This is the base class of random variable, inherited from bandicoot::BASE.
See also
Parent class: bandicoot::BASE
New attributes: RAND_VAR$dist, RAND_VAR$prm
New methods: RAND_VAR$..init.., RAND_VAR$..str..,
RAND_VAR$E, RAND_VAR$Var, RAND_VAR$set_prm