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- | ====== Predefined Fit Curves Equations ====== | ||
- | All predefined Fit Curves are listed in this table. You also can specify [[custom_fit_equation|custom fit equation]]. Unlike custom fit equations these curves can be adjusted with mouse on Fit Plot. | ||
- | ^ Name ^ Formula ^ Parameters meaning ^ Additional Properties ^ | ||
- | | Line | <m>y = a x + b</m> | //a// -- linear \\ //b// -- constant | ||
- | | Parabola | <m>y = a x^2 + b x + c</ | ||
- | | Spline | Natural cubic spline, \\ on each //i//-th piece: \\ < | ||
- | | Gaussian | <m>y = a exp(− ln(2) ({x−x_0}/ | ||
- | | Gaussian-A \\ (area-normalized) | <m>y = sqrt{{ln {2}} / pi} ~ a / dx exp(− ln(2) ({x−x_0}/ | ||
- | | Lorentzian | <m>y = a 1 / {1 + ({x−x_0} / dx)^2}</ | ||
- | | Lorentzian-A \\ (area-normalized) | <m>y = a / {pi dx} 1 / {1 + ({x−x_0} / dx)^2}</ | ||
- | | Gauss Derivative | <m>y = − 2 ln(2) ~ {a (x−x_0)} / {dx^2} exp(− ln(2) ({x−x_0}/ | ||
- | | Lorentz Derivative | < | ||
- | |||
- | ===== See Also ===== | ||
- | * [[fitting]] | ||
- | * [[spline]] | ||
- | * [[guess_peaks]] |