Method line

xarray/tests/test_dataarray.py:5064–5067

(x, a, b)

        # nonsense function to make the optimization fail
        def line(x, a, b):
            if a > 10:
                return 0
            return a * x + b

        da = DataArray(
            [[1, 3, 5], [0, 20, 40]],