主成分分析法建模課后習(xí)題

第頁(yè)主成分分析法建模課后習(xí)題1、用主成分分析方法探討城市工業(yè)主體結(jié)構(gòu)。表1是某市工業(yè)部門(mén)13個(gè)行業(yè)8項(xiàng)指標(biāo)的數(shù)據(jù)表1某市工業(yè)部門(mén)13個(gè)行業(yè)8項(xiàng)指標(biāo)的數(shù)據(jù)年末固定資產(chǎn)凈值（萬(wàn)元）職工人數(shù)（人）工業(yè)總產(chǎn)值（萬(wàn)元）全員勞動(dòng)產(chǎn)率（元/人年）百元固定原資產(chǎn)值實(shí)現(xiàn)產(chǎn)值（元）資金利稅率（％）標(biāo)準(zhǔn)燃料消費(fèi)量（噸）能源利用效果（萬(wàn)元/噸）1(冶金)90342524551010911927282.00016.1001974350.1722(電力)4903197320351031334.2007.1005920770.0033(煤炭)6735211393767178036.1008.2007263960.0034(化學(xué))4945436241815572250498.10025.9003482260.9855(機(jī)械)1391902035052158981060993.20012.6001395720.6286(建材)122151621910351638262.5008.7001458180.0667(森工)23726572810312329184.40022.200209210.1528(食品)11062230785493523804370.40041.000654860.2639(紡織)17111239075210821796221.50021.500638060.27610(縫紉)12063930612615586330.40029.50018400.43711(皮革)21505704620010870184.20012.00089130.27412(造紙)525161551038316875146.40027.500787960.15113(文教藝術(shù)用品)1434113203193961469194.60017.80063541.574試用主成分分析方法確定8項(xiàng)指標(biāo)的樣本主成分（綜合變量）；若要求損失信息不超過(guò)15％，應(yīng)取幾個(gè)主成分2、某市為了全面分析機(jī)械類各企業(yè)的經(jīng)濟(jì)效益，選擇了8個(gè)不同的利潤(rùn)指標(biāo)，14家企業(yè)關(guān)于這8個(gè)指標(biāo)的統(tǒng)計(jì)數(shù)據(jù)如表3所示。試進(jìn)行主成分分析，并對(duì)所選取的主成分作出解釋。表214家企業(yè)的利潤(rùn)指標(biāo)的統(tǒng)計(jì)數(shù)據(jù)變量企業(yè)號(hào)凈產(chǎn)值利潤(rùn)率固定資產(chǎn)利潤(rùn)率總產(chǎn)值利潤(rùn)率銷(xiāo)售收入利潤(rùn)率產(chǎn)品成本利潤(rùn)率物耗利潤(rùn)率人均利潤(rùn)率流動(dòng)資金利潤(rùn)率140.424.77.26.18.38.72.44220.0225.012.711.211.012.920.23.5429.1313.23.33.94.34.45.50.5783.6422.36.75.63.76.07.40.1767.3534.311.87.17.18.08.91.72627.5635.612.516.416.722.829.33.01726.6722.07.89.910.212.617.60.84710.6848.413.410.99.910.913.91.77217.8940.619.119.819.029.739.62.44935.81024.88.09.88.911.916.20.78913.71112.59.74.24.24.66.50.8743.9121.80.60.70.70.81.10.