Dear R users,
?rgamma gives me :
rgamma(n, shape, rate = 1, scale = 1/rate)
rate: an alternative way to specify the scale.
The Gamma distribution with parameters shape = a and
scale = s has density
f(x)= 1/(s^a Gamma(a)) x^(a-1) e^-(x/s)
Should I understand that scale=1/rate ? Is it written somewhere ?
Then rgamma(n, shape=a, scale = s) should be equivalent to rgamma(n,
shape=a, rate =1/s).
I don't find this very clear.
Thanks for your help.
Randall
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