Hoja de preparación de datos

proc cas; dataStep.runCode / code="data casuser.signals; do t = 1 to 1000; s1 = sin(t/10); s2 = mod(t, 20)-10; s3 = rannor(1); x1 = 0.6*s1 + 0.4*s2; x2 = 0.3*s2 + 0.7*s3; x3 = 0.2*s1 + 0.3*s2 + 0.5*s3; output; end; run;"; run;