宏变量无法用下划线来解析

Question

在使用下划线尝试获取宏变量以在宏定义内部解析时遇到问题。我想保持我在这里的命名约定，但需要宏变量来解决这样做。我错过了什么？

%macro mymacro(dd=,mm=,yy=,dnr=,dma=); 
. 
. 
. 

%if dnr = 1 %then %let dnrname=est; 
%if dnr = 2 %then %let dnrname=cen; 
%if dnr = 3 %then %let dnrname=mtec; 
%if dnr = 4 %then %let dnrname=pac; 
%if dnr = 5 %then %let dnrname=mtwp; 

data setoff_&dnrname._&dma._&mm.&dd.&yy.; 
    set restart_no retimed one_min_durations; 
run; 
. 
. 
. 
%mend mymacro; 

错误的样子：

NOTE: Line generated by the invoked macro "SETOFF". 
89  data setoff_&dnrname._&dma._&mm.&dd.&yy.;  set restart_no retimed one_min_durations; 
        - 
        22 
        200 
89 ! run; proc sort data = setoff_&dnrname._&dma._&mm.&dd.&yy.;  by &dims_list. sid; run; 

ERROR 22-322: Syntax error, expecting one of the following: a name, a quoted string, (, /, ;, 
       _DATA_, _LAST_, _NULL_. 

Answer 1

%if dnr = 1 %then %let dnrname=est;

这就是问题所在。 dnr永不等于1。您错过了＆符号。