Re: [Gnuplot-info] plotting normal plus binomial

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

set samples 100
plot int(t),binom(t,n,p) title 'Binomial' w lp, \
     t,normal(t,mu,s2) title 'Normal'

you'll get 10 points plotted one over the other, which shouldn't
be a problem
- unless you use an old-style pen-plotter, this device may scratch
holes into the paper...


Allin Cottrell wrote:
> 
> I can get the normal and the binomial superimposed via:
> 
> comb(n,k) = n!/(k!*(n-k)!)
> binom(k,n,p) = comb(int(n),int(k))*p**k*(1-p)**(n-k)
> normal(x,mu,s2) = 1/(sqrt(2*pi*s2))*exp(-(x-mu)**2/(2*s2))
> set parametric
> p=0.5
> n=8
> mu=n*p
> s2=n*p*(1-p)
> set trange[0:n]
> set samples n+1
> plot t,binom(t,n,p) title 'Binomial' w lp, \
>      t,normal(t,mu,s2) title 'Normal'
> 
> Question: is there any way to get the normal curve to be smooth 
> while the binomial one is properly discrete?  It seems to me this 
> implies conflicting settings for "samples", but maybe there's a 
> clever trick?
> 
> Allin Cottrell
> 
> 
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