在SAS中执行变量测试

Question

我想知道是否有可能对SAS中的数据集中的所有变量执行ttest(proc ttest).可能通过循环数据？

这是我目前所拥有的,但它没有正确运行:

data test;
set work.wisc;
array Avar(30) V1-V30;
do variable = 1 to 30;
    proc ttest data = work.wisc;
    class Diagnosis;
    var Avar(variable);
    end;
run;

任何帮助深表感谢.谢谢!

Answer 1

这样的事可能有用.&&name&i.在循环中调用将引用每个变量名称.您可能需要在proc ttest中进行一些调整,因为我不熟悉该功能.

/* -- Get the names of the variables --*/
proc contents data = work.wisc out = names noprint;  run;

/*--- Make macro vars needed ---*/
proc sql noprint;
 select
   count(distinct name) into :name_count from names;
 select
   distinct name into :name1 - :name9999 from names;
quit;

/*--- Strip spaces from name_count ---*/
%let name_count = &name_count.;

%put There are &name_count. variables in the data set;

/*--- Run the test for all variables ---*/
%macro testAll();
%do i = 1 %to &name_count.;
   proc ttest data = work.wisc;
       class Diagnosis;
       var Avar(&&name&i.);
   run;
%end;
%mend;
%testAll();