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// $Id: getRandomWeights.h 962 2006-11-07 15:13:34Z privmane $
#ifndef __GET_RANDOM_WEIGHTS
#define __GET_RANDOM_WEIGHTS
#include "definitions.h"
class getRandomWeights {
public:
// this function starts with a vector of weights like that (1,1,1,1,1,1,...1)
// it then take two positions by random
// add 1 to the first, and substract 1 from the second.
// if it can not substract 1 from the second, it draw a new "second"
static void randomWeights(Vdouble& weights,
const MDOUBLE expectedNumberOfSwapsPerPosition);
// a position is chosen randomly and the weight of this position is
// sampled from a gamma distribution with parameters alpha = 1/temperature
// and beta = 1/temperature.
static void randomWeightsGamma(Vdouble& weights,
const MDOUBLE temperature);
// this function starts with a vector of weights like that (0,0,0,...,0)
// a position is chosen randomly and the weight of this position
// is increased by 1. This process is repeated weights.size() times.
static void standardBPWeights(Vdouble& weights);
};
#endif
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