如何把变量中的运算函数转化为真正的运算？

data homework;
array expr(5) $ ('5','+','exp(','*','7.25');
formu=cats(expr(1),expr(2),expr(3),expr(5),')',expr(4),expr(5));
/*上面希望得到5+exp(7.25)*7.25的结果*/
run;


谢谢！

1. * use of the value should be added in the call execute() statement;
   
2. data homework;
   
3. array expr(5) $ ('5','+','exp(','*','7.25');
   
4. formu1=cats(expr(1),expr(2),expr(3),expr(5),')',expr(4),expr(5));
   
5. 
   
6. call execute('Data homework; set homework;' || 'formu=' ||formu1|| '; put formu= ; run; ');
   
7. drop formu1;
   
8. run;
   
9. proc print data=homework; title 'homework'; run; title;

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yongyitian 发表于 2014-8-4 22:56

yongyitian 发表于 2014-8-4 22:56