polartoolkit.grid_trend

grid_trend(da, coords=('x', 'y', 'z'), deg=1, plot=False, **kwargs)

Fit an arbitrary order trend to a grid and use it to detrend.

Parameters:

• da (xarray.DataArray) – input grid

• coords (tuple[str, str, str], optional) – coordinate names of the supplied grid, by default [‘x’, ‘y’, ‘z’]

• deg (int, optional) – trend order to use, by default 1

• plot (bool, optional) – plot the results, by default False

• kwargs (Any)

Returns:

returns xarray.DataArrays of the fitted surface, and the detrended grid.

Return type:

tuple[xarray.DataArray, xarray.DataArray]