Compute spline-interpolated log-determinant grid (MATLAB lndetint style).
- Parameters:
- W : array-like
Spatial weights matrix.
- rmin : float, default=0.0
Lower bound of the rho grid.
- rmax : float, default=1.0
Upper bound of the rho grid.
- n_grid : int, default=100
Number of grid points.
- Returns:
Dictionary with rho and lndet vectors.
- Return type:
dict