Can you be more specific about what you want to do? It's possible to move the axis itself using some arcane matplotlib commands, but I don't think that's what you actually want - ?
I think that's exactly what the OP wants. There is no direct support for this in sage. My suggestion would be that you turn off the axis. Then draw a vertical and a horizontal line by yourself. OR, use matplotllib directly to get ticks support too.
Can you be more specific about what you want to do? It's possible to move the axis itself using some arcane matplotlib commands, but I don't think that's what you actually want - ?
I think that's exactly what the OP wants. There is no direct support for this in sage. My suggestion would be that you turn off the axis. Then draw a vertical and a horizontal line by yourself. OR, use matplotllib directly to get ticks support too.