GCAS
Inhalt
Function
\[f\left( z\right) =y_0+\frac A{w\sqrt{2\pi }}e^{\frac{-z^2}2}\left( 1+|\sum_{i=3}^4\frac{a_i}{i!}H_i\left( z\right)| \right)\]
\[z=\frac{x-x_c}w\]
\[H_3=z^3-3z\]
\[H_4=z^4-6z^2+3\]
Brief Description
Gram-Charlier-Peakfunktion zur Verwendung in der Chromatografie.
Sample Curve
Parameter
Number: 6
Names: y0, xc, A, w, a3, a4
Meanings: y0 = offset, xc = center, A=area, w=half width, a3 = unknown, a4 = unknown
Lower Bounds: w > 0.0
Upper Bounds: none
Script Access
nlf_gcas(x,y0,xc,A,w,a3,a4)
Function File
FITFUNC\GRMCHARL.FDF
Kategorie
Peak Functions, PFW, Chromatography