InvsPoly
Function
![y=y_0+\frac A{1+A_1\left( 2\frac{x-x_c}w\right) ^2+A_2\left( 2\frac{x-x_c}w\right) ^4+A_3\left( 2\frac{x-x_c}w\right) ^6}](//d2mvzyuse3lwjc.cloudfront.net/doc/de/UserGuide/images/math/a/5/1/a51ebaf59c60f264208da1faa9f6da8d.png)
Brief Description
Inverse polynomial peak function with center.
Sample Curve
![Image:InvsPoly.png?](//d2mvzyuse3lwjc.cloudfront.net/doc/de/UserGuide/images/InvsPoly/InvsPoly.png)
Parameter
Number: 7
Names: y0, xc, w, A, A1, A2, A3
Meanings: y0 = offset, xc = center, w = width, A = amplitude, A1 = coefficient, A2 = coefficient, A3 = coefficient
Lower Bounds: w > 0.0
Upper Bounds: none
Script Access
nlf_invspoly(x,y0,xc,w,A,A1,A2,A3)
Function File
FITFUNC\INVSPOLY.FDF
Category
Spectroscopy, PFW, Peak Functions
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