R软件中的主成分分析报告

问题表 1 为某地区农业生态经济系统各区域单元相关指标数据，运用主成分分析方法，用更少的指标信息较为精确地描述该地区农业生态经济的进展状况。表 1 某农业生态经济系统各区域单元的有关数据样本序号x1：人口密度(人/km2)x 2：人均耕地面积(ha)x 3：森林覆盖率(%)x 4：农民人均纯收入(元/人)x 5：人均粮食产量 (kg/人)x 6：经济作物占农作物播面比例(％)x 7：耕地占土地面积比率(％)x 8：果园与林地面积之比(％)x 9：灌溉田占耕地面积之比(％)1363.9120.35216.101192.11295.3426.72418.4922.23126.2622141.5031.68424.3011752.35452.2632.31414.4641.45527.0663100.6951.06765.6011181.54270.1218.2660.1627.47412.4894143.7391.33633.2051436.12354.2617.48611.8051.89217.5345131.4121.62316.6071405.09586.5940.68314.4010.30322.932668.3372.03276.2041540.29216.398.1284.0650.0114.861795.4160.80171.106926.35291.528.1354.0630.0124.862862.9011.65273.3071501.24225.2518.3522.6450.0343.201986.6240.84168.904897.36196.3716.8615.1760.0556.1671091.3940.81266.502911.24226.5118.2795.6430.0764.4771176.9120.85850.302103.52217.0919.7934.8810.0016.1651251.2741.04164.609968.33181.384.0054.0660.0155.4021368.8310.83662.804957.14194.049.1104.4840.0025.7901477.3010.62360.102824.37188.0919.4095.7215.0558.4131576.9481.02268.0011255.42211.5511.1023.1330.0103.4251699.2650.65460.7021251.03220.914.3834.6150.0115.59317118.5050.66163.3041246.47242.1610.7066.0530.1548.70118141.4730.73754.206814.21193.4611.4196.4420.01212.94519137.7610.59855.9011124.05228.449.5217.8810.06912.65420117.6121.24554.503805.67175.2318.1065.7890.0488.46121122.7810.73149.1021313.11236.2926.7247.1620.09210.078解答：1 模型选择x1：人口密度(人/km2) x 2：人均耕地面积(ha)x 3：森林覆盖率(%) x 4：农民人均纯收入(元/人)x 5：人均粮食产量 (kg/人) x 6：经济作物占农作物播面比例(％)x 7：耕地占土地面积比率(％) x 8：果园与林地面积之比(％)x 9：灌溉田占耕地面积之比(％)做主成分分析，命名第一主成分为 Z1,第二主成分为 Z2，第三主成分为Z3，依次类推，当前 m 个主成分的累积贡献率达到 80%与以上，我们就说脑的大小与前 m 主成分有关。并求解转化后的与之间的相关系数。2 问...