39 +0000</pubDate>
    </item>
    <item>
      <title>startapp（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6196</link>
      <description><![CDATA[启动外部应用程序]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:18:59 +0000</pubDate>
    </item>
    <item>
      <title>strcase（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6197</link>
      <description><![CDATA[返回一个字符串，其中所有字母字符都已转换为大写或小写]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:17:19 +0000</pubDate>
    </item>
    <item>
      <title>strcat（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6198</link>
      <description><![CDATA[返回一个字符串，该字符串是多个字符串的串联]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:15:39 +0000</pubDate>
    </item>
    <item>
      <title>strlen（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6199</link>
      <description><![CDATA[返回一个整数，该整数是字符串中的字符数]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:13:59 +0000</pubDate>
    </item>
    <item>
      <title>subst（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6200</link>
      <description><![CDATA[在列表中搜索旧项，并返回列表的副本，其中替换了旧项的每次出现项]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:12:19 +0000</pubDate>
    </item>
    <item>
      <title>substr（AutoLISP）</title>
      <link>https://www.cadn.net.cn/portal.php?mod=view&amp;aid=6201</link>
      <description><![CDATA[返回字符串的子字符串]]></description>
      <category>S函数</category>
      <author>admin</author>
      <pubDate>Sat, 07 Jan 2023 09:10:39 +0000</pubDate>
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