Hi, sorry about my first post. I didn't realize your question. About your problem: just reuse the number generator and construct a new instance of bernoulli_distribution with the new probability: int main() { double p = 0.5; boost::mt19937 rng; boost::bernoulli_distribution<> d(p); typedef boost::variate_generator< boost::mt19937&, boost::bernoulli_distribution<>
generator;
generator g(rng, d); int time_steps = 2; for(int i = 0; i < 10; ++i) { // change probability every second step if(i % time_step == 0){ // change probability by 0.1 every second step p += 0.1; g = generator(rng, boost::bernoulli_distribution<>(p)); } std::cout << g() << std::endl; } } This does not work in the case of the number generator because it is declared as reference parameter. Henning Barco You schrieb:
Hi,
Continue this question. I want to have dynamic Bernoulli experiment, which has the p changed dynamically with time!
How can I implement it? thanks!
On Tue, Mar 31, 2009 at 4:12 PM, Barco You <barcojie@gmail.com> wrote:
Hi peter,
Okay, I see now ,thanks!
On Tue, Mar 31, 2009 at 4:03 PM, Peter Bartlett <pete@pcbartlett.com>wrote:
Quoting Barco You <barcojie@gmail.com>:
Hi,
Sorry, wait!!! [...]
In the first case one variate_generator is constructed and it is used 10 times.
In the second case 10 variate_generators are contructed and each used once. Since they are default constructed, they are each primed to return the same sequence. In particular they return the same first number, 0.
Pete
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