通过SAS中的正则表达式在字符串中进行多次搜索和替换 [英] Multiple search and replace within a string through regular expression in SAS

问题描述

我有以下宏变量:

%let text = abcpqr{work};

我需要将 替换为 \，{ 替换为 { 和 } 与 } 通过正则表达式.

I need to replace with \, { with { and } with } by regular expression.

我尝试的代码出错了.

%let text = abcpqr{work};
data _null_;
   var=prxchange('s/\/\\/|s/{/ \{/|s/}/ \}/',-1,"&text");
   put var;
run;

另外，如果文本是BOLDITALICITALICBOLDBOLDITALICBIIBBI"，我需要将其转换为iibiiibi".

Also, if the text is "BOLDITALICITALICBOLDBOLDITALICBIIBBI", I need to convert it to "iibiiibi".

推荐答案

对于您的第一个问题，您应该将每个模式分成单独的 PRXCHANGE.我不认为 PRXCHANGE 允许 OR 操作数.如果运行此代码，它将为您工作:

For your first problem, you should be separating each pattern into a separate PRXCHANGE. I don't think PRXCHANGE allows OR operand in it. If run this code, it will work for you:

%let text = abcpqr{work};
data _null_;
   var=prxchange("s/\/\\/",-1,"&text");
   var=prxchange("s/{/\{/",-1,var);
   var=prxchange("s/}/\}/",-1,var);
   put var;
run;

同样的原则也适用于您的第二个查询:

The same principle applies to your second query:

%let text = BOLDITALICITALICBOLDBOLDITALICBIIBBI;
data _null_;
   var=prxchange("s/BOLD/b/",-1,"&text");
   var=prxchange("s/ITALIC/i/",-1,var);
   var=lowcase(var);
   put var;
run;

问候，瓦西里

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