[SciPy-Dev] griddata equivalent of matlab "V4" option

[Alexandre Gramfort]

> Is there a good reason to implement it?

I need to produce images like:

http://fieldtrip.fcdonders.nl/_media/tutorial/plotting/figure4.png?cache=&w=568&h=496

the black dots are the sensors where measurements are done.

the interpolation needs to extrapolate a tiny bit to fill the circle
although the sensors are a little inside. The options of griddata
don't do the job. cubic cannot extrapolate and nearest is not nice.

Alex