相关分析上机实验.ppt

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1、2021/10/61第二讲相关分析非线性回归2021/10/62例甘薯实生苗栽培试验中薯块重x1(g)、块根粗x2(mm)、单株结薯数x3及单株产量y(g)的12组观测值如下表，求三种相关系数。组号x1x2x3y14.07.254.7416.724.07.253.375.034.58.56.791.744.05.74.4166.756.09.02.025.060.54.252.025.070.54.02.575.082.06.03.050.092.05.03.7166.7100.54.03.050.0111.04

2、.02.575.0122.07.05.0300.02021/10/63Dataex;inputx1-x4@@;Cards;4.07.254.7416.74.07.253.375.04.58.56.791.74.05.74.4166.76.09.02.025.00.54.252.025.00.54.02.575.02.06.03.050.02.05.03.7166.70.54.03.050.01.04.02.575.02.07.05.0300.0;proccorr;varx1-x4;proccorr;varx1x2

3、;partialx3x4;proccorr;varx1x3;partialx2x4;proccorr;varx1x4;partialx2x3;proccorr;varx2x3;partialx1x4;proccorr;varx2x4;partialx1x3;proccorr;varx3x4;partialx1x2;procreg;modelx4=x1-x3;procreg;modelx3=x1x2x4;procreg;modelx2=x1x3x4;procreg;modelx1=x2-x4;run;(变量的记号x

4、4也可以为y)2021/10/64例中三种相关系数总表j1j2x1x2x3yx10.9101*0.8942*-0.15100.0203x20.9074*0.9200*0.3270-0.0372x30.37710.48220.67270.5166y0.18780.23760.55670.5581表中位于主对角线左下方的数字为简单相关系数，位于主对角线右上方的数字为偏相关系数，位于主对角线的数字为复相关系数，标有*的数字当显著性水平为0.05时是显著的。2021/10/65例2.1dataex;inputx1-x4y

5、@@;cards;10233.611315.79203.610614.510223.711117.513213.710922.510223.611015.510233.510316.98233.31008.610243.41141710203.410413.710213.411013.410233.910420.38213.510910.26233.21147.48213.711311.69223.610512.3;proccorr;varx1-x4y;proccorr;varx1x2;partialx3x4y;

6、proccorr;varx1x3;partialx2x4y;proccorr;varx1x4;partialx2x3y;proccorr;varx2x3;partialx1x4y;proccorr;varx2x4;partialx1x3y;proccorr;varx3x4;partialx1x2y;proccorr;varx1y;partialx2-x4;proccorr;varx2y;partialx1x3x4;proccorr;varx3y;partialx1x2x4;proccorr;varx4y;part

7、ialx1-x3;procreg;modelx4=x1-x3y;procreg;modelx3=x1x2x4y;procreg;modelx2=x1x3x4y;procreg;modelx1=x2-x4y;procreg;modely=x1-x4;run;2021/10/66例2.3datazq;inputx1x2y1-y3@@;cards;9.22.01418646.314.39.12.1716930.7148.62.258171144.669.310.22.20617169.222.75.62.0671811

8、67.35.42.19717112.386.12.171742.71.38.22.117226.37.98.81.983186247.185.27.62.14617647.712.79.72.07417653.625.38.42.102172137.65812.22.284176118.943.310.32.24216162.729.38.92.28317126.28.3