Help me to fit my plot with pseudo-voigt function.

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Mirtunjay Kumar
Mirtunjay Kumar le 12 Avr 2017
Réponse apportée : kk le 18 Juin 2018
There are peak functions like Pseudo-Voigt function y = y0 + A * ( mu * (2/pi) * (w / (4*(x-xc)^2 + w^2)) + (1 - mu) * (sqrt(4*ln(2)) / (sqrt(pi) * w)) * exp(-(4*ln(2)/w^2)*(x-xc)^2) )
These functions are widely available in OriginLab. I have plotted (x,y) but unable to fit above equation and get the constants. How to fit this equation to graph and get these variables y0,xc,A,w and mu.

Réponses (1)

kk
kk le 18 Juin 2018
Hello, I found your pseudo-Voigt function and it seems to be working with a few small changes if x is a column vector: y = A*(mu*(2/pi)*(w./(4*(x-xc).^2 + w^2)) + (1 - mu)*(sqrt(4*log(2))/(sqrt(pi)*w))*exp(-(4*log(2)/w^2).*(x-xc).^2))

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