### Syntax

y = fitfun.voigtfwhm(x,p)

### Description

y = fitfun.voigtfwhm(x,p) calculates the voigt function. The width parameters define the FWHM value. The integral of the function is normalized assuming that $dx = 1$. The conversion between different width:

• gamma parameter of the Lorentzian $\gamma = w_L/2$
• standard deviation of the Gaussian $\sigma = w_G/\sqrt{8\cdot\ln(2)}$

### Input Arguments

x
Input coordinates where the function will be calculated.
p
Parameters in a vector with elements [A x0 wG wL]:
• A integral of the output assuming $dx=1$ (for different $dx$ multiply the amplitude with $dx$ to keep the integral constant).
• x0 peak center positions.
• wG FWHM of the Gaussian component.
• wL FWHM of the Lorentzian component.