Origin分段线性拟合

Origin分段线性拟合1、绘制出需要拟合的曲线2、确定需要拟合的范围（起始数据行数和结束数据行数，即从第a个数据点拟合到第b个数据点），如下图，为我们需要拟合的范围。3、Analysis Fitt ing Fitt ing Lin ear Open Dialog3、Analysis Fitt ing Fitt ing Lin ear Open DialogData Analysis Tools Format Window HelpZDMathematicsDm ManipuhtioniFittingSignal ProtestingSpectroscopy卜1 Fit Linear,2 Create Baseline,.3 Integrate.1 Subtract Straight LineWubtrxt Reference打开对话框后，如下图冒|圜吕|屁 回厨圍彌丨唱會|茁带ElIt1 La st used?Fit LinearFit Polynomial.Open Dialog.Nonlinear Curve Fit. Ctrl+Norlin ear Surface Fit.”Simulate 匚urye.,.Fit Single Peak.r.Fit Multi-peaks.Fit BcponentiaL.,Fit SigmoidslLCompare Datasets.Compare Models.点击图中红框的加号，展开对话框Hi 自陀 q昼Ucscripiid Pci for Linear Fi u ingRecalculate日 Input Data園 Range 1|Graph2Ler111 YOlkge11EEroph2Ler1!1dtageuBookl Sheet1!Acurrent densVBoak1ShMt1!B,vcltage,ErrorI5IH田Hom选中红框右端的方框在From和To后面的框中输入第二部确定的拟合范围，点击0K。出现如下结果vollnoJntcrcept0. WHFib0.00199Slope-3.MUJE- 13. 02362E-63 StatisticsInterceptSlopeStatisticsYalueErrorValueErrorAdj. K-Squarcvoltagc0.84156aooiw-3. 94J912E-43. 023G2E-60.99897S甘曲田门广valtagt5umber of Points19Ucgroos of Freed17Rusitluu Sum of Squares2.2H72E-1Adj. R-Squaire0, 998971 DFSum of SquaresMoan SquareF ValueProbJFModal 10. 226760. 2267617106.03?250volmgcError 】了2- 2U72E-41. 3O27HE-5- -0绅州3 Fitted Curves PlotrvoTTafttI1 voltage上图中红框中的为截距和斜率，蓝框中的为拟合后的直线，下图为拟合后的直线1.0 -0.9 -0.8 -30.7 -O0.5 -0.4 -0.3 -门* 2 T | I i i i i i i 1 i i i 1 i0200400600 SOO 100012001400current density (mA cm2)