def pc( self ):
        """ e.g. 1000 x 2 U[:, :npc] * d[:npc], to plot etc. """
        n = self.npc
        return self.U[:, :n] * self.d[:n]
def pc( self ):
        """ e.g. 1000 x 2 U[:, :npc] * d[:npc], to plot etc. """
        n = self.npc
        return self.U[:, :n] * self.d[:n]
def pc ( self ) : n = self . npc return self . U [ : , : n ] * self . d [ : n ]
e.g. 1000 x 2 U[:, :npc] * d[:npc], to plot etc.
e . g . 1000 x 2 U [ : : npc ] * d [ : npc ] to plot etc .