.. automodule:: pygp.covar
    :members: CovarianceFunction

    .. automodule:: pygp.covar.combinators
        :members: SumCF, ProductCF, ShiftCF

    .. automodule:: pygp.covar.se
        :members: 
	  SqexpCFARD
	  
    .. automodule:: pygp.covar.noise
        :members: NoiseCFISO

    .. automodule:: pygp.covar.linear

    .. automodule:: pygp.covar.fixed