(self, arg)
Adds an element from a plot's series to an existing plot.

        Examples
        ========

        Consider two ``Plot`` objects, ``p1`` and ``p2``. To add the
        second plot's first series object to the first, use the
        ``append`` method, like so:

        >>> from sympy import symbols
        >>> from sympy.plotting import plot
        >>> x = symbols('x')
        >>> p1 = plot(x*x)
        >>> p2 = plot(x)
        >>> p1.append(p2[0])
        >>> p1
        Plot object containing:
        [0]: cartesian line: x**2 for x over (-10.0, 10.0)
        [1]: cartesian line: x for x over (-10.0, 10.0)

        See Also
        ========
        extend
Adds an element from a plot's series to an existing plot.
Adds an element from a plot s series to an existing plot .
def append(self, arg):
        """Adds an element from a plot's series to an existing plot.

        Examples
        ========

        Consider two ``Plot`` objects, ``p1`` and ``p2``. To add the
        second plot's first series object to the first, use the
        ``append`` method, like so:

        >>> from sympy import symbols
        >>> from sympy.plotting import plot
        >>> x = symbols('x')
        >>> p1 = plot(x*x)
        >>> p2 = plot(x)
        >>> p1.append(p2[0])
        >>> p1
        Plot object containing:
        [0]: cartesian line: x**2 for x over (-10.0, 10.0)
        [1]: cartesian line: x for x over (-10.0, 10.0)

        See Also
        ========
        extend

        """
        if isinstance(arg, BaseSeries):
            self._series.append(arg)
        else:
            raise TypeError('Must specify element of plot to append.')
def append ( self , arg ) : if isinstance ( arg , BaseSeries ) : self . _series . append ( arg ) else : raise TypeError ( 'Must specify element of plot to append.' )