OPTIONS LS=75;

DATA a;
 
 INFILE 'h2so4.dat';
 
 INPUT Smoker
       PtNo
	   Day
	   Hour
	   SGAW
	   FRC
	   FVC
	   FEV1
	   FEV3
	   PHASEIII
	   PHASEIV
	   CLSTAT
	   CLDYN48
	   RL;                                                           

PROC SORT;  BY DAY HOUR;

PROC MEANS; BY DAY HOUR;

RUN;