一元回歸分析matlab計算

1、一元回歸分析一元回歸分析MATLAB的計算的計算利用matlab計算一元回歸分析函數(shù)如下所示，根據(jù)試驗數(shù)據(jù)x和y，可在matlab中利用一元擬合實現(xiàn)回歸直線的計算、相關(guān)系數(shù)計算、同時得出一個散點圖和回歸直線圖。Matlab程序代碼如下：程序代碼如下：x=[15.025.830.036.644.4]y=[39.442.941.043.149.2]x，y以數(shù)組的形式輸入n=1擬合階數(shù)設(shè)置為1p=polyfit(xyn)計算擬合系數(shù)a，bxi

2、=linspace(1545100)規(guī)定擬合曲線橫軸的分度z=polyval(pxi)虛擬出擬合曲線上的點plot(xybxizr)畫出散點圖和回歸直線圖xlabel(x)ylabel(y=0.2924x34.2417)legend(散點圖和回歸直線)具體程序和具體程序和程序的執(zhí)行結(jié)果如下所示：程序的執(zhí)行結(jié)果如下所示：x=[15.025.830.036.644.4]x=15.000025.800030.000036.600044.400

3、0y=[39.442.941.043.149.2]y=39.400042.900041.000043.100049.2000n=1p=polyfit(xyn)p=0.292434.2417xi=linspace(1545100)xi=Columns1through1338.628238.716838.805538.894138.982739.071339.159939.248539.337239.425839.514439.603039

4、.6916Columns14through2639.780239.868839.957540.046140.134740.223340.311940.400540.489240.577840.666440.755040.8436Columns27through3940.932241.020941.109541.198141.286741.375341.463941.552641.641241.729841.818441.907041.9

5、956Columns40through5242.084342.172942.261542.350142.438742.527342.616042.704642.793242.881842.970443.059043.1476Columns53through6543.236343.324943.413543.502143.590743.679343.768043.856643.945244.033844.122444.211044.299

6、7Columns66through7844.388344.476944.565544.654144.742744.831444.920045.008645.097245.185845.274445.363145.4517Columns79through9145.540345.628945.717545.806145.894845.983446.072046.160646.249246.337846.426446.515146.6037C