SAS应用_医学统计学的例题程序及其结果,学习SAS的必备资料.

				data ex20_1;
				  input x1-x4;
				cards;
				 40      2.0       5      20
				 10      1.5       5      30
				120      3.0      13      50
				250      4.5      18       0
				120      3.5       9      50
				 10      1.5      12      50
				 40      1.0      19      40
				270      4.0      13      60
				280      3.5      11      60
				170      3.0       9      60
				180      3.5      14      40
				130      2.0      30      50
				220      1.5      17      20
				160      1.5      35      60
				220      2.5      14      30
				140      2.0      20      20
				220      2.0      14      10
				 40      1.0      10       0
				 20      1.0      12      60
				120      2.0      20       0
				;
				proc princomp;
				run;