Origin分段線性擬合

1、Origin分段線性擬合1、繪制出需要擬合的曲線2、確定需要擬合的范圍（起始數(shù)據(jù)行數(shù)和結(jié)束數(shù)據(jù)行數(shù)，即從第a個數(shù)據(jù)點擬 合到第b個數(shù)據(jù)點），如下圖，為我們需要擬合的范圍。3、Analysis Fitting Fitting Linear t Open DialogCreat亡 Creat亡 Baseline.Simulate Curve.Integrate.Subtract Straight LineIntegrate.Subtract Straight LineSubtract Reference Data.Fit Single Peak.Fit Multi-peaks.0.0-Fit Ex

2、ponential.Fit Sigmoidal.匚0.0-Fit Exponential.Fit Sigmoidal.匚ompare Datasets.匚ompare Models.DataAnalysisDataAnalysisMathematicsData ManipulationIII-1kikFittingFit Linear1 Signal ProcessingSpectroscopyFit Polynomial.JOpen Dialog.Nonlinear Curve Fit. Ctrl-i-VEJ BL1 Fit Linear.Nonlinear Surface Fit.打開對話

3、框后，如下圖點擊圖中紅框的加號，展開對話框選中紅框右端的方框在From和To后面的框中輸入第二部確定的擬合范圍，點擊OK。出現(xiàn)如下結(jié) 果00.70. 40. S0.90. 60.30.5-fitted Curves Plot上圖中紅框中的為截距和斜率，藍框中的為擬合后的直線，下圖為擬合后的直 線i | voltage-i Linear Fi02004006008001000120014=00current density (mA/cm2)voltajcrIntercept 0. Bl 156Slope? 7 蜩疽4votape0.2u. oom3. D2362E-60.S4volt 二O.OCCvoltageSuuobtii- of Joints19Degrees oi Freedom17Residual Sum oi Squares2.2L472E-4Adj. K-Siiarto. tms；口 StatisticsInt&rctptSlopeStatisticsValiiQErrorValueErrorAdj. K-!k|Liarcvoltage0. U4L560. OTIV9-3. 9B9L2E-43. 02362E-6o. tmy?5 SummaryDPSum oi StuartsMean Square1- VaiutPmbFModel0. 226760. 2