3.2.6.5. A_FMM.Layer.calculate_epsilon

Layer.calculate_epsilon(x: ndarray = 0.0, y: ndarray = 0.0, z: ndarray = 0.0) → dict[str, ndarray]

Return epsilon given the coordinates

The epsilon returned here is the one reconstructed from the Fourier transform. The epsilon is reconstructed on the meshgrid of x,y, and z.

Parameters:

• x (array_like) – x coordinates (1D array).

• y (array_like) – y coordinates (1D array).

• z (array_like) – z coordinates (1D array).

Returns:

Epsilon value at coordinates. Shape of ndarray is the same as x,y, and z.

Return type:

ndarray

Raises:

ValueError – if x,y,z have different shapes