Constructor for genpop objects.
The function genpop creates a genpop object from
a matrix of alleles counts where genotypes are in rows and alleles
in columns. This table must have correct names for rows and
columns.
The function as.genpop is an alias for genpop function.
is.genpop tests if an object is a valid genpop object.
Note: to get the manpage about genpop, please type
'class ? genpop'.