Origin分段線性擬合

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(gè)數(shù)據(jù)點(diǎn)擬合到第b個(gè)數(shù)據(jù)點(diǎn)），如下圖，為我們需要擬合的范圍。

3、Analysis—Fitting—FittingLineartOpenDialogCreat亡Creat亡Baseline...SimulateCurve...Integrate...SubtractStraightLineIntegrate...SubtractStraightLineSubtractReferenceData...FitSinglePeak...FitMulti-peaks...0.0-FitExponential...FitSigmoidal...匚0.0-FitExponential...FitSigmoidal...匚ompareDatasets...匚ompareModels...DataAnalysisDataAnalysisMathematics?DataManipulation?III—-1kikFitting?FitLinear?1<Lastused>SignalProcessing?Spectroscopy?FitPolynomial...JOpenDialog...NonlinearCurveFit...Ctrl-i-VEJBL1FitLinear...NonlinearSurfaceFit...打開對(duì)話框后，如下圖點(diǎn)擊圖中紅框的加號(hào)，展開對(duì)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(diǎn)擊OK。出現(xiàn)如下結(jié)果00.70.40.S0.5-fittedCurvesPlot上圖中紅框中的為截距和斜率，藍(lán)框中的為擬合后的直線，下圖為擬合后的直線i|voltage-iLinearFi'02004006008001000120014=00currentdensity(mA/cm2)voltajcrIntercept0.Bl156Slope?7蜩[疽4vo]tape0.2u.oom3.D2362E-60.S4volt二"O.OCC^voltageSuuobtii-ofJoints19Degreesoi'Freedom17ResidualSumoi'Squares2.2L472E-4Adj.K-S￡[iiarto.tms；口StatisticsInt&rctptSlopeStatisticsValiiQErrorValueErrorAdj.K-!k|Liarcvoltage0.U4L560.OTIV9-3.9B9L2E-43.02362E-6o.tmy?5SummaryDPSumoi'StuartsMeanSquare1-VaiutPmb〉FModel]0.226760.22