Immagine:Beta distribution pdf.png
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Probability density function for the Beta distribution
gnuplot source under GPL:
dbeta(x,a,b) = exp((a-1)*log(x)+(b-1)*log(1-x)-lgamma(a)-lgamma(b)+lgamma(a+b))
pbeta(x,a,b) = ibeta(a,b,x)
set samples 1001
set terminal postscript enhanced color solid lw 2 "Times-Roman" 20
set output
set xrange [0:1]
set xtics 0.1
f(x,y,z) = dbeta(x,y,z)
set yrange [0:2.6]
set ytics 0.2
set key 0.61,2.4
#f(x,y,z) = pbeta(x,y,z)
#set ytics 0.1
#set key 0.21,0.94
plot \
f(x, 1.0,0.67) title "{/Symbol a} = {/Symbol b} = 0.5", \
 |
This work is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or any later version. This work is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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