Sas 无法将宏变量与数据集变量匹配

数据集中的字符变量从不与宏变量匹配。%IF循环永远不会实现。好心的建议

我尝试按月份匹配，并相应地尝试创建数组，并仅对特定月份进行计数。无法工作，因为month宏变量从未与具有month的数据集变量匹配

/*create dummy data*/
  data datefile;
  input tran_date date9. cnt 3.;
  datalines;
 13feb2015 5
 10feb2015 4
 11feb2015 3
 05feb2015 8
 08feb2015 5
 01jan2015 1
 20dec2014 1
 31jan2015 2
 23dec2014 2
 12jan2015 1
   ;


 /*calculate month*/
data datefile11;
set datefile;
tran_mon=year(tran_date)*100+month(tran_date);
run;

/*select distinct month*/
proc sql;
create table datefile12 as select distinct(tran_mon)
from datefile11 order by tran_mon;
quit;

/*convert month from numeric to character*/
data datefile11(drop=tran_mon);
informat tran_mon2 $6.;
set datefile11;
tran_mon2=tran_mon;
run;

/*create macro variables through datastep*/
data datefile13;
set datefile12;
monum = cat('mnth',_N_);
run;


data _null_;
set datefile13;
call symput(monum,trim(left(tran_mon)));
run;



/*use array to make separate column for each month and 
  put split count for each month to each colunms*/
  %macro c;
  proc sql noprint;
  select count(1) into :nrow from datefile13;
  quit;

  %let nrow = &nrow;

  data datefile14;
  set datefile11;
  array mon{*} mon_1 - mon_&nrow;
  %do i=1 %to &nrow;
  %if tran_mon2 = &&mnth&i %then %do; %put tran_mon2; 
                                     mon_&i = cnt; %end;
  %else %do; mon_&i = 0 ; %end;
  %end;
  run;
  %mend c;

  %c

---

您的宏

%if%then%do

检查在数据步骤仍在编译时执行-当数据步骤开始执行时，不再有机会使用这样的宏逻辑

尝试另一种方法——使用

if编写循环，然后改为使用
data-step逻辑