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

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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.

Answers (1)

kk on 18 Jun 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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