What kind of interpolation is used by contour by default?

I'm looking for information on what interpolation scheme contourf uses by default. I suspect it is a 'cubic' interpolation, but I'm not certain and couldn't find the answer on any forum or help page within MATLAB.

[Star Strider]

You most likely need to ask MathWorks. It is apparently not possible to examine the code for contourc or contour, and even Undocumented MATLAB has no information on it.

Answer 1

[mingluo]

I think it's a two-dimensional interpolation