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CARDS;

100.0 82.0 65.0 52.0 44.0 36.0 30.0 25.0 21.0 17.0 14.0 11.0 9.0 7.5 6.0 5.0 4.0 3.3 ;

[Àý39] ÒԽ̲ÄP215Àý11.2ΪÀý£¨y=axb£©¡£ DATA tb113; INPUT x y @@; xt=LOG(x); yt=LOG(y); CARDS;

2.0 0.8 2.5 2.2 3.0 5.6 3.4 9.3 3.7 14.6 4.1 20.0 4.4 28.0 4.8 33.3 4.9 38.7 5.0 42.7 ;

PROC REG;

MODEL yt=xt; RUN;

PROC NLIN METHOD=DUD; PARMS a=0.1 b=5; MODEL y=a*x**b; RUN;

[Àý40] ÒԽ̲ÄP217Àý11.3ΪÀý£¨

DATA tb114;

DO x=0 TO 24 BY 3; INPUT y @@; OUTPUT; END; CARDS;

0.30 0.72 3.31 9.71 13.09 16.85 17.79 18.23 18.43 ;

PROC NLIN METHOD=DUD;

PARMS a=10 b=0.1 k=20; MODEL y=k/(1+a*EXP(-b*x)); RUN;

[Àý41] ÒԽ̲ÄP220Àý11.4ΪÀý£¨¶àÏîʽ»Ø¹é£©¡£ DATA tb115; INPUT x y @@; x2=x*x; x3=x*x*x; CARDS;

3.37 349 4.12 374 4.87 388 5.62 395 6.37 401 7.12 397 7.87 384 ;

PROC REG;

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MODEL y=x x2 x3 / SELECTION=STEPWISE; PLOT y*x; RUN;

PROC GLM;

MODEL y=x x*x; RUN;

PROC NLIN METHOD=GAUSS; PARMS b0=1 b1=1 b2=1; MODEL y=b0+b1*x+b2*x*x; DER.b0=1; DER.b1=x; DER.b2=x*x; RUN;

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1£®»Ý´ó·á£¬½ª³¤¼ø ±àÖø£®1996£®Í³¼Æ·ÖÎöϵͳSASÈí¼þʵÓý̳̣®±±¾©º½¿Õº½Ìì´óѧ³ö°æÉ磮

2£®¸Ç¾ûï× Ö÷±à£®2000£®ÊÔÑéͳ¼Æ·½·¨£®ÖйúÅ©Òµ³ö°æÉ磮

3£®SAS Institute Inc.1988. SAS/STAT User¡¯s Guide, Release 6.03 Edition, Cary, NC, USA.

4£®SAS Institute Inc. 1988. SAS Procedures Guide, Release 6.03 Edition, Cary, NC, USA.

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