ALEA::BROWNIAN1
Arguments: nc binf bsup long sigma [generic-function]
Random walk, simulation of the brownian motion.
<sigma> is associated with the <bandwidth> of the gaussian distribution,
<nc> the initial value ,<long> the length of the sequence and
<sigma> is associated with the <bandwidth> of the gaussian distribution,
<nc> the initial value ,<long> the length of the sequence and
<binf> and <bsup> the inferior boundary and the superior boundary.
Warning: boudaries are considered as elastic.