Voigt profile
| Syntax: |
y = VOIGT(a,b,c,d)
|
The Voigt profile function is the convolution integral of a Gaussian and a Lorentzian function. We wish to evaluate

where f(E) is the Gaussian function:

and g(E) is the Lorentzian: 
Putting

This integral has been evaluated for b > 0 in terms of the complex
error function
.

The Voigt function implemented here is: 