1、, lines) .)npcs是画出的主成分的个数;type是画出的碎石图的类型,是直方图,是折线图。(6)biplot()函数信息重叠图biplot()可画出数据关于主成分的散点图和原坐标在主成分下的方向。使用格式为biplot(object, choices = 1:2, scale = 1, pc.biplot = FALSE, .)其中,choices是选择的主成分,缺省为第一主成分和第二主成分。二例题例1:在某中学随机抽取某年级30名学生,测量其身高(X1)、体重(X2)、胸围(X3)和坐高(X4),数据如下,试对这30名中学生身体四项指标数据做主成分分析。# 用数据框形式输入数据s
2、tudent-data.frame( X1=c(148, 139, 160, 149, 159, 142, 153, 150, 151, 139, 140, 161, 158, 140, 137, 152, 149, 145, 160, 156, 151, 147, 157, 147, 157, 151, 144, 141, 139, 148), X2=c(41, 34, 49, 36, 45, 31, 43, 43, 42, 31, 29, 47, 49, 33, 31, 35, 47, 35, 47, 44, 42, 38, 39, 30, 48, 36, 36, 30, 32, 38),
3、 X3=c(72, 71, 77, 67, 80, 66, 76, 77, 77, 68, 64, 78, 78, 67, 66, 73, 82, 70, 74, 78, 73, 73, 68, 65, 80, 74, 68, 67, 68, 70), X4=c(78, 76, 86, 79, 86, 76, 83, 79, 80, 74, 74, 84, 83, 77, 73, 79, 79, 77, 87, 85, 82, 78, 80, 75, 88, 80, 76, 76, 73, 78) student.pr PCA$scores Comp.1 Comp.2 Comp.3 Comp.
4、4 Comp.5 Comp.6 Comp.7 Comp.8北京 -6.0881641 2.09605700 -0.967784530 0.25776803 0.0005352398 0.37264097 -0.259313644 0.101898159天津 -2.6531538 -0.89692239 .024*河北 1.1621365 0.30058573 -0.784504691 0.02193894 0.7896821227 -0.09836765 0.650193865 0.212926202山西 1.6499715 0.43010054 -0.460958474 0.40646178
5、 0.3690874371 0.07020928 -0.204588360 0.050284508内蒙古 1.6314462 0.57608823 0.441231853 0.06715704 0.2598856038 -0.12973344 -0.510229607 0.174135101辽宁 1.2429282 0.75205167 -0.051753055 0.33518942 0.4212833512 0.49894181 0.430659441 0.003292285吉林 1.6459349 0.25354850 0.112123455 0.21903096 0.4579875644
6、 0.32578858 0.139150622 -0.007332857黑龙江 1.8162784 0.31636032 -0.254967650 0.25832368 0.5430370763 0.42992066 0.261995255 0.089928521上海 -5.9388303 -0.16127086 0.413064801 1.23263843 -0.5779564955 0.73833944 0.239540230 0.019023710江苏 -0.1682782 0.03012142 -0.233423513 -0.26671292 -0.8701181382 -0.6567
7、9059 0.021191974 0.137926258浙江 -4.4178377 0.39587163 -0.969755399 -0.75820971 -0.0758300384 -0.56847898 0.052117591 -0.286139927安徽 1.8800460 -0.38729538 0.304359563 -0.03960882 -0.8785949113 0.26598394 0.146905761 0.144447324福建 -0.4665698 -0.90174490 0.729825867 -0.32744781 -0.3734575948 -0.26879668
8、 0.652548503 -0.146259386江西 2.5741394 -1.49544912 0.305732170 -0.13992335 -0.4700609392 0.05081704 -0.269775123 0.013447409山东 0.1042408 1.12235349 -0.187443665 -0.81020523 -0.1991289510 0.07042515 -0.353062197 0.196000659河南 1.8817327 -0.80438760 -0.167097210 -0.56844225 0.9028319618 0.13039124 0.125025151 -0.408239412湖北 1.1608958 -0.21343763 0.346801704 -0.80620043 -0.0452773092 0.72568824 -0.295122773 -0.070358039湖南 -0.4165050 -0.44372643 -0.001396215 -0.47340571 0.2432147756 0.40431003 -0.467658737 0.040373645广东 -4.609656
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