30.1 Curve Fitting Functions

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All available built-in curve fitting functions are listed here. These functions can be accessed from the Nonlinear Curve Fit tool.

Some of the functions are also available in the Peak Analyzer tool, please refer to the Peak Analyzer Functions section also in Appendix 3.


Origin Basic Functions

Allometric1 Beta Boltzmann Dhyperbl ExpAssoc
ExpDec1 ExpDec2 ExpDec3 ExpGrow1 ExpGrow2
Gauss GaussAmp Hyperbl Logistic LogNormal
Lorentz Poisson Pulse Rational0 Sine
Voigt


Convolution

GaussMod Voigt


Exponential

Asymptotic1 BoxLucas1 BoxLucas1Mod BoxLucas1Mod Chapman
Exp1P1 Exp1p2 Exp1p2md Exp1p3 Exp1P3Md
Exp1P4 Exp1P4Md Exp2P Exp2PMod1 Exp2PMod2
Exp3P1 Exp3P1Md Exp3P2 ExpAssoc Exponential
ExpDec1 ExpDec2 ExpDec3 ExpDecay1 ExpDecay2
ExpDecay3 ExpGro1 ExpGro2 ExpGro3 ExpGrow1
ExpGrow2 ExpGrow3Dec2 ExpGrowDec ExpLinear Langevin
LangevinMod MnMolecular MnMolecular1 Shah Stirling
YldFert YldFert1


Growth/Sigmoidal

BiDoseResp BiHill BoltzIV Boltzmann :DoubleBoltzmann
DoseResp Hill Hill1 Logistic Logistic5
MichaelisMenten SGompertz SLogistic1 SLogistic2 SLogistic3
SRichards1 SRichards2 SWeibull1 SWeibull2


Hyperbola

Dhyperbl Hyperbl HyperbolaGen HyperbolaMod RectHyperbola


Logarithm

Bradley Logarithm Log2P1 Log2P2 Log3P1


Peak Functions

Asym2Sig Beta Bigaussian CCE ECS
Extreme Gauss Gaussian GaussAmp GaussMod
GCAS Giddings InvsPoly Laplace LogNormal
Logistpk Lorentz PearsonVII PsdVoigt1 PsdVoigt2
Voigt Weibull3

Piecewise

PWL2 PWL3


Polynomial

Constant Cubic Line LineMod Parabola
Poly Poly4 Poly5


Power

Allometric1 Allometric2 Asym2Sig Belehradek BlNeld
BlNeldSmp FarazdaghiHarris FreundlichEXT Gunary LangmuirEXT1
LangmuirEXT2 Pareto Pow2P1 Pow2P2 Pow2P3
Power Power0 Power1 Power2


Rational

BET BETMod Holliday Holliday1 Nelder
Rational0 Rational1 Rational2 Rational3 Rational4
Rational5 Reciprocal ReciprocalMod Reciprocal0 Reciprocal1


Waveform

SawtoothWave Sine SineDamp SineSqr SquareWave
SquareWaveMod Step


Chromatography

CCE ECS Gauss GaussMod GCAS
Giddings


Electrophysiology

BoltzIV Boltzmann DoubleBoltzmann ExpDec1 ExpDec2
ExpDec3 Gauss Goldman Hill


Enzyme Kinetics

CompInhib NoncompInhib UncompInhib MixedModelInhib SubstrateInhib
MichaelisMenten Hill


Pharmacology

BiDoseResp Biphasic DoseResp MichaelisMenten OneSiteBind
OneSiteComp TwoSiteBind TwoSiteComp


Rheology

Bingham Carreau Cross Herschel MYEGA
VFT


Spectroscopy

GaussAmp InvsPoly Lorentz PearsonVII PsdVoigt1
PsdVoigt2 Voigt


Statistics

Exponential ExponentialCDF Extreme GammaCDF Gauss
GaussAmp Gumbel Laplace Logistic LogNormal
LognormalCDF Lorentz Pareto Pareto2 Poisson
Rayleigh PearsonIV Weibull WeibullCDF


Quick Fit

Boltzmann DoseResp ExpDecay1 ExpGrow1 Gauss
Hill Hyperbl Logistic Lorentz Sine
Voigt


Multiple Variables

GaussianLorentz Helix HillBurk Line3 LineExp
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