Re: [Gnuplot-info] fitting a gaussian

[Thomas S. <t.s...@fz...>]

define the gauss-function,

gauss(x)=amplitude/(sigma*sqrt(2.*pi))*exp(-(x-position)**2/(2.*sigma**2))

fit it to the data,

fit 'datafilename' gauss(x) via amplitude, position, sigma

and then plot it:

plot 'datafilename' with histeps, gauss(x)

and try to set 'amplitude', 'position', and 'sigma' to reasonable
values before fitting, otherwise the fit may get lost. 


crish wrote:
> 
> 
> 
> Dear GNU ! 
> 
> I have a doubt regarding , fitting a gaussian for a plot 
> 
> I have a x,y data, I have plotted it and I want to know the area of the
> plot ( it is a normal distribution) 
> and the full width half maximum of the plot . 
> 
> Is it possible to do it in GNU if so kindly  let me know ! 
> 
> regards 
> balaji
> 
> 
> 
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