Python与MATLAB进行插值

Question

I want to leave MATLAB for full python integration in my scripts, and I realised that doing the same interpolation with the same values does not produce the same result on both languages! I am pretty sure the matlab code was correct so I am wondering if what I did on python is the same.

The MATLAB code is:

F = TriScatteredInterp( xPanel', yPanel', COPEN', 'natural' );
toolCOPEN = F( xTool', yTool' );
toolCOPEN( isnan( toolCOPEN ) ) = (-1)

which happens to be a one line code with griddata:

toolCOPEN = griddata( ( xPanel, yPanel ),
                      COPEN,
                      ( xTool, yTool ),
                      method = 'linear',
                      fill_value = '-1'
                      )

The final toolCOPEN differs and I am really wondering why..? I would guess they both use Delaunay Triangulation which should produce the same results...

Thank you for your help!

Answer 1

您在Matlab中使用的是natural邻居插值，但是在Python中使用的是linear插值，这可能会导致结果差异。