[R] Simulating a variable following an arbitrary distribution

[Fernando Henrique Ferraz Pereira da Rosa]

     Hi, I'd like to know if there's anything in R that could help me do
that. Let's suppose I have a density function of a random variable, for example
f(x) = (x^3)/4 0 < x < 2 and I would like to simulate it. For the common
distributions (exponencial, gamma, cauchy) there are the r-functions (rgamma,
rexp, runif, rcauchy, and so on).. But when the variable I want to simulate is
not one of those, how should I procede? I read some references on the subject
and saw that there are some algorithms that can do that, but I just wonder if
there is any implemented in R?

Thank you,

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