# How to plot field lines in sage

I want to plot the field lines of an electric field, take for example that of an electric dipole. How can I do this in sage?

**Edit**: Perhaps my question was formulated too much in physicist slang... Mathematically I just want to plot the integral curves of a vector field for example: let $\vec{r}(x,y) = (x,y)$, $\vec{E_1} = \frac{\vec{r}}{|r|^{3}}$ and $\vec{E_2}(x,y) = \vec{E_1}(x-1,y)$

Then I want to plot the field lines of $\vec{E} = \vec{E_1} - \vec{E_2}$

The field line plot should look similar to this one:

I think in mathematica this is called a stream plot: http://reference.wolfram.com/mathemat...