def mnc2mvsk(args):
 (mnc, mnc2, mnc3, mnc4) = args
 mc = mnc
 mc2 = (mnc2 - (mnc * mnc))
 mc3 = (mnc3 - (((3 * mc) * mc2) + (mc ** 3)))
 mc4 = (mnc4 - ((((4 * mc) * mc3) + (((6 * mc) * mc) * mc2)) + (mc ** 4)))
 return mc2mvsk((mc, mc2, mc3, mc4))

def mnc2mvsk ( args ) : ( mnc , mnc2 , mnc3 , mnc4 ) = args mc = mnc mc2 = ( mnc2 - ( mnc * mnc ) ) mc3 = ( mnc3 - ( ( ( 3 * mc ) * mc2 ) + ( mc ** 3 ) ) ) mc4 = ( mnc4 - ( ( ( ( 4 * mc ) * mc3 ) + ( ( ( 6 * mc ) * mc ) * mc2 ) ) + ( mc ** 4 ) ) ) return mc2mvsk ( ( mc , mc2 , mc3 , mc4 ) )
convert central moments to mean .