http://202.127.29.3/~shen/wiki/index.php?action=history&feed=atom&title=%E5%AD%97%E7%AC%A6%E4%B8%B2%E6%9B%BF%E6%8D%A2 字符串替换 - 版本历史 2026-05-13T06:10:08Z 本wiki上该页面的版本历史 MediaWiki 1.38.1 http://202.127.29.3/~shen/wiki/index.php?title=%E5%AD%97%E7%AC%A6%E4%B8%B2%E6%9B%BF%E6%8D%A2&diff=62&oldid=prev 218.69.12.2：​以“ == 例1：空格替换为‘-’ == Str = 'STRSPLIT chops up strings.' print, STRJOIN(STRSPLIT(Str, /EXTRACT), '-') == 例2：变量名非法字符替换为'_'...”为内容创建页面 2012-04-07T05:41:11Z <p>以“ == 例1：空格替换为‘-’ == Str = &#039;STRSPLIT chops up strings.&#039; print, STRJOIN(STRSPLIT(Str, /EXTRACT), &#039;-&#039;) == 例2：变量名非法字符替换为&#039;_&#039;...”为内容创建页面</p> <p><b>新页面</b></p><div><br /> == 例1：空格替换为‘-’ ==<br /> <br /> Str = &#039;STRSPLIT chops up strings.&#039;<br /> print, STRJOIN(STRSPLIT(Str, /EXTRACT), &#039;-&#039;)<br /> <br /> <br /> == 例2：变量名非法字符替换为&#039;_&#039; ==<br /> <br /> nonvalid_chars=&quot;[]() /|\,.&lt;&gt;!@#%^&amp;*+=-&quot;<br /> var_name=&#039;&#039;var*name&#039; ; 变量名中不应出现上面的非法字符<br /> var_name=strjoin(STRSPLIT(var_name,nonvalid_chars,/extract),&quot;_&quot;)<br /> <br /> <br /> == 例三：替换&#039;REGEX&#039; 为 ‘XEGER’ ==<br /> <br /> 用关键词/REGEX<br /> print, strjoin(strsplit(&#039;_REGEX_test_R&#039;,&#039;REGEX&#039;,/REGEX,/<br /> extract),&#039;XEGER&#039;)<br /> <br /> <br /> == 例四：替换中使用正则表达式 ==<br /> <br /> str = &#039;&lt;4&gt;What&lt;1&gt;a&lt;7&gt;tangled&lt;3&gt;web&lt;2&gt;we&lt;6&gt;weave.&#039;<br /> S = STRSPLIT(str,&#039;&lt;[0-9]+&gt;&#039;,/EXTRACT,/REGEX)<br /> PRINT, STRJOIN(S, &#039; &#039;)<br /> <br /> *问题：首字母如何替换？<br /> **用上/PRESERVE_NULL 选项</div> 218.69.12.2